Revisions and the edition of this document
The current and most recently published edition of this document is available at www.milleteknik.com.
The validity of this document can not be guaranteed, as new editions are published without prior notice.
Original instructions for use: Swedish.[1].
Instructions for use, technical data and translations thereof may contain errors. It is always the responsibility of the installer to install the product in a safe manner.
Symbols
Symbols | Name | Explanation |
|---|---|---|
![]() | Warning | Risk of electric shock, improper installation or hot surfaces. Appears in some manuals |
![]() | Note | Used for supplementary information that clarifies the text. |
![]() | Caution/Important | Indicates the risk of equipment damage or malfunction. Also used for information that is important but not security-related |
![]() | Tips | Displays practical advice or shortcuts for installation, operation, or service. |
![]() | CE marking | The product complies with applicable EU directives and harmonised standards. |
![]() | Read the manual | Please read manual before installation and service. |
![]() | Do not dispose of in household waste | The product is covered by the WEEE Directive and must not be disposed of with household waste, it must be recycled and delivered to a recycling centre. |
Recycling | Packaging, products and other materials that do not contain electronics must be recycled in accordance with local environmental regulations. |
Installation video
Installation — general information
Installation shall be carried out by a competent electrician in accordance with the applicable national electrical installation rules.
The product is of protection class I and must be connected to a grounded 230 V AC circuit.
A main switch according to IEC 60947-1 shall be provided in the fixed installation. The switch should be easily accessible and clearly marked with its function.
The area of the supply cable shall be at least 1,0 mm² and fitted with a fuse T 2,5 A (slow-blown) or equivalent.
AC and low voltage cables must not be pulled together. Keep separate cable chutes or bundles
Check that protective earth (PE) is properly connected before turning on voltage.
Ensure free air circulation around the enclosure at least 100 mm, unless otherwise specified. Ventilation openings must not be covered.
The product is intended for indoor installation in normal environment (pollution number 2 and indoor class 1).
These general requirements apply to all Milleteknik products with 230 V mains connection.
Requirements for main switch, fuse and cable area
In order to comply with applicable electrical safety requirements, the installation shall be equipped with a main switch according to IEC 60947-1.
Component | Requirements |
|---|---|
Main switch | A main switch according to IEC 60947-1 shall be included in the installation and be easily accessible. Separated phase (L) and neutral (N) |
Fuse | The supply circuit shall be protected by a fuse or automatic fuse with rated current according to the product specification (normally T 2,5 A slow-blow or equivalent). Refer to the device's nameplate. |
Fuses | Approved type according to IEC 60127. |
Cross-sectional area (230 V) | At least 1,0 mm2 |
Cable length | In the case of longer wiring, voltage drops should be taken into account so that the operating voltage does not fall below 230 V ± 10% at the unit. |
Strain relief | All cables must be properly secured and strain relief checked before energizing the unit. |
These requirements apply to all Milleteknik products with 230 V mains connection.
The table below shows recommended cable area for low current installations at different voltages, current strengths and cable lengths. Values are based on copper cable and a maximum voltage drop of approximately 3% to ensure operational reliability.
V | Current strength (A) | Cable length 10 meters | Cable length 30 meters | Cable length 60 meters | Cable length 100 meters |
|---|---|---|---|---|---|
24V | 1 A | 0,75 mm2 | 0,75 mm2 | 1,5 mm2 | 1,5 mm2 |
24V | 3A | 0,75 mm2 | 0,75 mm2 | 1,5 mm2 | 2,5 mm2 |
24V | 5A | 0,75 mm2 | 1,5 mm2 | 2,5 mm2 | 4 mm2 |
24V | 10A | 1,5 mm2 | 2,5 mm2 | 6 mm2 | -* |
24V | 15A | 1,5 mm2 | 4 mm2 | -* | -* |
24V | 25A | 2,5 mm2 | 6 mm2 | -* | -* |
24V | 40A | 4,0 mm2 | -* | -* | -* |
* Cable area would exceed connector terminal dimensions therefore it is not possible to use cable larger than 6 mm! 2 | |||||
Variant overview NOVA
Product name | Certified name | Motherboard: PRO1 | Motherboard PRO2: | Motherboard PRO2 v3 | Motherboard: PRO3 |
|---|---|---|---|---|---|
NOVA 12V 10A FLX S | 12 V meets the requirements but is not certified. | - | X | - | X |
NOVA 12V 10A FLX M | NOVA 13100-FLX | - | X | - | X |
NOVA 12V 10A FLX L | It meets the requirements but is not certified. | - | - | - | X |
NOVA 24V 5A FLX S | NOVA 25 50-FLX-S | X | X | - | X |
NOVA 24V 10A FLX S | NOVA 25 100-FLX-S | X | X | - | X |
NOVA 24V 5A FLX M | NOVA 25 50-FLX-M | X | X | - | X |
NOVA 24V 10A FLX M | NOVA 25 100-FLX-M | X | X | - | X |
NOVA 24V 15A FLX M | NOVA 25 150-FLX-M | X | X | X | - |
NOVA 24V 25A FLX M | NOVA 25 250-FLX-M | X | X | X | - |
NOVA 24V 5A FLX L | NOVA 25 50-FLX-L | X | X | - | X |
NOVA 24V 10A FLX L | NOVA 25 100-FLX-L | X | X | - | X |
NOVA 24V 15A FLX L | NOVA 25 150-FLX-L | X | X | X | - |
NOVA 24V 25A FLX L | NOVA 27 250-FLX-L | X | X | X | - |
Read this first!
Electronics, regardless of enclosure, are intended for use in a controlled indoor environment. Mains voltage should be disconnected during installation.
It is the installer's responsibility that the system is suitable for its intended use. Only authorized persons should install and maintain the system.
All information subject to change.
About glass tube fuses on certified devices
There are glass tube fuses on the circuit board's load outputs, these have a tripping time of approx. 150 ms. In the event that a glass tube fuse trips on ONE load output, the voltage on ALL load outputs drops to 0 V for 150 ms.
The installer is responsible for ensuring that there is an energy buffer of at least 150 ms in systems that the battery backup supplies power to or accepts a power failure of 150 ms.
Component overviews
Component overviewNOVA FLX M

Letter | Explanation |
|---|---|
A | Bracket, reversible for wall mounting or 19 "rack. |
B | Tamper switch. If alarm class 3 (SSF) is to be met, the tamper switch must be on the wall. |
C | Cabinet in powder-coated sheet metal. |
D | Space for distribution cards. |
E | Power supply. |
F | Cable entries. |
G | Motherboard. |
H | Lockable door. |
I | Space for batteries. |
Enclosures
General assembly instructions
Mounting - wall mounting
Enclosure must be mounted vertically.
For good ventilation, at least 100 mm of free space should be provided above and on the sides of the enclosure. Do not block the flow of air on the sides
The device should be mounted at a comfortable working height, normally between 1.4 and 1.8 m.
Recommended distance between screw head and wall should be 1.5-2 mm.
Avoid placement in direct sunlight, near heat sources, or in environments with high humidity or dust.
Installation shall be carried out in accordance with the applicable installation rules and by a competent installer.
Indoor mounting in 19" rack
The product should be mounted in a standardized 19" rack or cabinet with sufficient carrying capacity for the weight of the enclosure including batteries.
The device should be mounted at a comfortable working height, normally between 1.4 and 1.8 m.
The device is mounted horizontally in the rack with the included rack ears or corresponding brackets.
Check that the rack posts are properly aligned and that the spacing corresponds to the 19" standard (465—470 mm between the inner edge of the posts).
Use at least two mounting points (on each side) on the rack ears for stable attachment. Recommended screw size is M5 or M6
When assembling, cage nuts or locking washers should be used to ensure that the screws fit securely.
For good ventilation, at least 100 mm of free space should be provided above and below the unit. Do not block the air flow on the front or back.
Batteries should always be placed as directed and must not block ventilation openings or wiring.
Installation shall be carried out in accordance with the applicable installation rules and by a competent installer.
Mounting
Use the appropriate screw for mounting on a wall or in a 19" rack. Screws for mounting on a wall or in a rack are not included.
For wall mounting in concrete, concrete screws must be used. For rack mounting, M6 with basket nut is used
Screw length should be adjusted according to wall material and load. The specified screw length is the minimum allowable length
Bracket
The supplied brackets can be attached in two ways: When mounting on a wall, the brackets must sit backwards, against the wall. When mounting in a 19" rack, the bracket must sit at the front of the unit.
Letter | Explanation |
|---|---|
A | Bracket is pushed in from the bottom up. |
B | Clip clicks in when bracket is pushed in correctly. |
Important
If alarm class 3 (SSF) is to be met, the cabinet and tamper switch must be mounted on the wall. Optional, Cabinet tamper M/L to put a tamper switch on the wall is available.
Batteries - placement and connection
Connecting batteries in FLX M

Note that cards (4) differ from different configurations.
No | Explanation |
|---|---|
1 | Minus coil for battery cable from 4. |
2 | Fuse. |
3 | Plus terminal for battery cable from 4. |
4 | Motherboard, varies with configuration. |
5 | Battery cables are located on the system board. |
6 | Yellow cable, which must be cut when connecting the battery box. |
7 | Connection for connection of battery box. |
PRO3 motherboard
Motherboard - description

The motherboard controls the device and distributes power. See technical data for more information.
No . | On circuit board | Explanation |
|---|---|---|
1 | J24 | Control to power supplies. Internal use. |
2 | J5 | 1=Oprio 2=external alarm. |
3 | D9 | LED. |
4 | JU1 | For external LED in door. |
5 | J11 | Reset jumper, used when changing batteries. |
6 | JU6 | Connection for relay cards or communication cards or for updating firmware. Only one card or contact at a time can fit. |
7 | J29 | Connection to fan. |
8 | J101 | Connection to tamper contact. |
9 | J17 | Connection to tamper switch from battery box. |
10 | J35 | Not used. |
11 | J14 | Alarm input from external battery fuse, from battery box. |
12 and 13 | J10 and J100 | Alarm from external option card. |
14 | D18, D19 | LEDs show the status of communication (RS-485). |
15 | S3 | Dip switch |
16 | P2:1-4 | Load outputs |
17 | P3:1-3 | Communication connection, RS-485. |
18 | P1:1-3 | Connection to the mains. |
Fuses
Fuse | Type | Explanation |
|---|---|---|
F1 | T2.5A | Mains fuse |
F3 | T16A | Load fuse 1 - (for P2:2) |
F4 | T16A | Battery fuse |
F5 | T3A-T10A* | Load fuse 1+ (for P2: 1) |
F7 | T3A-T10A* | Load fuse 2 + (for P2:3) |
*The size of the fuse depends on the battery backup (rated) power outlet (A) . | ||
Warning for replacing fuses (current strength, A)
There is a risk of damage if the fuse is changed to a larger one than what the unit is delivered with. The function of the fuse is to protect the connected load and cables against damage and fire. It is not possible to change the fuse to a larger one to increase the power output.
Connect load
Max current
The maximum current must not be exceeded. Max current is indicated on the rating plate on the device.
Load outputs when SSF certified
In order for certificates to be maintained, only one load output must be used.
If there are one or more connection cards (to increase the number of load outputs), load must be connected there and not on the main board.
On circuit boards | Explanation |
|---|---|
P2: 1 | Connection for load 1 +. |
P2: 2 | Hookup for load 1 -. |
P2: 3 | Connection for load 2 + |
P2: 4 | Connection for load 2 - |
Connect the mains to the motherboard (PCB)
Connect mains
Pull wiring through the cable entry on the cabinet.
Before connecting, the supply circuit should be disconnected and voltage-free. Verify that the conductor area and cable type meet the applicable installation rules and that the strain relief and insulation levels comply with the requirements for 230 V AC
After connection, all screw connections should be checked and tightened. Tensioning shall only take place after mechanical protection, caps and housing have been reassembled and comply with the contact protection according to EN 62368-1
Secure F and N with cable ties.
Important
Protective earth (PE) must be connected to the PE terminal on the motherboard. The motherboard is grounded via its mounting points in the enclosure, ensuring proper potential equalization between PCB and enclosure. Also the cover is grounded through ground cable/earth braid between cover and enclosure to maintain continuity and EMC
Mains wiring must be kept separate from other wiring to avoid EMC interference.
The protective earth (PE) must be connected to the PE terminal on the motherboard. The motherboard is grounded via its mounting points in the enclosure, ensuring correct equipotential bonding between the circuit board and the enclosure. The cover is also grounded via a grounding cable / grounding braid between the cover and the enclosure to maintain continuity and EMC function.
Check that the marking on the circuit board matches the wiring order on the terminal block.

Connect the mains cable to the terminal block before it is re-inserted into the motherboard. Secure L (F in picture) and N with cable ties for electrical safety.
Letter | Explanation |
|---|---|
L | Fas, P 1:1. |
N | Neutral, P 1:2. |
PE | Proctected earth, P 1:3. |
Filter Capacitors
The products are supplied with the following filter capacitors for standard networks (TN/TT):
Type | Location |
|---|---|
X2 | Phase — Zero (L—N) |
Y2 | Phase/Zero — Protective ground (one per conductor) |
IT Networking
IT networks generate higher transients as the system works phase to phase. Therefore, according to the current standard, capacitors of a higher class are required
Departure from X1/Y1 capacitors can be done but then external transient protection must be installed. For devices to be installed in IT networks, Milleteknik's lightning protection must be fitted to maintain standards.
Dip switch 1-8
Dip-Switch has several different modes:
Dip switch | In mains operation or in battery operation |
|---|---|
1 | Address for external communication. |
2 | Address for external communication |
3 | Address for external communication |
4 | Address for external communication |
5 | Sets alarm for mains failure delay |
6 | Sets alarm for mains failure delay |
7 | Sets alarm limit for low battery voltage in battery operation. |
8 | Turns off or turns on LED indication, for everything except alarm in case of triggered tamper contact which is always indicated regardless of dip-switch position. |
8 in sequence | Perform battery tests. |
Address setting for external communication (Dip switch 1-4)
Dip-Switch S1: 1-4 sets addressing.
Dip: 1 | Dip: 2 | Dip: 3 | Dip:4 | |
|---|---|---|---|---|
Adress 1 | ON | OFF | OFF | OFF |
Adress 2 | OFF | ON | OFF | OFF |
Adress 3 | ON | ON | OFF | OFF |
Adress 4 | OFF | OFF | ON | OFF |
Adress 5 | ON | OFF | ON | OFF |
Adress 6 | OFF | ON | ON | OFF |
Adress 7 | ON | ON | ON | OFF |
Adress 8 | OFF | OFF | OFF | ON |
Adress 9 | ON | OFF | OFF | ON |
Adress 10 | OFF | ON | OFF | ON |
Adress 11 | ON | ON | OFF | ON |
Adress 12 | OFF | OFF | ON | ON |
Adress 13 | ON | OFF | ON | ON |
Adress 14 | OFF | ON | ON | ON |
Adress 15 | ON | ON | ON | ON |
Mains failure delay (dip 5-6)
It is possible to change the time for when the alarm for a power outage should be given. Use the matrix to set the alarm.
Alarms for mains failure are given after: | Dip 5 | Dip 6 |
|---|---|---|
3 seconds | OFF | OFF |
30 minutes | ON | OFF |
60 minutes | OFF | ON |
240 minutes (4 hours) | ON | ON |
Low battery voltage (dip 7)
Dip: 7 has the same function regardless of whether the unit is in mains or battery operation or whether the tamper switch is held down.
Alarm for low battery voltage is given when | Dip 7 |
|---|---|
22,8 V* | ON |
24 V | OFF |
*25% of battery capacity remains. | |
LED (dip 8)
LED/battery-test always lights up when the door is open.
Dip-switch 8=ON turns off the LED.
Dip-switch 8=OFF turns on the LED.
Battery test (dip 8)
To do a battery test, dip 8 needs to change position and five seconds need to pass before the test is initiated.
If dip 8 in original position is on OFF then switch dip 8 to: ON (wait 5 seconds) and then switch back to OFF.
If dip 8 in original position is on ON then switch dip 8 to: OFF (wait 5 seconds) and then switch back to ON.
This activates the battery test after 3-8 seconds. The battery test lasts for about 6 seconds and then the LED flashes yellow quickly. Aged battery alarms may be indicated while the battery test is being performed.
Only reset dip 8 when the test is complete.
Reboot to confirm changes in address, battery and alarm settings to parent system
After the dip-switch has been set for various parameters, the device's software needs to be restarted. This is for the new settings to be stored and take effect.
Important
Rebooting according to this procedure does not interrupt the output voltage.
Restarting the device software is done by jumpering J11 (PRO3)
In the event of a change of address, the card should be reset once more after 20-30 seconds.
Important
Reboot must be done every time a change is made to the device.
NEO cannot be connected to communication/UC.
Reset after battery replacement -PRO3
After battery replacement, the device needs to measure the capacity of new batteries and clear previously set battery capacity. All alarms are cleared from the units memory, statistics remains and can not be cleared.
Insert jumper on J11 and remove jumper on J11
After doing step, the battery capacity is cleared in the units memory and is ready to read the new battery capacity.
This procedure needs to be done each time the batteries are replaced or when connecting a battery box.
Note on test of batteries
At start-up, it takes 72 hours before the system performs battery tests. This is to ensure fully charged batteries and to collect averages / history for at least 72 hours. Thereafter, every four hours, a qualified cell sample of the batteries is performed.
Note on start-up with short-circuited batteries
Peak current at start-up with short-circuited batteries: Up to 30 A p-p for 200 ms. Always follow the start-up procedure.
Card Description - Relay Card NOVA Series (PRO3)
Relay card - description, connections and alarm outputs.
All fault arm relays must be in the drawn state. Check that there is a gap between CO and NC. Put the measuring instrument on continuity measurement and test closure. This should then indicate a short circuit.
All relay outputs are normally live and give an alarm in the event of no voltage.
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No . | Terminal no. | The relay is normally energized. | Alarm type / explanation |
|---|---|---|---|
1.1...1.4 | P4:1 | - | GND, protective earth |
P4:2 | - | RX | |
P4:3 | - | TX | |
P4:4 | - | +5V | |
2 | JU5 | - | Connection to motherboard. |
3 | D2-D6 | - | Indicator diode, lit green when OK. |
4 | P5:10-12 | NC, COM, NO | Alarm from tamper switch, (optional for NEO and EN54). |
5 | P5:7-9 | NC, COM, NO | Low system voltage. |
6 | P5:4-6 | NC, COM, NO | Alarm for fuse failure, charger failure overvoltage, charger failure undervoltage, battery not connected, low battery voltage in case of mains failure and aged battery*. *NOVA only. |
7 | P5:1-3 | NC, COM, NO | Mains failure alarm. |
Multiple units into one parent system
To connect several units to a higher system, the load-minus between several battery backups must be connected together.
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Commissioning - how to start the unit
Connect in this order
To minimize the risk of short-circuit errors, connect the components to the motherboard in the following order.

Nr | Explanation |
|---|---|
1 | Connect alarm. |
2 | Connect load. |
3 | Connect batteries |
4 | Connect mains. |
Important
For setting dip switches and addressing — see online manual via QR code.
connect load, alarm and possibly. other connections.
Connect batteries
Connect / switch on fuses
Screw the mains cable into the terminal block and attach the terminal block to the motherboard.
Switch on mains voltage.
The unit works normally when the indicator LED on the outside of the cabinet door lights up with a solid green light. See front panel for other status indications.
It may take up to 72 hours for the batteries to be fully charged.
System test
Test the connected device by performing a system test afterwards commissioning.
Important
Let the batteries charge for a couple of hours, use a multimeter to measure the voltage on each battery. The voltage must be at least 12.7 V per battery.
Switch on incoming mains voltage.
Indicator LED on the outside of the cabinet door lights up with a solid green light. Disconnect the mains voltage to check that the unit is operating in battery mode and alarms.
LED on the cabinet door indicates, see panel for alarm type.
Switch on incoming mains voltage. Indicator LED, on the outside of the cabinet door, lights up with a solid green light. Normal operation.
Recovery
Reset the unit by completely de-energizing the unit.
Disconnect battery wiring and mains voltage and reconnect after 5 seconds.
Alarm displayed on cabinet door
In normal mode, the indicator LED shows a solid green light.
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The indicator diode (LED) shows | Explanation |
|---|---|
Solid green light | Normal operation. |
Slow green flashes | Sabotage alarm. |
Fast green flashes | Mains failure. |
Solid amber light | Low battery voltage. |
Slow amber flashes | Aged batteries. |
Rapid amber flashes | Disconnected batteries or battery cell shortage. |
Solid red light | Overvoltage or undervoltage or charger fault. |
Slow red flashes | Low system voltage. |
Rapid red flashes | Blown load or battery fuse has blown. |
No light / off | Deep discharge protection is activated. (System shutdown). |
When operating system: If the indicator LED is off, deep discharge protection has been activated.
Notice
If the indicator light flashes every 15 seconds, the battery is fully charged and the charge is in rest phase to extend battery life. In the event of a power failure during the rest phase, the battery backup switches to battery operation as usual
Adjustment of tamper switch
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The tamper switch lever must be in the closed position when the cabinet door is closed. If the alarm goes off ("tamper alarm"), the lever may needs to be adjusted.
The lever is adjusted by the following steps:
Pinch with pliers in the middle of the lever.
Carefully adjust the lever in the desired direction (up / down).
Check by closing the door. A click is heard when the contact is closed.
Notice
Tamper switch will not give an alarm when closed and locked the door.
Maintenance
The system with the exception of batteries is maintenance-free when installed in an indoor environment.
Inspect the fan annually. The fan should rotate smoothly without any noise. Clean the fan from dust and dirt. The fan must be replaced if it does not rotate smoothly or is so dirty that it cannot be completely cleaned. If the fan does not work well, the air flow in the unit will be obstructed, whichcauses heat to build up inside the enclosure, which can lead to reduced battery capacity and to a significantly shorter battery replacement interval.
About batteries
Batteries generate electricity through a chemical process and there is thus a natural degradation of capacity. The biggest factor in battery life is temperature. The higher the temperature, the shorter the battery life. The date of manufacture stamped on the battery and the service life (as stated by the battery manufacturer). An ideal temperature is 20 °C both in operation and in storage. Higher ambient temperature greatly reduces the service life. Thus, actual lifespan varies when used. Batteries should be replaced after half specified (from the battery manufacturer) lifetime for safe operation. Batteries purchased through the manufacturer of the battery backup have a lifespan (from the battery manufacturer) of between 10-12 years with recommended replacement after 5-6 years.

battery change
If possible, disconnect mains (voltage) when replacing the battery.
Disconnect battery cables. Note how battery cables are mounted before removing them.
Remove battery fuse between batteries.
Insert and fasten the new batteries.
Connect the battery cables in the same way as before.
Connect battery fuse between batteries.
Switch on mains voltage. The indicator LED may not be green (up to 72 hours), until the batteries are charged.
Test the system by briefly disconnecting the mains voltage, (= the load is driven by the batteries), and then switch on the mains voltage again.
Battery recycling
All batteries must be recycled. Return to manufacturer or return to recycling station.

Safety Information - Service and Troubleshooting
If possible, disconnect the mains supply before starting any work, such as servicing, battery replacement, metering or troubleshooting.
Remove the battery fuse/plug before working on the DC side.
Check that all cables are properly connected and grounded before re-energizing the unit.
The product may contain components that become hot during operation. Avoid touching internal parts immediately after the power has been switched off.
If fuses blow repeatedly see Troubleshooting or disconnect the unit and contact Milleteknik technical support.
In case of suspicion of damage, liquid ingress or burnt odour, the product must not be used until it has been inspected by qualified personnel.
During operation, the housing should be closed and locked (if the device has a lock).
Only authorized service personnel may perform repairs on the device.
Use only original fuses and batteries of the same type and value as specified in the manual/product sheet.
Milleteknik is not responsible for damage caused by improper handling, modification or unapproved components.
Troubleshooting
If the device does not work as expected, go through the following checks:
Problem | Possible cause | Action |
|---|---|---|
No output voltage. | No mains voltage, fuse triggered or battery failure. | Check the supply, fuses and battery connections. |
Battery does not charge. | Faulty battery connection or battery fuse has blown. | Check battery cables and replace battery fuse if necessary. |
The device starts but alarms. | Batteries not sufficiently charged or faulty load or battery. | Wait 72 hours until the batteries are fully charged. Ensure that the connected load does not exceed the rated current. |
LED flashes. | Information, warning or error. | See panel or manual for explanation. |
Fuses blow frequently. | Short circuit or overload. | Check connected devices, change the fuse only after the cause has been resolved. |
Unit overheating | High load or insufficient ventilation | Check that the rated current is not exceeded and ensure adequate ventilation around the enclosure. |
Control measurement of batteries
In case of troubleshooting, the voltage of the batteries can be checked using a multimeter. Measure each 12V battery separately over the plus and minus pole. Next, measure the entire battery group connected in series. Two 12 V batteries connected in series should provide approximately 24-27 V DC depending on the degree of charge and whether charging is in progress. If measured voltage is significantly lower than expected, check polarity, battery fuse and wiring between battery box and battery backup.
If the problem persists after these checks, contact Milleteknik support and provide the product name, serial number, and a brief description of the fault.
Connection of battery box
Connection to batterybox

The picture also gives an overview of connection points for battery cables and battery fuses.
Battery cables | Explanation |
|---|---|
B1+ | Connects to fuse . |
B1- | Cable from motherboard is connected to battery . |
B2+ | Cable from motherboard is connected to battery . |
B2- | Connects to fuse . |
B3+ | Connects to fuse . |
B3- | Connected via connector to battery in battery backup . |
B4+ | Connected via connector to battery in battery backup . |
B4- | Connects to fuse . |
Number | Explanation |
|---|---|
1 | Battery fuse. |
2 | Connect battery backup and battery box with white square connector. |
Wiring diagram and jumper
Alarms for tamper contact are connected in series and therefore the loop must be unbroken to the last battery box wiring. Jumper closes the loop on each wiring that goes from battery backup to battery box and in order for an alarm to be given on the tamper connector in the battery box, a yellow jumper on wiring must be cut. Do not cut the jumper on the last wiring in the battery box, as sabotage alarms will not be given in any connected battery backup or battery box.


Number | Explanation |
|---|---|
1 | IN - incoming connection |
2 | OUT - outgoing connection |
3 | Jumper on base on outgoing connection |
Devices | Yellow jumper - where to cut / not cut | Where the end of the loop should be |
|---|---|---|
Battery backup without battery box | Do not cut the jumper | Jumper should remain in battery backup |
Battery backup + 1 battery box | Cut jumper from battery backup | Jumper must remain in battery box 1 |
Battery backup + 2 battery boxes | Cut jumper in battery backup and from battery box 1 | Jumper must remain in battery box 2 |
Battery backup (NOVA FLX) with 4 battery boxes (NOVA FLX)

Tamper switch when using battery box(-es)
If one or more battery boxes have been connected to the unit, the tamper switch must be connected in series in order for alarms from all units to be given. It is important that the series connection ends at the last tamper contact. The series connection must start in the battery backup unit and return to the last battery box.
All tamper contacts must be in series for everyone to be part of the alarm chain. Therefore, the yellow cable that is in the jackable connector must be cut on all connecting cables, except the last on. The cable must not be cut on the last connection / battery box.
Product sheet - power supply / battery backup
Product Sheet
SSF1014 certified battery backup with communication
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NOVA FLX M can be mounted on a wall or in a 19" rack.
Item Information
The table shows the name, part number and email number of the product
Product Identification
Product designation | Article number | E-number (SE) |
|---|---|---|
NOVA 24V 10A FLX M | FM01P30024P100-SSF | 52 135 66 |
Technical description
NOVA powers access control systems, alarm systems or other security products in a property powered by 12 V or 24 V DC. The rectifier in the power supply converts 230 V AC down to 12 V DC or 24 V DC. NOVA 24 V power supply is certified for use in security installations that must comply with SSF 1014, all the way from alarm class 1 up to alarm
Batteries, for example, drive the access system further when the power grid goes down.
Quick Facts | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Supply voltage (V) | 230V AC, +/- 10%, 47Hz- 63Hz | ||||||||||||||||||||||||||||||||||||||||||||||||
Voltage out (V) | 27.3 V DC, (24 V DC) Also applicable in battery operation. | ||||||||||||||||||||||||||||||||||||||||||||||||
Current output (A), max load current output. | 10A | ||||||||||||||||||||||||||||||||||||||||||||||||
Batteries[a] | 2 x 20 Ah | ||||||||||||||||||||||||||||||||||||||||||||||||
[a] Recommended. If batteries are included, it is indicated, otherwise batteries are ordered separately | |||||||||||||||||||||||||||||||||||||||||||||||||
Areas of application
Areas of application | Yes | No |
|---|---|---|
Access system (door reader, magnetic lock, electric terminal plate, etc) | ✔ | |
PowerWatch compatible | ✔ | |
Burglar alarm | ✔ | |
SSF certified access systems. Alarm class 1-4 | ✔ | |
Communication to subcentral. | ✔ |
Electrical data
Electrical data | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Supply voltage | 230V AC, +/- 10%, 47Hz- 63Hz | ||||||||||||||||||||||||||||||||||||||||||||||||
Charge current | Max 10A | ||||||||||||||||||||||||||||||||||||||||||||||||
Efficiency[a] | 87% | ||||||||||||||||||||||||||||||||||||||||||||||||
Standby consumption | 3.38 W | ||||||||||||||||||||||||||||||||||||||||||||||||
Voltage out | 27.3 V DC, (24 V DC) Also applicable in battery operation. | ||||||||||||||||||||||||||||||||||||||||||||||||
Current (A)[b] | 10A | ||||||||||||||||||||||||||||||||||||||||||||||||
[a] At rated load. [b] Power outlet/load is specified as max, normal current output should be 80% of max. | |||||||||||||||||||||||||||||||||||||||||||||||||
Fuses | |
|---|---|
Mains fuse | 2.5 A |
Load fuses | 10A |
Battery fuse | 16 A (on motherboard) and 30 A (fuse between batteries) |
Circuit Boards | Internal power consumption (during battery operation) | Other. info |
|---|---|---|
PRO3 | < 120 mA | All relays on external alarm board pulled in normal mode. |
Load outputs
Alarm and protection
Alarms | Alarm via communication[a] | Indication diode on main board and LED on door. | |||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Network outage | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Fuse failure | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Sabotage Breakers | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Fan failure | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Charger failure, overvoltage | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Charger failure, undervoltage | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Cell failure or not connected battery | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Low system voltage, (system voltage below 24.0 V in mains operation). | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Low battery voltage (<24.0 V DC) or power failure | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Over-temperature | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Sub-temperature | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Short battery life remaining | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Aged battery | ✔ | ✔ | |||||||||||||||||||||||||||||||||||||||||||||||
Overcurrent 80%, daily average | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Overcurrent 100%, minute average | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Over current 175%, second average | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
[a] Applies to communication against the parent system, active only if configuration allows. | |||||||||||||||||||||||||||||||||||||||||||||||||
Alarms[a] | Relay 1/Alarm output 1 | Relay 2/Alarm Output 2 | Relay 3/Alarm output 3 | Relay 4/Alarm output 4 | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Network outage | ✔ | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Fuse failure | - | ✔ | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Sabotage Breakers | - | - | - | ✔ | |||||||||||||||||||||||||||||||||||||||||||||
Fan failure | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Charger failure, overvoltage | - | ✔ | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Charger failure, undervoltage | - | ✔ | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Cell failure or not connected battery | - | ✔ | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Low system voltage, (system voltage below 24.0 V in mains operation). | - | - | ✔ | - | |||||||||||||||||||||||||||||||||||||||||||||
Low battery voltage (<24.0 V DC) or power failure | - | ✔ | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Over-temperature | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Sub-temperature | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Sub-temperature | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Short battery life remaining | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Aged Battery** | - | ✔ | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Overcurrent 80%, daily average | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Overcurrent 100%, minute average | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
Over current 175%, second average | - | - | - | - | |||||||||||||||||||||||||||||||||||||||||||||
[a] Alarm on potential-free relay contact. | |||||||||||||||||||||||||||||||||||||||||||||||||
Alarm and protection | Yes | No | |||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Battery charge protection/controlled charging[a] | ✔ Batteries are charged with a maximum of 0.5 A.[b] | ||||||||||||||||||||||||||||||||||||||||||||||||
✔ | |||||||||||||||||||||||||||||||||||||||||||||||||
Overload Protection/Surge Protection | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Over-temperature protection | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
Short circuit protection | ✔ | ||||||||||||||||||||||||||||||||||||||||||||||||
[a] Controlled charging protects and extends battery life. [b] Factory setting. Adjustable in PowerWatch [c] When the deep discharge protection is activated, the device turns off and the LED goes out. | |||||||||||||||||||||||||||||||||||||||||||||||||
Communication and Indications

The PowerWatch is available as an option for the product.
Interfaces | Included/optional | Signal Type/Communication Principle | Protocols | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
RS-485[a] | Included | Differential signaling | OSDP | ||||||||||||||||||||||||||||||||||||||||||||||
RS-232 | Optional | Serial communication (TTL level) | Proprietary protocol | ||||||||||||||||||||||||||||||||||||||||||||||
Ethernet | Optional | Packet-based (Ethernet) | TCP/IP | ||||||||||||||||||||||||||||||||||||||||||||||
In! 2C | Optional | Two-wire bus | In! 2C | ||||||||||||||||||||||||||||||||||||||||||||||
[a] For other brands, the communication interface of the respective manufacturer applies. | |||||||||||||||||||||||||||||||||||||||||||||||||
Battery
Battery | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ref. Batteries[a] | 2 x 20 Ah | ||||||||||||||||||||||||||||||||||||||||||||||||
Battery type | Maintenance-free AGM (lead-acid) batteries | ||||||||||||||||||||||||||||||||||||||||||||||||
Deep discharge protection | Activates when the system voltage drops below about 20 V DC. | ||||||||||||||||||||||||||||||||||||||||||||||||
Other sizes of batteries that can be used | Other batteries may not be used if certificates are to be maintained. | ||||||||||||||||||||||||||||||||||||||||||||||||
[a] If batteries are included, it is indicated, otherwise batteries are ordered separately. | |||||||||||||||||||||||||||||||||||||||||||||||||
Enclosure and Mechanics
Enclosure and Mechanics | |
|---|---|
Type | Universal enclosure for wall and rack |
IP class | IP32 |
Material | Powder coated sheet metal. |
Colour | Black |
Height units | 5 |
Cable grommets | 4 pcs |
Knockout hole | 1 pc. on the back |
Lock | ✔ 2 keys included |
Fan in enclosure | ✔✘ |
Assembly, installation and eligibility requirements
Fitting | Yes | No |
|---|---|---|
19" rack. | ✔ | |
Wall. | ✔ |
Installation | Yes | No |
|---|---|---|
Fixed installation. | ✔ |
Dimensions, weight and packaging information
Net weight | Weight with packaging |
|---|---|
12.7 kg | 13.8 kg |
Packaging | |
|---|---|
Packaging | Cardboard and impact protection in cardboard. |
Quantity in pack | 1 pc. |
Packaging Type (GS1 T0137) | BX box. |
Conditions EUR pallet | EUR pallets may not be stacked during transport or storage. Stacking may result in damage to product and packaging |
Transport environment | The product must be protected from condensation and direct precipitation during transportation. |
Transport temperature (without battery) | −30 °C to +70 °C |
Storage environment | Dry indoor environment, protected from condensation. Relative humidity: max 95%, non-condensing |
Storage temperature without batteries | −20 °C to +60 °C |
Contact
Department | |
|---|---|
Switchboard | 031-340 02 30 |
Support and technical issues | support@milleteknik.se |
Sales | sales@milleteknik.se |
WWW | www.milleteknik.se |
Address | Ögärdesvägen 8B, 433 30 Partille |
About this information
All information is published subject to possible errors. Information is updated without prior notice. Milleteknik with the associated logo is a trademark of Milleteknik AB. PowerWatch is a trademark of Milleteknik AB. |
Publication date 2026-07-08
Compliance and regulatory compliance
Delivery time, warranty and terms
Delivery time, warranty and terms | |||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Warranty period[a] | The product has a two (2) year warranty against manufacturing defects.The product has a five (5) year warranty against manufacturing defects. | ||||||||||||||||||||||||||||||||||||||||||||||||
Special warranty conditions | The battery backup should be used in conjunction with UPLUS 10+ Design Life batteries. The fan shall be cleaned annually and replaced if necessary., The average load shall not exceed 80% of the rated capacity of the power supply. Ambient temperature shall not exceed 32°C. Batteries and wear parts are not covered by warranty.See also general terms and conditions. | ||||||||||||||||||||||||||||||||||||||||||||||||
General Terms and Conditions | ALEM09 with exceptions, see: www.milleteknik.se/conditions/ | ||||||||||||||||||||||||||||||||||||||||||||||||
Support | Telephone support and email support during the warranty period are free of charge. For spare parts that are not covered by warranty, there is a charge | ||||||||||||||||||||||||||||||||||||||||||||||||
Delivery and stock | |||||||||||||||||||||||||||||||||||||||||||||||||
Delivery time[b] | 5 working days. Or as per agreement. Delivery from factory, transportation time is added. | ||||||||||||||||||||||||||||||||||||||||||||||||
[a] If the device is purchased through a wholesaler or other supplier, other warranty conditions may apply [b] In the case of larger orders, delivery time increases, acc. to agreement. | |||||||||||||||||||||||||||||||||||||||||||||||||
Operation and maintenance
Operation | Data | Other. info | |||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Environment | Indoor environmental class 1. | ||||||||||||||||||||||||||||||||||||||||||||||||
Operating temperature (recommended) | +15°C to +25°C | For the best battery life. Higher temperatures significantly shorten the life of the batteries. | |||||||||||||||||||||||||||||||||||||||||||||||
Operating temperature (permissible)[a] | +5°C to +40°C | Class 1 according to EN 50131-6/ EN 60839-11 | |||||||||||||||||||||||||||||||||||||||||||||||
Load, power supply | 80% | Average load shall not exceed 80% of the rated capacity of the power supply. | |||||||||||||||||||||||||||||||||||||||||||||||
Ventilation, free distance around the enclosure. | 100 mm | Ventilation openings must not be blocked or covered. | |||||||||||||||||||||||||||||||||||||||||||||||
[a] Specifies the permissible ambient temperature range in which the product can operate without damage. See also table on battery life. | |||||||||||||||||||||||||||||||||||||||||||||||||
Yes | No | Interval | Other. info |
|---|---|---|---|
✔ | Annually | The fan should be cleaned annually. Battery terminal voltage must be measured. Ensure that the average load does not exceed 80% of the rated capacity of the power supply. |
Certifications and approvals
Complies with | Directives |
|---|---|
Emissions | EN61000-6-:2001 EN 55022:1998: -A 1:2000, A 2:2003 Class B, EN61000-3-2:2001, EN 55032 (replaces EN 55022) |
C.E. | CE marking according to Regulation (EC) No 765/2008 |
RoHS | RoHS Directive 2011/65/EU, including amendment (EU) 2015/863 |
EMC | EMC Directive 2014/30/EU |
Complies with | Yes | No |
|---|---|---|
SBF 110:8 | ✔ |
Certificate number, report number | Designation in test report |
|---|---|
Nos. 20-117 | NOVA 27 50-FLX S • NOVA 27 100-FLX S • NOVA 27 50-FLX M • NOVA 27 100-FLX M • NOVA 27 150-FLX M • NOVA 27 250-FLX M • NOVA 27 50-FLX L • NOVA 27 50-FLX L • NOVA 27 100-FLX L • NOVA 27 150-FLX L • NOVA 27 250-FLX L • UNISON Facility Cabinet |
How do certificates apply if optional is installed in the device?
Environmental data
Environmental data | J/N | Informație | Other. info. | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Building Product Declaration (BPD) | ✔ | Yes, see iBvd at www.milleteknik.se. | - | ||||||||||||||||||||||||||||||||||||||||||||||
REACH Information Obligation (EC) No 1907/2006 | ✔ | Yes, see the DoC at www.milleteknik.se The product complies with REACH Regulation (EC) No 1907/2006. | If empty, the product is not covered. | ||||||||||||||||||||||||||||||||||||||||||||||
SVHC substances, CAS/EC | ✔ | Yes, lead, 7439-92-1/231-100-4 | For text, see iBvd at www.milleteknik.se. If blank, substance is missing. | ||||||||||||||||||||||||||||||||||||||||||||||
Subject to the RoHS Directive, (EU) 2015/863) | ✔ | Yes, see the DoC at www.milleteknik.se | |||||||||||||||||||||||||||||||||||||||||||||||
WEEE 2012/19/EU | ✔ | The product contains electrical components or wiring and is covered by the WEEE Directive (2012/19/EU). | If empty, the product is not covered. End-of-life products must be returned to a recycling centre | ||||||||||||||||||||||||||||||||||||||||||||||
Battery Regulation (EU) 2023/1542 | ✗ | ||||||||||||||||||||||||||||||||||||||||||||||||
SCIP No 2008/98/EC | ✔ | Yes, registered under the EU Waste Directive where applicable, (2008/98/EC). | If empty, no SCIP number is needed. | ||||||||||||||||||||||||||||||||||||||||||||||
Conflict minerals (EU) 2017/821 | ✗/✗/✗/✗/✔ | No=Gold, Tungsten, Tantalum, Cobalt. Yes=Tin | Tin in solders in printed circuit boards purchased through a Swedish supplier. | ||||||||||||||||||||||||||||||||||||||||||||||
Contains nanomaterials: EC 1272/2008 | ✗ | The product does not contain nanomaterials. | |||||||||||||||||||||||||||||||||||||||||||||||
Ecodesign 2009/125/EC | Milleteknik's products are intended for professional use and are therefore not directly covered by the Ecodesign Regulation (EU 2019/1782). As some components may be covered, we nevertheless disclose relevant information[a], where applicable, to provide our customers with confidence in their choice. | ||||||||||||||||||||||||||||||||||||||||||||||||
Machine Directive 2006/42/EC | The product is part of electrical systems, is subject to the relevant electrical and safety directives and is not a machine according to the Machinery Directive (2006/42/EC). Will be replaced by Machinery Regulation (EU) 2023/1230, which will apply in 2027. | ||||||||||||||||||||||||||||||||||||||||||||||||
The product is designed and constructed for a long service life, which reduces the environmental impact. The life of the product (except wearing parts) depends on, among other things, environmental factors, mainly ambient temperature, unforeseen load on components such as lightning strikes, external impact, handling errors, etc. Products are recycled, simply because they are modular, by being left at the nearest recycling station or sent back to the manufacturer.[b]Contact your distributor for more information. | |||||||||||||||||||||||||||||||||||||||||||||||||
[a] Standby consumption and power. [b] Costs incurred in connection with recycling are not reimbursed. | |||||||||||||||||||||||||||||||||||||||||||||||||


Manufacturer and country of origin
Manufacturer[a] | Milleteknik AB | ||||||||||||||||||||||||||||||||||||||||||||||||
Customs State. Nos. | 85044095[b] | ||||||||||||||||||||||||||||||||||||||||||||||||
Country of origin | Sweden | ||||||||||||||||||||||||||||||||||||||||||||||||
[a] Manufacturer is the trademark indicated on the product, regardless of what is stated in this product sheet. [b] Verify with the Customs Ombud/Customs Service for export/import; alternative classification 85044055 may become applicable if the product is assessed as a battery charger. | |||||||||||||||||||||||||||||||||||||||||||||||||
Appendix
Power outlet NOVA FLX
NOVA 24V 10A FLX M | Unit without battery box | Unit with 1 battery box | Unit with 2 battery boxes | Unit with 3 battery boxes | Unit with 4 battery boxes |
|---|---|---|---|---|---|
Battery | 2 st 20 Ah | 2 st 45 Ah / 2 st 20 Ah + 2 st 45 Ah | 4 st 45 Ah / 2 st 20 Ah + 4 st 45 Ah | 6 st 45 Ah / 2 st 20 Ah + 6 st 45 Ah | 8 st 45 Ah / 2 st 20 Ah + 8 st 45 Ah |
Max battery capacity | 20 Ah | 45 Ah / 65 Ah | 90 Ah / 110 Ah | 135 Ah / 155 Ah | 180 Ah / 200 Ah |
According to. SSF1014, Alarm Class 1-2 | 1.6 A | 3.7 A / 5.3 A | 7.4 A / 9.1 A | 11.2 A / 12.8 A | 14.9 A / 16.6 A |
According to. SSF1014, Alarm Class 3-4 | 0.65 A | 1.5 A / 2.1 A | 3.0 A / 3.6 A | 4.5 A / 5.1 A | 6.0 A / 6.6 A |
Imax A (max discharge current) | 10 A | 10 A | 10 A | 10 A | 10 A |
Imax b (max charging current) | 10 A | 10 A | 10 A | 10 A | 10 A |
Imin is always 0 A. | |||||
Backup operating time on batteries
The reserve operating time in battery operation depends on how large a load is connected to the power supply. If the load varies, as with frequent opening of door locks, the time that batteries can continue to power the security system decreases. To get an estimate of reserve operating times see: www.milleteknik.se/Manualer/FaQ/Reservdrifttider/
Permitted average load according to SSF1014 Alarm class 1-4:
Permitted average load according to SSF1014 Alarm class 1-4: | NOVA 24V 5A FLX M | NOVA 24V 10A FLX M | NOVA 24V 25A FLX M | NOVA 24V 25A FLX L |
|---|---|---|---|---|
FLX M without battery box according to Alarm class 1-2 / 3-4 | 1.6 A / 0.55 A | 1.6 A / 0.55 A | 1.6 A / 0.55 A | 1.6 A / 0.55 A |
Including 1 pc. Battery box FLX M, according to Alarm class 1-2 / 3-4: | 3.7 A / 1.5 A | 3.7 A / 1.5 A | 3.6 A / 1.4 A | 3.6 A / 1.4 A |
Including 2 pcs. Battery box FLX M, according to Alarm class 1-2 / 3-4: | - | 7.4 A / 3A | 7.3 A / 2.9 A | 7.3 A / 2.9 A |
Including 3 pcs. Battery box FLX M, according to Alarm class 1-2 / 3-4: | - | - | 11.1 A / 4.4 A | 11.1 A / 4.4 A |
Including 4 pcs. Battery box FLX M, according to Alarm class 1-2 / 3-4: | - | - | - | 14.8 A / 5.9 A |
Charging current for batteries and battery capacity
The unit reads the connected system load and charges the batteries with available residual current from the power supply. The device performs qualified* battery tests and notifies when batteries need to be replaced. The batteries are charged gently to extend their life and protection is available against overcharging.
12 V / 24 V | Maximum charging current for batteries |
|---|---|
NOVA FLX M | 6 A |
The battery backup has controlled charging ** (controlled charging) which prevents batteries from being overcharged and extends their service life significantly. The NOVA series must be used with AGM batteries.
24 V | Battery capacity | Maximum battery capacity with 1 battery box | Maximum battery capacity with 2 battery boxes | Maximum battery capacity with 3 battery boxes | Maximum battery capacity with 4 battery boxes |
|---|---|---|---|---|---|
NOVA FLX M, 24 V | 20 Ah (2 x 20 Ah | 65 Ah (4 x 20 Ah) | 110 Ah (2 x 20 Ah + 2 x 45 Ah) | 155 Ah (6 x 20 Ah + 2 x 45 Ah) | 200 Ah (2 x 20 Ah + 8 x 45 Ah) |
PowerWatch

Product designation | Item No. | E-number (SE) |
|---|---|---|
PowerWatch | A-OT0000UPG02P2V3P3 | 52 137 06 |
Alarms that can be set in PowerWatch |
|---|
Charger failure, overvoltage |
Charger failure, undervoltage |
Fan failure, (in case of externally connected fan) |
Fuse failure on load |
Low battery voltage, in battery operation |
Power outage, delay 10 seconds |
Unconnected battery |
Unit not calibrated |
Eligibility requirements, installation
Eligibility requirements vary between countries. The table summarizes national requirements for fixed installation and connection of equipment with a plug socket, respectively.
Options on the secondary side of the product, such as 12 V, 24 V or 48 V DC, are connected according to the respective instructions. Work on the network connection of the product shall be carried out in accordance with national eligibility requirements
Permission Requirements for Installation | Fixed installation (230 V) | Plug | Other. info |
|---|---|---|---|
Sweden | ✔ | ✗ | Fixed installation may be performed by technicians but shall be under the responsibility of a qualified installer. (Electrical Safety Act, SS 436 40 00) Plug may be connected without authorization. |
Norway | ✔ | ✔ | Requirements for qualified electricians also for equipment with a plug socket in fixed installations. (NEK 400, DSB |
Finland | ✔ | ✗ | Plug may be connected without authorization. (Tukes, SFS 6000 |
Denmark | ✔ | ✗ | Plug may be connected without authorization. (Safety Board |
Germany | ✔ | ✗ | All fixed installations require a qualified electrician according to VDE 0100. Plug sockets may be connected without authorization, but only by person with basic electrical knowledge (“Elektrotechnisch unterwiesene Person”) |
Reference table: environmental classes according to EN 50130-5 (referred to in EN 50131-6)
Class | Type | Temperature range |
|---|---|---|
Environmental Class 1 | Heated indoors (type office/residence). | +5°C to +40°C |
Environmental Class 2 | Generally indoors (type warehouses/stairwells, not temperature controlled). | -10°C to +40°C |
Environmental class 3 | Protected outdoors. | -25°C to +50°C |
Environmental class 4 | Generally outdoors. | -25°C to +60°C |
Reference table: manufacturer's stated service life and recommended battery replacement
Battery Type (Design Life)[a] | Battery replacement time in normal operation, +20°C. | Replacement during hot operation, +30°C | Replacement during hot operation, +40°C | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3 - 5 years | 2 - 3 years | 1 - 1.5 years | 0.5 - 0.75 years | ||||||||||||||||||||||||||||||||||||||||||||||
6 - 9 years | 5 - 6 years | 2.5 - 3 years | 1.2 - 1.5 years | ||||||||||||||||||||||||||||||||||||||||||||||
10 - 12 years | 6 - 7 years | 3 - 3.5 years | 1.5 - 1.75 years | ||||||||||||||||||||||||||||||||||||||||||||||
15 + years | 10 - 12 years | 5 - 6 years | 2.5 - 3 years | ||||||||||||||||||||||||||||||||||||||||||||||
[a] Valid in case of completely unused battery stored under optimal conditions. | |||||||||||||||||||||||||||||||||||||||||||||||||
Reserve operating times for different alarm classes - overview
Alarm class | Spare operating time in the event of a power failure | Maximum number of hours of battery recharging (80%) |
|---|---|---|
EN54-4 | - | 24 h |
SBF110: 8 | 30 h + 10 min | 24 h |
EN50131-6 grades 1-2 | 12 h | 72 h |
EN50131-6 grade 3 | 24 h | 24 h |
SSF1014 Alarm class 1/2 | 12 h | 72 h |
SSF1014 Alarm class 3/4 | 30 h | 24 h |
The table shows the requirements for backup operating time and recharging of batteries for different alarm classes.
About this information
All information is published subject to possible errors. Information is updated without prior notice. Milleteknik with the associated logo is a trademark of Milleteknik AB. PowerWatch is a trademark of Milleteknik AB. |
Publication date 2026-07-08
[1] Translations in languages other than Swedish are indicative only and not verified. Translation should always be checked against the Swedish original to ensure accurate information














