Pulsar EN54C-LCD Series User manual

USER MANUAL
EN
Edition: 2 from 31.07.2020
Supersedes the edition: 1 from 21.02.2019
Power supplies
EN54C-LCD series
v.1.0
Power supplies for fire alarm systems and
smoke and heat control systems.
Power supply unit for fire systems used in building industry.
Declared performance: Fire safety.
Certificate of constancy of performance: 1438-CPR-0628
Certificate of admittance: 3501/2019
Conformity: EN 54-4:2001+ A1:2004 + A2:2007
EN 12101-10:2007 + AC:2007

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GENERAL SAFETY RULES
Before installation, read the instruction manual to avoid errors that
can damage the device and give you an electric shock.
Before installation, cut off the voltage in the 230 V power-supply circuit.
To switch power off, use an external switch, in which the distance between the contacts
of all poles in the disconnection state is not less than 3mm.
The shock protection circuit shall be done with a particular care: the yellow and green
wire coat of the power cable should be connected to the terminal marked with the
grounding symbol on the PSU enclosure. Operation of the PSU without the properly
made and fully operational shock protection circuit is UNACCEPTABLE! It can cause
damage to the equipment or an electric shock.
Removed batteries should be stored in a designated collection point. Do not reverse
polarity of batteries. Explosion hazard if a battery has been replaced by an incorrect type.
Device should be transported without batteries. This has a direct impact on safety of user
and device.
Installing and connecting the power supply must be carried out without batteries.
When connecting batteries to the power supply, pay particular attention to the correct
polarity. If necessary, it is possible to permanently disconnect the battery from the power
supply systems by removing the FBAT fuse.
The power supply is adapted to be connected to a power distribution network with an
effectively earthed neutral conductor.
Ensure a free, convection air flow around the enclosure. Do not cover the ventilation
openings.

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TABLE OF CONTENTS
1. PSU FEATURES.....................................................................................................................................5
2. FUNCTIONAL REQUIREMENTS OF PSU.......................................................................................6
3. TECHNICAL DESCRIPTION. ............................................................................................................7
3.1. GENERAL DESCRIPTION........................................................................................................................................................7
3.2. BLOCK DIAGRAM.................................................................................................................................................................8
3.3. DESCRIPTION OF COMPONENTS AND POWER SUPPLY TERMINALS.........................................................................................8
4. INSTALLATION..................................................................................................................................11
4.1. REQUIREMENTS. ................................................................................................................................................................11
4.2. INSTALLATION PROCEDURE. ..............................................................................................................................................12
4.3. PROCEDURE FOR CHECKING POWER SUPPLY AT PLACE OF INSTALLATION..........................................................................13
5. FUNCTIONS.........................................................................................................................................14
5.1. TECHNICAL OUTPUTS.........................................................................................................................................................14
5.2. INPUT OF COLLECTIVE FAILURE:EXTI...............................................................................................................................15
5.3. INDICATION OF THE ENCLOSURE OPENING –TAMPER......................................................................................................16
5.4. PSU OVERLOAD.................................................................................................................................................................16
5.5. SHORT-CIRCUIT OF THE PSU OUTPUT. ...............................................................................................................................16
5.6. ADDITIONAL MODULES......................................................................................................................................................16
5.6.1. Extending the number of PSU outputs –EN54C-LB4 and EN54C-LB8 fuse modules.............................................16
5.6.2. Cooperation with electric actuators –EN54C-LS4 and EN54C-LS8 sequential modules. ......................................17
6. RESERVE POWER SUPPLY CIRCUIT...........................................................................................18
6.1. BATTERY DETECTION.........................................................................................................................................................18
6.2. PROTECTION AGAINST SHORT-CIRCUIT OF THE BATTERY TERMINALS................................................................................18
6.3. PROTECTION AGAINST REVERSE BATTERY CONNECTION....................................................................................................18
6.4. DEEP DISCHARGE BATTERY PROTECTION UVP. .................................................................................................................18
6.5. BATTERY TEST...................................................................................................................................................................18
6.6. MEASUREMENT OF THE RESISTANCE OF THE BATTERY CIRCUIT.........................................................................................18
6.7. BATTERY TEMPERATURE MEASUREMENT. .........................................................................................................................18
6.8. STANDBY TIME. .................................................................................................................................................................19
7. LCD DISPLAY –PREVIEW ..............................................................................................................20
7.1. CONTROL PANEL................................................................................................................................................................20
7.2. FIRST RUN OF PSU –LANGUAGE SELECTION SCREEN.........................................................................................................21
7.3. MAIN SCREEN OF LCD.......................................................................................................................................................21
7.4. INFORMATION DISPLAYED ON LCD PANEL. .......................................................................................................................22
7.4.1. Preview menu. ..........................................................................................................................................................22
7.4.2. LCD screen –current parameters ....................................................................................................................22
7.4.3. LCD screen –current failures ..........................................................................................................................23
7.4.4. LCD screen –history of parameters ................................................................................................................24
7.4.5. List of failure codes and information messages. ......................................................................................................25
8. LCD DISPLAY –PSU SETTINGS.....................................................................................................27
8.1. PASSWORD.........................................................................................................................................................................27
8.1.1. Entering the password..............................................................................................................................................27
8.1.2. Changing password..................................................................................................................................................28
8.1.3. Disabling the password............................................................................................................................................28
8.1.4. Resetting passwords. ................................................................................................................................................29
8.1.5. Keyboard lock...........................................................................................................................................................29
8.2. PSU...................................................................................................................................................................................31
8.2.1. Battery test performance. .........................................................................................................................................31
8.2.2. Setting delay time for EPS output indicating 230 V AC power loss. ........................................................................33
8.2.3. Setting communication address –refers to cooperation with the interface..............................................................34
8.2.4. Setting transmission parameters –refers to cooperation with the interface. ...........................................................35
8.3. CONTROL PANEL................................................................................................................................................................36
8.3.1. Setting display language...........................................................................................................................................37

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8.3.2. Setting date...............................................................................................................................................................37
8.3.3. Setting time...............................................................................................................................................................38
8.3.4. Setting backlight mode. ............................................................................................................................................39
8.3.5. Contrast setting. .......................................................................................................................................................40
8.3.6. Blinking light indicating failure ...............................................................................................................................41
9. REMOTE MONITORING (OPTIONS) ............................................................................................42
9.1. ETHERNET NETWORK COMMUNICATION.........................................................................................................................42
9.2. RS485-ETHERNET NETWORK COMMUNICATION.............................................................................................................42
9.3. „POWERSECURITY”WEB APPLICATION..............................................................................................................................44
10. TECHNICAL PARAMETERS.........................................................................................................47
Table 12. Electrical parameters...........................................................................................................................................47
Table 13. Mechanical parameters........................................................................................................................................49
Table 14. Safety of use. ........................................................................................................................................................49
Table 15. Operation parameters. .........................................................................................................................................50
Table 16. Recommended types and sections of installation cables. .....................................................................................50
11. TECHNICAL INSPECTIONS AND MAINTENANCE. ...............................................................51
11.1. BATTERY REPLACEMENT OF LCD PANEL........................................................................................................................51

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1. PSU features.
Compliant with requirements of
EN 54-4:2001+A1:2004+ A2:2007
EN 12101-10:2007+AC:2007 standards
and pt. 12.2 of Regulation of Minister of Interior
and Administration of Republic of Poland of
27.04.2010
27,6 V DC uninterruptible power supply
available versions with 2 A / 3 A / 5 A / 10 A
current efficiencies
available versions with space for 7 Ah –65 Ah
batteries
independently protected outputs AUX1 and
AUX2
high efficiency (up to 89%)
low level of voltage ripple
microprocessor-based automation system
measurement of resistance of battery circuit
automatic temperature-compensated charging
automatic battery test
two-stage battery charging process
accelerated battery charging
monitoring of continuity of battery circuit
monitoring of battery voltage
monitoring of charging and maintenance of
batteries
deep discharge battery protection (UVP)
battery overcharge protection
LoB low battery voltage indication
battery output protection against short-circuit
and reverse connection
output voltage control
fuse monitoring of AUX1 and AUX2 outputs
„SERIAL” communication port with
implemented MODBUS RTU protocol and
TCP/IP –a list of registers is available
cooperation with EN54C-LB4 and EN54C-LB8
fuse modules (optional equipment)
cooperation with EN54C-LS4 and EN54C-LS8
sequential modules (optional equipment)
relay output of collective failure ALARM
EPS relay output indicating 230 V power loss
EXTi input of external failure
protections:
oSCP short-circuit protection
oOLP overload protection
oOVP overvoltage protection
osurge protection
oantisabotage protection –Tamper
closing enclosure –lock
convection cooling (forced only in
EN54C-10AxxLCD)
Warranty –3 years from production date
MOREOVER, IN THE VERSION WITH A LCD
AND ETHERNET COMMUNICATION
optical indication –LCD display
odisplay of electrical parameters, e.g.
voltage, current, resistance of battery circuit
readings
ofailure indication
oPSU settings adjusted from panel’s level
oadjustable delay for 230 V AC power loss
indication
o2 levels of password protected access
ooperation memory of PSU
ofailure memory
oa real-time clock (RTC) with battery backup
remote monitoring
oEthernet communication or RS485 (option)
oembedded PowerSecurity web application
opreview of the operating parameters:
voltages, currents, temperature and
resistance of the battery circuit
oPSU work history chart from a period of
more than 100 days: voltages, currents and
resistance of the battery circuit
obattery operating temperature readings
from period up to 5 years
oevent log of up to 2048 power supply
failures
oSSL email encryption
oremote battery test

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2. Functional requirements of PSU.
The buffer power supplies for fire alarm systems has been designed in accordance with the following
standards:
- EN 54-4:2001+A1:2004+A2:2007 Fire detection and fire alarm systems.
- EN 12101-10:2007+AC:2007 Smoke and heat control systems.
- pt. 12.2 of Regulation of Minister of Interior and Administration of Republic of Poland of 27.04.2010
Functional requirements
Requirements
according to
standards
Power supplies
EN54C series
Two independent power sources
YES
YES
EPS network failure indication
YES
YES
Two independent power supply outputs protected against short-circuit
YES
YES
Temperature-compensated battery charging
YES
YES
Measurement of the resistance of the battery circuit
YES
YES
Low battery indication
YES
YES
Recharging the battery to 80% of the rated capacity within 24 hours
YES
YES
Deep discharge battery protection
YES
YES
Short-circuit protection of battery terminals
YES
YES
Battery fuse failure indication
YES
YES
Charging circuit failure indication
YES
YES
Short-circuit protection
YES
YES
Overload protection
YES
YES
Output of collective failure ALARM
YES
YES
EPS technical output
YES
YES
Low output voltage indication
–
YES
High output voltage indication
–
YES
Indication of power supply failure
–
YES
Overvoltage protection
–
YES
Input of an external failure indication EXTi
–
YES
Remote battery test
–
YES
Optical indication –LCD panel
–
YES
Tamper indicating enclosure opening
–
YES

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3. Technical description.
3.1. General description.
The buffer power supplies has been designed for an uninterrupted supply of fire alarm systems, smoke and
heat control systems, fire protection equipment and fire automatics requiring stabilized voltage of 24 V DC (±15%).
The power supplies are fitted with two independently protected AUX1 and AUX2 outputs, which provide a voltage
of 27,6 V DC and the total current efficiency depending on the version:
Power supply model
Battery
Continuous operation
Imax a
Instantaneous operation
Imax b
EN54C-2A7LCD
EN54C-2A17LCD
7 Ah
1,6 A
2 A
17 Ah
1,2 A
EN54C-3A7LCD
EN54C-3A17LCD
EN54C-3A28LCD
7 Ah
2,6 A
3 A
17 Ah
2,2 A
28 Ah
1,8 A
EN54C-5A7LCD
EN54C-5A17LCD
EN54C-5A28LCD
EN54C-5A40LCD
EN54C-5A65LCD
7 Ah
4,6 A
5 A
17 Ah
4,2 A
28 Ah
3,8 A
40 Ah
3,2 A
65 Ah
2,4 A
EN54C-10A17LCD
EN54C-10A28LCD
EN54C-10A40LCD
EN54C-10A65LCD
17 Ah
9,2 A
10 A
28 Ah
8,8 A
40 Ah
8,2 A
65 Ah
7,4 A
In case of power loss, the PSU switches to battery power, providing uninterruptible power supply.
The power supply unit is housed in a metal enclosure (color red RAL 3001) with space for battery.
Power supply units works with maintenance-free lead acid batteries made with AGM technology or gel
technology.

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3.2. Block diagram.
The power supplies has been manufactured based on a high-efficiency system of AC/DC converter.
Applied microprocessor circuit is responsible for the full diagnostics of the PSU parameters and batteries.
The figure below shows a flowchart of the power supply, along with selected functional blocks which are essential
for the proper functioning of the unit.
Fig. 1. PSU block diagram.
3.3. Description of components and power supply terminals.
Table 1. Elements of PSU (Fig. 2).
Compone
nt No.
Description
230 V supply connector with a terminal for connection of a protective conductor
Terminals:
TEMP –input of the battery temperature sensor
TAMPER –input of the microswitch tamper
Closed input = no indication
Open input = alarm
ALARM –technical output of collective failure of the PSU - relay type
EPS –technical output of AC power failure indication
open = AC power failure
closed = AC power - O.K.
EXTi –external failure input
closed input = no indication
open input = alarm
+BAT- –terminals for connecting the battery
+AUX1- –AUX1 power output ( - AUX=GND)
+AUX2- –AUX2 power output ( - AUX=GND)
CAUTION! In Fig. 2 the set of contacts shows a potential-free status of the relay, which corresponds to power
supply failure.

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Fuses:
FBAT –fuse in the battery circuit,
FAUX1 –fuse in the AUX1 output circuit,
FAUX2 –fuse in the AUX2 output circuit,
The fuse values are given in table 12 –"Electrical parameters".
LEDs –optical indication:
230 V –voltage in the 230 V circuit
APS –battery failure
ALARM –collective failure
AUX1 –AUX1 output voltage (at the AUX1 connector)
AUX2 –AUX2 output voltage (at the AUX2 connector)
Battery temperature sensor
Battery connectors; positive: +BAT = red, negative: - BAT = black
LCD connector
Communication interface connector
Fig. 2. View of power supply module based on EN54C-2A7LCD.

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Table 2. Elements of PSU (Fig. 3).
Component
No.
Description
PSU (tab. 1, Fig. 2)
Battery temperature sensor
Battery connectors; positive: +BAT = red, negative: - BAT = black
Place to install fuse module: INTE-C, INTR-C, INTRE-C
A place for installation of additional modules
TAMPER; microswitch (contacts) of antisabotage protection (NC)
Fitting battery
Embossing for cable gland
Embossings for concealed wires
Lock
Fig. 3. View of power supply based on EN54C-2A7LCD

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4. Installation.
4.1. Requirements.
The PSU is to be mounted by a qualified installer, holding relevant permits and licenses (applicable and
required for a given country) for ~230 V AC in and low-voltage installations.
As the power supply is designed for a continuous operation and is not equipped with a power-
switch, therefore, an appropriate overload protection in the power supply circuit should be provided.
Moreover, the user should be informed how to disconnect the power supply unit from the mains supply (usually by
assigning an appropriate fuse in the fuse box). One switch should only protect one power supply.
The electrical system shall follow valid standards and regulations. The power supply should operate in a vertical
position in order to provide free and convectional air flow through ventilating holes of the casing.
As the PSU cyclically runs a periodic battery test, during which the resistance in the battery circuit is
measured, pay attention to the proper connection of cables to the terminals. Installation cables should be firmly
connected to the battery side terminals and to the power supply connector. If necessary, it is possible to
permanently disconnect the battery from the power supply systems by removing the FBAT fuse.
The side walls of the housing include the embossings, which should be used to carry out installation
cables. Use a blunt instrument to make an opening for cable gland from the outside of the housing.
Then, carefully mount the cable gland, protecting the PSU from water penetration, in the opening.
Fig. 4. The method of forming an opening for cable gland.
The PSU is fitted with PG9 and PG11 cable glands. Gland size should be chosen depending on the cross-
section of the cable. Single cable gland can be used for only one wire.
Fig. 5. Recommended types and sections of installation cables PG9 and PG11 for cable glands.

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4.2. Installation procedure.
CAUTION!
Before installation, cut off the voltage in the 230 V power-supply circuit.
To switch power off, use an external switch, in which the distance between the contacts of
all poles in the disconnection state is not less than 3mm.
It is required to install an installation switch with a nominal current of 6 A in the power supply circuits outside
the power supply unit.
1. Mount the PSU in a selected location with use of special metal expansion bolts. Do not use PVC dowels.
2. Connect the power cables ~230 V AC to the L-N terminals of the PSU. The cable length inside the housing
should not exceed 10 cm. Connect the ground wire to the terminal marked with grounding symbol in
enclosure. Use a three-core cable (with a yellow and green protection wire) to make the connection.
The shock protection circuit shall be done with a particular care: the yellow and green wire
coat of the power cable should be connected to the terminal marked with the grounding
symbol on the PSU enclosure. Operation of the PSU without the properly made and fully
operational shock protection circuit is UNACCEPTABLE! It can cause damage to the equipment or
an electric shock.
3. Connect the receivers’ cables to the AUX1 and AUX2 output terminals on the PSU board.
4. If needed, connect the cables from the devices to the technical inputs and outputs:
–ALARM; technical output of collective failure of the PSU
–EPS; technical output of AC power loss indication
–EXTi; input of collective failure
5. Install the batteries in a designated area of the enclosure (see Fig. 3). Connect
the batteries with the PSU paying special attention to the correct polarity.
Batteries must be connected in series using the special cable (included). Attach
the temperature sensor to any of the batteries with mounting tape (included).
Place the temperature sensor between the batteries.
6. Switch on the ~230 V supply. The corresponding LEDs on the power supply PCB should be ON:
230 V AC green and AUX1, AUX2.
7. Check the current consumption of the receivers, taking into account the battery charging current, so as not
to exceed the total current efficiency of the PSU (see section 3.1).
8. Once the tests are completed, close the enclosure.

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4.3. Procedure for checking power supply at place of installation.
1 Check the indication displayed on the front panel of the power supply unit:
a) The 230 V AC LED should remain lit to indicate the presence of the mains supply
voltage.
b) The LEDs AUX 1 and AUX 2 should remain lit to indicate presence of
supply voltage.
2 Check the output voltage after 230 V power failure.
a) Simulate the lack of 230 V mains voltage by disconnecting the main circuit breaker.
b) The 230 V AC LED should go out.
c) The LEDs AUX 1 and AUX 2 should remain lit to indicate the presence of
output voltage.
d) The LED ALARM LED will start blinking.
e) The EPS technical output and ALARM will change to the opposite status after 10 seconds / 1 min / 10
mins / 30 mins, depending on the “EPS” parameter set in the PSU configuration menu (default setting:
10 seconds).
f) Turn on the 230 V mains voltage again. Indication should return to the initial status from point 1 after a
few seconds.
3 Check whether the lack of continuity in the battery circuit is properly indicated.
a) During normal PSU operation (230 V mains voltage on), disconnect the battery circuit by disconnecting
the FBAT fuse.
b) Within 5 minutes the PSU will start signaling a failure in the battery circuit.
c) The ALARM LED will start blinking.
d) The ALARM technical output will change status into opposite.
e) Turn on the FBAT fuse in the battery circuit again.
i) The power supply should return to normal operation, indicating the initial status, within 5 minutes after
the battery test is completed.

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5. Functions
5.1. Technical outputs.
The power supply is fitted with relay indication outputs changing state upon the occurrence of a specific event.
Fig. 6. Electrical diagram of relay outputs.
EPS –output indicating 230 V power loss.
The output indicates 230 V power loss. Under normal status –with the 230 V supply on, the output is
closed. In case of power failure, the PSU will switch the output into the open position after a time 10s.
(factory settings).
In case of a PSU version with a LCD, this time can be changed from the level of the „EPS Output
Delay” menu (see Section 8.2.2).
1.
Fig. 7. EPS technical output.
CAUTION! In Figure the set of contacts shows a potential-free status of the relay, which corresponds to
power supply failure.
ALARM –technical output of collective failure indication.
Output indicating collective failure. In the case of 230 V power failure, battery circuit failure,
PSU failure, or EXTi input activation, the collective failure signal ALARM will be generated.
Failure can be triggered by the following events:
230V power failure AC
faulty batteries
undercharged batteries
disconnected batteries
high resistance of the battery circuit
no continuity in the battery circuit
UAUX1, AUX2 output voltage below 26 V
UAUX1, AUX2 output voltage over 29,2 V
battery charging circuit failure
blown FAUX1 or FAUX2 fuse
PSU overload
to high battery temperature (>65°C)
temperature sensor failure, t < -20°C or t > 80°C
enclosure opening –TAMPER
internal damage of the PSU
Fig. 8. Technical output ALARM.

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CAUTION! In Figure set of contacts shows a potential-free status of relay, which corresponds to power
supply failure.
5.2. Input of collective failure: EXTi.
The EXTi (external input) technical input indicating collective failure is intended for additional, external
devices that generate the failure signal. Disconnection of the EXTi terminals will cause a failure of the PSU and
generate a failure signal at the ALARM output.
The EXTi technical input is not galvanically isolated from the power supply.The „minus”terminal is
connected to the power supply.
The connection of external devices to the EXTi input is shown in the electrical diagram below.
Relay outputs or „open collector”signal outputs can be used as the signal source.
Fig. 9. Connections to the EXTi input.
The EXTi input has been adjusted to work with EN54C-LB4 and EN54C-LB8 fuse modules generating a
failure signal in case of a fuse fault in any of output sections (see section 5.6). To guarantee a correct cooperation
between the fuse module and the EXTi input, the connections shall be made as presented in the diagram below.
Fig. 10. Example of a connection with fuse module EN54C-LB8.

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5.3. Indication of the enclosure opening –TAMPER.
The PSU is fitted with the microswitch tamper indicating enclosure opening.
The tamper cable is not connected to the terminal in the factory settings. In order to activate tamper,
remove the jumper from tamper terminal and plug in the tamper cable.
Each opening the enclosure will generate a failure signal at the ALARM technical output.
Fig. 11. TAMPER technical output.
5.4. PSU overload.
If the output overload occurs during the PSU operation, the PSU will limit the battery charging current
for 1 minute. If, after this time, the overload is removed, the normal charging mode will be restored.
5.5. Short-circuit of the PSU output.
In case of short-circuit of the AUX1 or AUX2 output, one of the fuses - FAUX1 or FAUX2 –becomes
permanently blown. The restoration of the voltage at the output requires the replacement of the fuse.
During a short circuit, the PSU failure is indicated by the ALARM LED and a collective failure signal at the
ALARM output.
5.6. Additional modules.
The PSU can be used with optional fuse or sequential modules that will increase its functionality in the case of
extended fire protection systems. A place to mount additional modules has been provided inside the power supply
housing.
When installing the fuse module in the power supply, take into account the current consumption for the
power supply's own needs, which is used for the calculation of the standby time (see section 6.8).
5.6.1. Extending the number of PSU outputs –EN54C-LB4 and EN54C-LB8 fuse modules.
The PSU is fitted with two independently protected outputs for connecting AUX1 and AUX2 receivers.
If more receivers are connected to the power supply, it is recommended to secure each of them with an
independent fuse. Such a solution will allow avoiding the failure of the entire system in the event of a fault (short
circuit on the line) of any of the connected receivers.
The possibility of such protection is provided by the optional EN54C-LB4 (4-channel) or EN54C-LB8
(8-channel) fuse module, for which the mounting location is provided inside the housing (Fig. 3).
Figure 10 shows the connection of the power supply, the fuse module, and the receivers (LOAD).
The fuse module, depending on the version, allows connecting 4 or 8 receivers to the power supply.
Output state is indicated by green LEDs.
The blown strip fuse is signaled as follows:
–switching off the appropriate LED: L1 for AUX1 etc.
–the red PSU LED lights up
–switching the PSU relay output into a no-voltage state (contacts as in Figure 10)
In addition, the blown fuse signal is passed to the EXTi input of the collective power supply failure, and the PSU
reports a failure at the ALARM output.
The relay output of the PSU fuse strip can be used for remote control, e.g. external optical indication.
Detailed information may be found in the operation manual of the module.

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5.6.2. Cooperation with electric actuators –EN54C-LS4 and EN54C-LS8 sequential modules.
The sequential modules are designed for use with electric actuators without return spring (EN54C-LS4) and
with electric actuators with return spring (EN54C-LS8) used for fire dampers and smoke vents.
These devices are used in fire alarm systems and smoke and heat control systems.
When switching on the electric actuator, a short-term current surge, exceeding its rated current, may occur.
If multiple electric actuators are connected, the above-mentioned surge current poses a risk of incorrect operation
of the power supply (e.g. triggering the protection of output circuit), despite not exceeding the current capacity of
the power supply.
The sequential switching module causes the receivers connected to its outputs to be sequentially switched,
with a delay of 100 ms. Thanks to this solution, the surge current is reduced to the value ensuring correct operation
of the power supply. Thus, it enables safe connection of additional actuators. All outputs are independently
protected by PTC polymer fuses and have LED diodes signaling the activation of each output.
The module is controlled by a control device (e.g. a CSP control panel) configuring the resistance at the
INPUT connector. The technical output of failure signals failures at the parametric INPUT input.
Detailed information may be found in the operation manual of the module.
Fig. 12. Example of connection of the EN54C-LS8 sequential module with actuators with return spring.

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6. Reserve power supply circuit.
The PSU is fitted with intelligent circuits: battery charging circuit with the function of the accelerated
charging and battery control, which main task is to monitor the condition of the batteries and the connections in the
circuit.
If the controller detects a power failure in the battery circuit, appropriate indication and change of the
ALARM technical output.
6.1. Battery detection.
The control unit of the PSU checks the voltage at the battery terminals and, depending on the measured
values, determines the appropriate reaction:
UBAT below 4 V –batteries not connected to the PSU circuits
UBAT = 4 to 20 V –faulty batteries
UBAT over 20 V –batteries connected to the PSU circuits
6.2. Protection against short-circuit of the battery terminals.
The PSU is fitted with the circuit protecting against short-circuit of the battery terminals. In case of short
circuit, control circuit immediately disconnects the batteries from the rest of the power supply circuit, so the loss of
output voltage on power supply outputs is not observed. Automatic reconnection of the batteries to the PSU's
circuits is only possible after the removal of the short-circuit and correct connection of the circuits.
6.3. Protection against reverse battery connection.
The PSU is protected against reverse connection of the battery terminals. In case of incorrect connection,
the FBAT fuse in the battery circuit becomes blown. The return to normal operation is possible only after replacing
the fuse and correct connection of the batteries.
6.4. Deep discharge battery protection UVP.
The PSU is fitted with the disconnection system and the battery discharge indication. If the voltage at
the battery terminals drops below 20 V±0.2 V during battery-assisted operation, acoustic indication will be activated
and the batteries will be disconnected within 15s.
The batteries are reconnected to the power supply unit automatically once the 230 V mains supply is
restored.
6.5. Battery test.
The PSU runs battery test every 5 minutes. During testing, the control unit of the PSU measures the
electrical parameters according to the implemented measuring method.
A negative result occurs when the:
battery circuit continuity is interrupted,
resistance in the battery circuit increases above 300 mΩ
terminal voltage drops below 24 V.
The battery test will also be automatically locked when the PSU is in the operating mode, in which the
battery test is impossible. Such condition occurs, for example, during battery assisted operation.
6.6. Measurement of the resistance of the battery circuit.
The PSU is checking the resistance in the battery circuit. During the measurement, the PSU driver takes
into account the key parameters in the circuit,and once the limit value of 300m ohms is exceeded, a failure is
indicated.
A failure may indicate considerable wear or loose cables connecting the batteries.
6.7. Battery temperature measurement.
Temperature measurement and compensation of the battery charging voltage can extend the life of the
batteries.
The PSU has a temperature sensor to monitor the temperature parameters of installed batteries.
It is recommended to place the temperature sensor between the batteries. Be careful not to damage the sensor
when moving the batteries.

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Fig. 13. Mounting of the temperature sensor.
The PSU has a separate space in the internal memory, used for recording of the registered battery temperature.
The recording cycle is performed in 6-hour intervals, enabling temperature registration for a period of 5 years. With
such an extended registration period, the user is able to control the temperature fluctuation range and to determine
its impact on the life of the batteries.
The nominal battery operating temperature recommended by many manufacturers is 25°C.
Working at elevated temperatures will significantly shorten the battery lifetime. The service life is
reduced by half for each sustained temperature rise of 8°C above the nominal temperature.
This means that the battery lifespan, when operated at 33°C, can be decreased by 50%!
6.8. Standby time.
Battery-assisted operating depends on battery capacity, charging level and load current. To maintain an
appropriate standby time, current drawn from the PSU in battery mode should be limited.
Required, minimum battery capacity to work with the PSU can be calculated with the following formula:
QAKU = 1.25 ﴾﴾Id + Iz﴿•Td + ﴾Ia + Iz﴿•Ta + 0.05 Ic ﴿
where:
QAKU –the minimum battery capacity [Ah]
1.25 –the factor related to the decrease in battery capacity due to aging
Id –the current drawn by the load during inspection [A]
Iz –PSU current consumption (including optional modules) [A] (Table 12)
Td –required inspection time [h]
Ia –the current drawn by the load during an alarm [A]
Ta –alarm duration [h]
Ic –short-term output current

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7. LCD display –preview
Table 3. Factory settings of PSU.
Indication time of EPS network loss
10s
section 8.2.2
Acoustic indication
1
section 8.2.3
Transmission
115.2k 8E1
section 8.2.4
Highlighting
Constant –50%
section 8.3.4
Blinking light indicating failure
ON
section 8.3.6
Passwords:
–user’s
–installer’s
1111
1234
section 8.1
7.1. Control panel.
The PSU features a panel with buttons and LCD display, enabling reading of all the available electrical
parameters. The panel buttons are used to select and confirm the parameters, which should be displayed.
Fig. 14. Control panel.
Table 4. Description of buttons and LEDs of LCD panel.
–move cursor on display
–next screen selection
–selection approval
–leaving editing mode without changing values
–selection approval
–green LED indicating 230 V power
–green LED AUX1 indicating power at AUX1 output of PSU
–green LED AUX2 indicating power at AUX2 output of PSU
–yellow LED ALARM indicating collective failure