Data Sheet

Pulsar
®
Moduły sekwencyjne EN5C4-LS4 oraz EN54C-LS8.
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 electric actuator, a short-
term current surge, exceeding its rated current, may occur. If multiple electric actuators are connected, above-
mentioned surge current poses a risk of incorrect operation of power supply (e.g. triggering protection of output
circuit), despite not exceeding current capacity of power supply. Sequential switching module causes receivers
connected to its outputs to be sequentially switched, with a delay of 100 ms. Thanks to this solution, surge current
is reduced to value ensuring correct operation of power supply.
Example of connection of EN54C-LS4 sequential module.
Example of connection of EN54C-LS8 sequential module.
PSU
OUT1 OUT2 OUT3 OUT4
+AUX1- +AUX2-
+BAT-
ALARM
TAMPER
TEMP
AUX1
AUX2
+EXTi-
EPS
4.7 kW
4.7 kW
+ 24V -
INPUT
+AUX1- +AUX2-
+BAT-
ALARM
TAMPER
TEMP
AUX1
AUX2
+EXTi-
EPS
4.7 kW
4.7 kW
+ 24V -
INPUT
+ 24V -
INPUT
EN54C-LCD series power supply unit
Power supplies for fire alarm systems 27,6 V DC
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