4
*There needs to exist a connection between AL1 com-AL2 NC in order to obtain a summary alarm from
Com AL2 and NC AL1. This summary alarm indicates mains failure and changes in the load
3. Functional description
The incoming single-phase 230V AC is converted through the primary switched power module inside the
EPS-D unit into a DC charging voltage of 27.4V, 2-10A depending on the model (see table, page 10). The
DC voltage then feeds the battery with a DC voltage level that is factory adjusted to the correct level, via
2-pole MCB for battery connection.
The inverter is driven by 24V and is secured with a fuse. It also has a built-in fan. The deep discharge relay
breaks the voltage at about 21.5V during battery operation. The alarm relay monitors the output voltage of
the inverter and provides a potential-free relay output in case of a fault.
The incoming AC voltage is fused with glass tube fuses and then feeds the power module and a UPS
relay that switches between mains voltage and the inverter. This voltage is then forwarded to a distribution
board with 4 or 8 outputs where you can choose different functions.
During normal power supply, the mains voltage is directly connected to the distribution board via the UPS
relay. At the same time, the batteries are charged, and the inverter is in idle mode.
When the mains voltage disappears, the UPS relay switches to the inverter, which now supplies the
outputs with clean sine-wave voltage. The switchover time is about 15ms.
Every day, a shorter self-test is performed when the pre-programmed timer breaks the input voltage and
starts the inverter. This is done at 6:00 a.m. and lasts for ve minutes. If you want to change the factory
settings, contact Effekta service and support department.
Once a year, a full test is performed when the inverter performs a self-test that lasts for 60 minutes. If it
fails to last for 60 minutes of battery operation, the battery fault indicator will ash and the alarm relay will
switch. If everything is in order, the inverter will return to normal operation.
The outputs should be programmed for either safety luminaries, exit luminaries, lighting luminaries, or
always off, or only during normal power supply
Alarm outputs
🡲 EPS-D - Has multiple alarm functions and alarm outputs.
🡲 Alarm output type A - Mains failure alarm
🡲 Alarm output type B - Inverter failure alarm
🡲 Alarm output Alarm-1* - Output relay that alarms for an insulation fault
🡲 Alarm output Alarm-2* - Fault or interruption in the lighting loop
🡲 IN1 - Turns on everything (Normally Open)
🡲 IN2 - Turns on OUT1 (Normally Open)
🡲 EPS-D - has the following protections:
🡲 Short-circuit protection
🡲 Overload protection
🡲 Deep discharge protection
🡲 Fuses for incoming mains
🡲 Fuses for each output
🡲 Automatic fuse for inverter and batteries
🡲 Maximum cable distance: 400 m / 2.5 mm²
🡲
