according to EN 81-20 18.104.22.168
Switching power supply with emergency power supply unit 24VDC / 1.2Ah
According to EN 81-20 22.214.171.124:
There shall be an automatically rechargeable emergency supply, which is capable of ensuring at least a lighting intensity of 5 lux for 1 h. The measurements are taken in the centre of the car one meter above the floor, on the car roof and at the alarm initiation device in the car.
The power supply unit (NSG) is suitable for the emergency lighting in and on the car in case of power failure. If the supply voltage drops out, a direct-current voltage with 24V will be available at the output terminals. The capacity of the internal lead accumulators is monitored according to EN 81-28.
If the rated capacity is not reached, this is indicated by a potential free contact. During emergency power operation, the accumulators are protected against being destroyed by a deep discharge. During mains operation they are continuously charged with a trickle charge.
Through an input, the emergency power unit can be informed about an intended disconnection of the cabin light. If the supply voltage is interrupted and the input is triggered at the same time, the emergency power unit does not switch to emergency power supply.
|Input 1||100-240V AC 50Hz/60Hz, 2m supply line|
|Output 1||24V DC, 1.2Ah|
|Input 2||for cabin light switch-off on purpose, (potential-free contact in the control system)|
|Output 2||potential-free signal contact „Battery capacity low“, 1x changer, 30VDC 1A SELV|
|Battery||2x lead fleece gel accumulator 12V 1.2Ah connection in series|
|Operating temperature||-10°C up to 50°C|
|Dimensions||L: 255 x W: 180 x H: 90mm|
Emergency power supply unit (NSG) 24VDC / 1.2Ah (020446)
1x Emergency power supply unit IP33 equipped and pre-wired with: power supply 230VAC/24VDC with 2m supply line H05VV-F 2x0.75mm², emergency supply with capacity monitoring acc. to EN 81-28, 2x battery 12V/1.2Ah and output terminals 24V DC.