Siemens S5-155U System Manual page 126

Power Supply Units
Spikes
Protection and monitoring
Overvoltage shutdown U
A3
Current limiting for overload
Green LED 15 V o.k. for U
A3
Backup battery
Type
Capacity
No-load voltage
Voltage under load
Storage life
Service life in operation
(see Section 4.3.4 for backup times)
Rechargeable battery
Type
Capacity
Rated voltage
Service life in operation
(see Section 4.3.4 for backup times)
Service life of fans
Weight
Noise emission
Environmental data
4 - 56
6ES5 955-3LC41
≤ 3 % of U
A2
17 V ± 5%
1 to 1.5 I
AN3
LED lights up if
14.2 to 14.7 V < U < 16.1
A3
to 17.9 V
Lithium thionyl chloride
5 Ah
3.6 V
3.4 V
approx. 10 years
3 years max.
Nickel cadmium
1.2 Ah
3.6 V
o o
6 years at 40 C (104 F)
o
approx. 50,000 h at 40 C
approx. 5.8 kg
58 dBA
See technical specifications of
the S5-135U/155U CC
6ES5 955-3LF41
≤ 3% of U
A2
17 V ± 5%
1 to 1.5 I
AN3
LED lights up if
14.2 to 14.7 V <U < 16.1
A3
to 17.9 V
o
approx. 50,000 h at 40 C
approx. 5.8 kg
58 dBA
System Manual
C79000-B8576-C199-03