Siemens S5-135U/155U System Manual page 122

Central Controllers and Expansion Units Power Supply Units
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)
Protection against exhaustive discharge
Service life of fans
Weight
Noise emission
Environmental data
4-56
6ES5 955-3NC42
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
6 years at 40 C (104 F)
yes
approx. 50.000 h at 40 C
approx. 5.8 kg
58 dBA
See technical specifications of the S5-135U/155U CC
6ES5 955-3NF42
approx. 50.000 h at 40 C
approx. 5.8 kg
58 dBA
System Manual
C79000-G8576-C199-06