Central Controllers and Expansion Units Power Supply Units

6ES5 955-3NC42

Backup battery

6ES5 955-3NF42

Type Capacity No-load voltage Voltage under load Storage life

Service life in operation

(see Section 4.3.4 for backup times)

Lithium thionyl chloride

5Ah 3.6 V 3.4 V

approx. 10 years

3years max.

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

Nickel cadmium

1.2Ah

3.6V

6 years at 40 °C (104 °F)

yes

approx. 50.000 h at 40 °C

approx. 5.8 kg

58 dBA

approx. 50.000 h at 40 °C

approx. 5.8 kg

58 dBA

Environmental data

See technical specifications of the S5-135U/155U CC

4-56

System Manual

C79000-G8576-C199-06

Page 122
Image 122
Siemens S5-135U/155U appendix 6ES5 955-3NC42 Backup battery 6ES5 955-3NF42, Rechargeable battery