Central Controllers and Expansion Units Power Supply Units

6ES5 955-3LC42

6ES5 955-3LF42

Output 3

Rated output voltage Vo/pN3

Rated output current Io/pN3

Ripple

Spikes

15 V DC ($ 5%)

0.5 A

v1% of Vo/p3

v3% of Vo/p2

15 V DC ($ 5%)

2 A

v1% of Vo/p3

v3% of Vo/p2

Protection and monitoring

Overvoltage shutdown Vo/p3

Current limiting for overload

Green LED ª15V o.k.º for Vo/p3

Maximum permitted capacity

Backup battery

17 V $ 5%

1 to 1.5 Io/pN3

During startup 4 IAN3 for 40 ms

LED lights up if

14.2to 14.7 V < UA3< 16.1 to

17.9V

10 mF

17 V $ 5%

1 to 1.5 Io/pN3

LED lights up if 14.2 to 14.7 V < UA3< 16.1 to 17.9 V

10 mF

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

Lithium thionyl chloride

5Ah 3.6 V 3.4 V

approx. 10 years

3years max.

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

System Manual

4-53

C79000-G8576-C199-06

Page 119
Image 119
Siemens S5-135U/155U Backup battery, Rechargeable battery, Service life of fans Weight Noise emission, Environmental data