Siemens S5-135U/155U - Page 119

4-53
System Manual
C79000-G8576-C199-06
6ES5 955-3LF426ES5 955-3LC42
Output 3
Rated output voltage V
o/pN3
15 V DC ($ 5%) 15 V DC ($ 5%)
Rated output current I
o/pN3
0.5 A 2 A
Ripple v 1% of V
o/p3
v 1% of V
o/p3
Spikes v 3% of V
o/p2
v 3% of V
o/p2
Protection and monitoring
Overvoltage shutdown V
o/p3
17 V $ 5% 17 V $ 5%
Current limiting for overload 1 to 1.5 I
o/pN3
During startup 4 I
AN3
for 40 ms
1 to 1.5 I
o/pN3
Green LED “15V o.k.” for V
o/p3
LED lights up if
14.2 to 14.7 V < U
A3
< 16.1 to
17.9 V
LED lights up if 14.2 to 14.7 V <
U
A3
< 16.1 to 17.9 V
Maximum permitted capacity 10 mF 10 mF
Backup battery
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
5 Ah
3.6 V
3.4 V
approx. 10 years
3 years max.
Rechargeable battery
Type
Capacity
Rated voltage
Service life in operation
(see Section 4.3.4 for backup times)
Protection against exhaustive discharge
Nickel cadmium
1.2 Ah
3.6 V
6 years at 40°C (104 °F)
yes
Service life of fans approx. 50.000 h at 40°C approx. 50.000 h at 40°C
Weight approx. 5.8 kg approx. 5.8 kg
Noise emission 58 dBA 58 dBA
Environmental data See technical specifications of the S5-135U/155U CC
Central Controllers and Expansion Units Power Suppl
y
Unit
s