Siemens S5-135U/155U System Manual page 121

Protection and monitoring
Voltage Monitor
Overvoltage shutdown V
o/p1
Undervoltage signal V
o/p1
Current limiting for overload
Test sockets for Io/p on front plate
1
Signaling section
Green LED: "5V o.k." for V
o/p1
Output 2
Rated output voltage V
o/pN2
Rated output current I
o/pN2
Total current X2 and front terminals
Ripple
Spikes
Protection and monitoring
Current limiting for overload
Green LED: "24V o.k." for V
o/p2
Maximum permitted capacity
Output 3
Rated output voltage V
o/pN3
Rated output current I
o/pN3
Ripple
Spikes
Maximum permitted capacity
Protection and monitoring
Overvoltage shutdown V
o/p1
Current limiting for overload
Green LED: "15V o.k." for V
o/p3
Maximum permitted capacity
System Manual
C79000-G8576-C199-06
Central Controllers and Expansion Units Power Supply Units
6ES5 955-3NC42
Monitors voltage for
<14 V and >16 V
6 V 5%
4.75 V + 3%
1.0 to 1.2 I
o/pN1
(3 V 18 A)
linearity range 0.5 V/2.8 A
to 3 V/18 A
Signals for SIMATIC S5,
relays "Fan Warning, Fan Alarm,
Warning" 250 V/3 A
LED lights up if
4.75 V < V
o/p1
DC 24 V (+ 25%, -12.5%)
1 A
1 A max.
1% of V
o/p2
2% of V
o/p2
1 to 1.3 I
o/pN2
LED lights up if
V > 19.9 V to 21.1 V
o/p2
0.2 mF
DC 15 V ( 5%)
0.5 A
1% of V
o/p3
3% of V
o/p2
100 mF
17 V 5%
1 to 1.5 I
AN3
During startup 4 I for 40 ms
AN3
LED lights up if 14.2 to 14.7 V <
V < 16.1 to 17.9 V
o/p3
10 mF
6ES5 955-3NF42
Monitors voltage for
<14 V and >16 V
6 V 5%
4.75 V + 3%
1.0 to 1.2 I
o/pN1
(3 V 40 A)
linearity range 0.5 V/6.6 A
to 3 V/40 A
Signals for SIMATIC S5,
relays "Fan Warning, Fan Alarm,
Warning" 250 V/3 A
LED lights up if
4.75 V < V
o/p1
DC 24 V (+ 25%, -12.5%)
2.8 A
2.8 A max.
1% of V
o/p2
2% of V
o/p2
1 to 1.3 I
o/pN2
LED lights up if
V > 19.9 V to 21.1 V
o/p2
0.8 mF
DC 15 V ( 5%)
2 A
1% of V
o/p3
3% of V
o/p2
750 mF
17 V 5%
1 to 1.5 I
AN3
LED lights up if 14.2 to 14.7 V <
V < 16.1 to 17.9 V
o/p3
10 mF
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