Siemens S5-135U/155U - Manual (Page 121)

4-55
System Manual
C79000-G8576-C199-06
6ES5 955-3NF42 6ES5 955-3NC42
Protection and monitoring
Voltage Monitor Monitors voltage for
<14 V and >16 V Monitors voltage for
<14 V and >16 V
Overvoltage shutdown V
o/p1
6 V
$ 5%
6 V
$ 5%
Undervoltage signal V
o/p1
4.75 V + 3% 4.75 V + 3%
Current limiting for overload 1.0 to 1.2 I
o/pN1
1.0 to 1.2 I
o/pN1
Test sockets for Io/p
1
on front plate (3 V ¢ 18 A)
linearity range 0.5 V/2.8 A
to 3 V/18 A
(3 V ¢ 40 A)
linearity range 0.5 V/6.6 A
to 3 V/40 A
Signaling section Signals for SIMATIC S5,
relays “Fan Warning, Fan Alarm,
Warning” 250 V/3 A Signals for SIMATIC S5,
relays “Fan Warning, Fan Alarm,
Warning” 250 V/3 A
Green LED: “5V o.k.” for V
o/p1
LED lights up if
4.75 V < V
o/p1
LED lights up if
4.75 V < V
o/p1
Output 2
Rated output voltage V
o/pN2
DC 24 V (+ 25%, -12.5%) DC 24 V (+ 25%, -12.5%)
Rated output current I
o/pN2
1 A 2.8 A
Total current X2 and front terminals 1 A max. 2.8 A max.
Ripple
v 1% of V
o/p2
v 1% of V
o/p2
Spikes
v 2% of V
o/p2
v 2% of V
o/p2
Protection and monitoring
Current limiting for overload 1 to 1.3 I
o/pN2
1 to 1.3 I
o/pN2
Green LED: “24V o.k.” for V
o/p2
LED lights up if
V
o/p2
> 19.9 V to 21.1 V
LED lights up if
V
o/p2
> 19.9 V to 21.1 V
Maximum permitted capacity 0.2 mF 0.8 mF
Output 3
Rated output voltage V
o/pN3
DC 15 V (
$ 5%)
DC 15 V (
$ 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
Maximum permitted capacity 100 mF 750 mF
Protection and monitoring
Overvoltage shutdown V
o/p1
17 V $ 5% 17 V $ 5%
Current limiting for overload 1 to 1.5 I
AN3
During startup 4
I
AN3
for 40 ms
1 to 1.5 I
AN3
Green LED: “15V o.k.” for V
o/p3
LED lights up if 14.2 to 14.7 V <
V
o/p3
< 16.1 to 17.9 V
LED lights up if 14.2 to 14.7 V <
V
o/p3
< 16.1 to 17.9 V
Maximum permitted capacity 10 mF 10 mF
Central Controllers and Expansion Units Power Supply Units