Output 2 (bus)
Rated output voltage U
AN2
24 V DC +25 %/-20 %
Rated output current I
AN2
0.8 A DC
Total current rating 24 V/15 V output
≤
0.8 A
Ripple
Input voltage ripple
Protection and monitoring
Fuse for overcurrent protection
Test sockets for U
A2
-
green LED 15 V/24 V o.k. for U
A2
(fuse monitor)
1.5 A fast, 250 V, 6.3 x 32 mm
on front plate (24 V test)
The LED lights up wenn U
A2
>
17.9 to 18.5 V
Output 2 (front)
Rated output voltage U
AN4
24 V DC +25 %/-24 %
Rated output current I
AN4
0.4 A DC
Capacitive load
< 100 nF
Protection and monitoring
Overcurrent protection by current limiting I
A4
Test sockets for U
A2
-
green LED 24 V o.k. for U
A4
> 0.44 A
on front plate (24 V test)
The LED lights up when U
A4
> 16 V +/-20 %
Total current rating of 24 V voltages (bus and
front)
must not exceed 0.8 A
Output 3 with 15 V auxiliary submodule
Rated output voltage U
AN3
15 V DC +/-5 %
Rated output current I
AN3
0.5 A DC
Ripple
≤
5 % of U
AN3
Protection and Monitoring
Overvoltage protection (output is
short-circuited at U
A3
)
Undervoltage signal (LED 15 V/24 V o.k.
on front plate goes off at)
Overcurrent protection I
A3
by current limiting
Test socket for U
A3
≥
18.5 V
≤
14 V
±
3 %
> 0.5 to 1.5 A
on front plate (15 V test)
Fans
Fan type
2 axial fans
Input voltage
24 V DC
Flow rate per fan
160 m
3
/h (no-load value)
Fan monitoring
Air flow monitoring with PTC thermistors as sensors;
stoppage of one or both fans is detected and signalled
to the exterior via Fan Fault LED and relay contacts,
and results in shutdown of output voltage (switched
off via jumper F-R).
Expected service life of a fan
30,000 to 40,000 h typical at 55
o
C
40,000 to 50,000 h typical at 30
o
C
4
6ES5 955-3NA12 Power Supply Unit
System Manual
C79000-B8576-C199-03
4 - 81
