Terminals; Auxiliary Submodule - Siemens S5-155U System Manual

Terminals

DC Line Monitor Output
24V DC
+ -
Disconnect
before removing
power supply!
L+ M
1 2 3
ID Label Element
1
2
3 DC Line Screw

terminals

4 Monitor Output Relay
output
5 Enable Power Input/
supply output
6 DC 24 V; 0.4 A Output
7 Ext.Batt. 3.4 V Sockets
15 V auxiliary submodule
System Manual
C79000-B8576-C199-03
Enable
Power supply Battery
4 2 5 2
Purpose
Protective conductor terminal for PSU module and housing.
Strain reliefs for connecting cables, with metal contact surface for
cable shields.
System connection, 24 V input voltage
Standstill of one or both fans is signalled via LED and relay contact to
the exterior, and results in shutdown of output voltages (can be shut
down via jumper F-R of the PSU; then only relay signal and LED
indication).
No voltage at the EN input results in shutdown of the PSU. Not more
than 7 EN inputs may be driven with one U
This output can be used to power the enable inputs of the U Periphery.
Sockets for external 3.4 V backup voltage.
Caution
Observe the appropriate VDE specifications, especially
VDE 0100. The terminals at the front are suitable for a conductor
cross-section of up to 4 mm
adequate strain relief of the connections.
You can add a 15 V auxiliary submodule to the 6ES5 955-3NA12
power supply unit (e.g. if you wish to use SINEC H1). The auxiliary
submodule produces a stabilized 15 V output voltage from the 24 V
output voltage. The auxiliary submodule is short-circuit protected.
The output voltage is monitored. If the voltage is too low, the green
"15/24 V o.k." LED on the front plate goes off. If the voltage is too
high, the output is short-circuited by a thyristor.
6ES5 955-3NA12 Power Supply Unit
5V DC 15V/24V 24V DC 0,4A
DC
6 2
output (front terminal).
H
2 2
, solid, or 2.5 mm , flexible. Ensure
7
4
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