6Es5 955-3Na12 Power Supply Unit; Technical Description - Siemens S5-155U System Manual

4.5

6ES5 955-3NA12 Power Supply Unit

4.5.1

Technical Description

System Manual
C79000-B8576-C199-03
Your 135U central controller (6ES5 135-3UA41) contains the
following power supply unit (PSU):
Type of PSU Input Voltage
Designation
6ES5 955-3NA12 24 V DC
(primary/secondary,
non-floating)
The power supply unit offers the following functions:
• • System power supply
All system voltages needed to operate the CC are supplied. The
15 V supply needed to operate the SINEC H1 system can be
incorporated in the power supply unit by fitting an auxiliary
submodule.
• • Voltage supply for backup
A lithium battery ensures data backup when power is switched off
or fails.
• • Heat dissipation
The power dissipation is removed by fans.

6ES5 955-3NA12 Power Supply Unit

Output Voltage
5 V/10 A DC
permissible range 0 to 10 A
24 V/0.8 A DC
24V/0.8 A DC permissible
range 0 to 0.8 A
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