Central Controllers and Expansion Units Power Supply Units

4.46ES5 955-3NA12 Power Supply Unit

Your 135U central controller (6ES5 135-3UA41) contains the following power supply unit (PSU):

Type of PSU

Designation

6ES5 955-3NA12 (primary/secondary, non-floating)

Input Voltage

Output Voltage

 

 

 

 

 

24 V DC

5 V/10 A DC

 

 

 

permissible range

0 to 10 A

 

24 V/0.8 A DC

 

 

 

permissible range

0 to 0.8

A

 

 

 

 

4.4.1Technical Description

The power supply unit offers the following functions:

SSystem 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.

SData backup

A lithium battery ensures data backup when power is switched off or fails.

SHeat dissipation

The power dissipation is removed by fans.

System Manual

4-57

C79000-G8576-C199-06

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Image 123
Siemens S5-135U/155U appendix 6ES5 955-3NA12 Power Supply Unit, Type of PSU Designation, Input Voltage Output Voltage