Electrical Configuration - Siemens simatic ET 200SP User Manual

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Connection

5.3 Electrical configuration

5.3
Electrical configuration
Non-isolated configuration
Note
Unlike the ET 200SP distributed I/O system, the CPU 1515SP PC can only be operated with
a non-isolated configuration.
The following figure shows the overall configuration of a CPU 1515SP PC when supplied
from a TN-S system. The power supply supplies the CPU 1515SP PC and the load circuit for
the 24 V DC modules.
For the CPU 1515SP PC, there is a fixed connection between the ground infeed terminal
and the contact springs to the mounting rail. The mounting rail must be grounded separately
in the control cabinet.
Figure 5-2
36
Master switch
Short-circuit and overload protection
Load current supply (galvanic isolation)
This connection is established automatically with the CPU 1515SP PC.
The represented layout of the power connections does not correspond to the actual layout; it
was chosen for demonstration purposes only.
Connecting the load voltage reference potential
CPU 1515SP PC
Manual, 12/2014, A5E32701806-AA

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