Siemens SIMATIC ET 200SP - Page 43

Connection
5.3 Electrical configuration
CPU 1515SP PC (F)
Manual, 05/2017, A5E32701806-AC
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The figure below shows a CPU 1515SP PC (F) in the overall configuration with infeed from a
TN-S system. The power supply supplies the CPU 1515SP PC (F) and the load circuits for
the 24 V DC modules.
With the CPU 1515SP PC (F) there is a fixed connection between the ground infeed terminal
and the contact springs to the mounting rail. You must ground the mounting rail separately in
the control cabinet.
①
Master switch
②
Short-circuit and overload protection
③
Load current supply (galvanic isolation)
④
In the CPU 1515SP PC (F), this connection is automatically established.
The represented layout of the power connections does not correspond to the actual layout; it
was chosen for demonstration purposes only.
Figure 5-2 Connecting the load voltage reference potential