Siemens SIMATIC ET 200S - Example

Special Measures for Interference-Free Operation
F-2
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Example
The following figure shows an output circuit that requires additional overvoltage
protection devices.
A
8
A
4
M
VDC
Contact in the output circuit
Inductance requires a circuit
(see the following figures)
Figure F-1 EMERGENCY-OFF relay contact in the output circuit