Siemens simatic et 200s Operating Instructions Manual page 22

1STEP 5V/204kHz
2.3 Terminal Assignment Diagram
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22
Terminal assignment Remarks
The cables between the terminal
module and power unit must be
shielded and twisted in pairs.
P, /P and D, /D are signals to
RS 422.
Operating Instructions, 05/2007, A5E00124871-04
ET 200S Positioning