Siemens SIMATIC ET 200S Operating Instructions Manual page 238

1SSI
4.4 Terminal Assignment Diagram
Terminal Assignment
You will find the terminal assignment for the 1SSI in the table below.
Table 4- 1 Terminal Assignment of the 1SSI
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It is essential that you maintain the correct polarity when wiring the encoder. If you do not, an absolute encoder error is
1
reported. Signals according to RS422
Short circuit-proof, maximum 0.5 A.
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Terminal Assignment Remarks
Terminals 1 to 8:
1/5: Data from the SSI encoder
2/6: Power supply for absolute encoder
and switch
2
3: Chassis ground
7: Digital input latch function
4/8: SSI clock (clock wire)
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
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