Terminal Assignment Diagram - Siemens SIMATIC ET 200S Operating Instructions Manual

4.4

Terminal Assignment Diagram

Wiring Rules
The cables (terminals 1 and 5 and terminals 4 and 8) must be shielded, twisted-pair cables.
The shield must be supported at both ends. To do this use the shield connection (see the ET
200S Distributed I/O System Manual).
Terminal Assignment
You will find the terminal assignment for the 1SSI in the table below.
Table 4-1 Terminal Assignment of the 1SSI
View
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.
2
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
Terminal Assignment
4.4 Terminal Assignment Diagram
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)
1SSI
1
1
227