Siemens SIMATIC ET 200SP Manual page 19

Block diagram
The figure below shows the block diagram of the technology module with a connected
incremental encoder.
You must ground the shields of the cables between encoder and technology module both
through the shield terminal on the BaseUnit (shield bracket and terminal) and also on the
encoder.
①
②
③
④
⑤
⑥
Figure 3-1
Technology Module TM Count 1x24V (6ES7138‑6AA00‑0BA0)
Manual, 10/2013, A5E33002339-AA
Electrical isolation
Shield terminal on the BaseUnit
Technology
Backplane bus interface module of the technology module
Backplane bus
Input filter
Block diagram with incremental encoder
Wiring
3.1 Pin assignment
19