Siemens SIMATIC ET 200SP Manual page 26

Block diagram
The figure below shows the block diagram of the technology module.
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
⑦
⑧
Figure 3-1
TM Count 1x24V (6ES7138‑6AA01‑0BA0) technology module
Manual, 07/2019, A5E33002339-AD
Electrical isolation
Shield terminal on the BaseUnit
Technology
Backplane bus interface module of the technology module
Backplane bus
Input filter
Incremental encoder with signal N
Resistance is controlled depending on the connected encoder (sourcing output, sinking output
or push-pull)
Block diagram with incremental encoder
3.1 Pin assignment and block diagram
Wiring
25