Siemens SIMATIC ET 200AL System Manual page 377

Wiring
3.1 Terminal and block diagram
The figure below shows an example of the pin assignment of signal inputs with 2-wire and
3-wire connection.
① 3-wire connection
② 2-wire connection
③ 2-wire connection
④ DI circuit
⑤ Microcontroller
⑥ ET-Connection interface
⑦ Internal supply voltage
X10 to X13 Channels 0 to 7
X80 Infeed of supply voltages
X81 Loop-through of supply voltages
Figure 3-1 Terminal and block diagram
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X30 Infeed of the ET-Connection
X31 Loop-through of the ET-Connection
1L+ Supply voltage 1L+ (non-switched)
1M Ground 1M (non-switched)
2L+ Load voltage 2L+ (switched)
2M Ground 2M (switched)
1U 24 V encoder supply
S
DI Input signal
n
DI Channel status LEDs (0 to 7) (green)
DIAG LED diagnostic status (red/green)
DI 8x24VDC 4xM12 (6ES7141-5AF00-0BA0)
Equipment Manual, 08/2021, A5E36680963-AB
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