Siemens SIMATIC ET 200AL System Manual page 464

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 as well as signal outputs.
① Configured as input: 3-wire connection
② Configured as output
③ Configured as input: 2-wire connection
④ Output
⑤ DI/DQ circuit
⑥ Microcontroller
⑦ Monitoring
⑧ ET-Connection interface
⑨ Internal supply voltage
⑩ DQ circuit
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
Digital input/digital output module DIQ 4+DQ 4x24VDC/0.5A 4xM12 (6ES7143-5AF00-0BA0)
Equipment Manual, 08/2021, A5E36683613-AB
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
DIQ Input/output signal
n
DQ Output signal
n
DIQ LEDs channel status (0, 1, 2 and 3) (green)
DQ LEDs channel status (4, 5, 6 and 7) (green)
DIAG LED diagnostic status (red/green)
PWR LED supply voltage 2L+ (green)
3
13