Wiring; Terminal And Block Diagram - Siemens SIMATIC ET 200AL Manual

Wiring

3.1

Terminal and block diagram

The figure below shows an example of the pin assignment for voltage measurement and
thermocouple measurement.
① Voltage measurement
② Thermocouple measurement
③ Multiplexer
④ Analog-to-digital converter (ADC)
⑤ Microcontroller
⑥ ET-Connection interface
⑦ Internal supply voltage
X10 bis X13 Channels 0 to 3
X80 Infeed of supply voltages
X81 Loop-through of supply voltages
Figure 3-1 Example of voltage and thermocouple measurement
Analog input module AI 4xRTD/TC 4xM12 (6ES7144-5KD50-0BA0)
Equipment Manual, 08/2020, A5E48753535-AA
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)
M + Measuring input positive, channel n
n
M - Measuring input negative, channel n
n
AI Channel status LEDs (0, 1, 2 and 3) (green)
DIAG LED diagnostic status (red/green)
3
13