Analog input module AI 4xRTD/TC 4xM12 (6ES7144-5KD50-0BA0)
Equipment Manual, 08/2020, A5E48753535-AA
13
Wiring
3
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
X30
Infeed of the ET-Connection
②
Thermocouple measurement
X31
Loop-through of the ET-Connection
③
Multiplexer
1L+
Supply voltage 1L+ (non-switched)
④
Analog-to-digital converter (ADC)
1M
Ground 1M (non-switched)
⑤
Microcontroller
2L+
Load voltage 2L+ (switched)
⑥
ET-Connection interface
2M
Ground 2M (switched)
⑦
Internal supply voltage
M
n
+
Measuring input positive, channel n
X10 bis X13
Channels 0 to 3
M
n
-
Measuring input negative, channel n
X80
Infeed of supply voltages
AI
Channel status LEDs (0, 1, 2 and 3) (green)
X81
Loop-through of supply voltages
DIAG
LED diagnostic status (red/green)
Figure 3-1
Example of voltage and thermocouple measurement
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