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How do you connect a sensor to the analog signal modules of SIMATIC S7-1200?
#1
Description
A field sensor with the properties below can be connected to the analog input signal modules of S7-1200:
•Power supply (voltage): +/-10V, +/-5V or +/-2.5V or
•Power supply (current): 0 to 20 mA
The type of measurement (voltage or current) can be selected with 2 channels in each case.
The figures below show examples of how to connect different sensor types (voltage power supply: 24V DC) to the analog signal module SM 1231 AI 4 x 13 Bit (channel 0):
[عکس: 40913432_S7-1200_SM1234_4-wire_sensor_01.png]

Fig. 01: Connection of a four-wire sensor

[عکس: 40913432_S7-1200_SM1234_4-wire_sensor_02.png]

Fig. 02: Connection of a three-wire sensor

[عکس: 40913432_S7-1200_SM1234_4-wire_sensor_03.png]

Fig. 03: Current measurement with a two-wire sensor
Note
•When using a 4-20mA sensor, the measured value must be converted accordingly (Entry ID 39334504).
•More information about SIMATIC S7-1200 is available in the system manual for SIMATIC S7-1200 (Entry ID: 36932465).
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