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How to wire the built in analog input of the M221 to a Dwyer 626 pressure transmitter?
Issue
How to wire the built in analog input of the M221 to a Dwyer 626 pressure transmitter?

Product Line
SoMachine Basic / EcoStruxure Machine Expert-Basic, Modicon M221 PLC

Environment
Analog Input wiring

Resolution
The Dwyer 626 is a 3-wire connection which will requires it's own power supply.
The - (negative of M221) goes to the common and + (positive of M221) goes the white.  See below for more information:

Dwyer pressure transmitter:
Dwyer Pressure Transmitter pinout diagram
The receiver would be the M221 in this case.

M221 Analog Input +/-10V


For the types of wires required, also see the Modicon M221 Logic Controller User Guide
See Section 3.3 "Wiring Best Practices"
Document Link: https://www.se.com/ww/en/download/document/EIO0000000976/

Schneider Electric Việt Nam

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