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  1. tpfunder

    24VDC power for 4-20ma loop controll

    I have a AB 500 plc. and am working on a ph probe. my Question is; What is the proper way to power the loop. Let me be more specific. the 24vdc power is a switching power supply (sola) the 0vdc or common is not tied to Ground. Should it be tied to ground. The shielding on the cables is...

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