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jblplc

Unitronics 24V

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I have one PLC (transistor output) on panel with her 24V power supply. I have another PLC on panel with her 24V power supply. The distance between is 40 foot. I want send a output signal to one plc to another (with shielded cable). When I try I have only 9 Volts on the input. Why? How send and receive signal whiout communication? The 0V reference can be shared between power supply’s ? Thank you

Edited by jblplc
ajout

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Hello,

Yes,the two plcs should have same tension reference
Or  you will need a relay interface between them.

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