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Digital I/O Control Cable with Multiple DC Voltages
2

Digital I/O Control Cable with Multiple DC Voltages

Digital I/O Control Cable with Multiple DC Voltages

(OP)
I have required digital input wiring from a switchgear to a VFD terminal strip rated probably <24Vdc. At the same time, I have digital outputs (dry contacts) coming from the same VFD terminal strip to the switchgear and these contacts will operate on 125Vdc powered from tge switchgear.

My question is that: Can I use one multicore cable for both digital inputs/ouputs although some will be 125Vdc and some will be <24Vdc?

I believe that this will not be an issue if I will use a 600V insulated cores and the fact that both are digital signals and are both <600V.

RE: Digital I/O Control Cable with Multiple DC Voltages

Im sure, you have some stndard on the issue.
From technical point of view, no problem.
From maintenence point of view, ...I like separate between few type of DC.

RE: Digital I/O Control Cable with Multiple DC Voltages

There would be a NEC issue if the 24 volt system is an Article 725, Class 2 or 3 system.

RE: Digital I/O Control Cable with Multiple DC Voltages

If all are digital you should have no problem, especially if the distance isn't excessive.

125V DC?

Keith Cress
kcress - http://www.flaminsystems.com

RE: Digital I/O Control Cable with Multiple DC Voltages

125V DC is an extremely common switchgear control voltage.  At least that's what its called; more like 135V DC with lots of margin for voltage drop.

RE: Digital I/O Control Cable with Multiple DC Voltages

(OP)
Thank you very much for all the imputs.

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