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Thanks so far for all the input. Keep them coming. I knew of the not mixing very high ac volt with low and also mixing of ac & dc. But when it is 100v DC difference is what propmpted me to ask the question. The configuration is that I have a AB Flex I/O. The Control net adapter is powered by...

I have I/O modules which have 24vdc control power. all the I/Os are 125vdc. Can these voltages be mixed in the wire ducts without an issue?

Does anyone know what the different colors of a 3 wire instrument circuit? I have a reqmnt to use Black, Lt Blue, Brown. Which is the (+), (-)/rtn, and the Signal?

Thx BP,this is a USA machine and facility. Basically this was a customer request to have the estop sw oper backwards. supposedly they are afraid of someone accidentally bumping into it and shutting the machine down even though there is a collar to prevent it. As far as the restart, yes there is...

Is there an code issues prohibiting the reversing operation of the emergency stop switch. In other words, using the pull of the switch to stop the machine and a push to run?

I have been searching for a recognized symbol for a journal bearing vibration sensor. Any idea of where to find? Thanks