I swear I've seen this issue discussed here before but I can't find it using the search feature.
I'm looking for the collective school of thought regarding plc inputs and outputs of differing voltages run in the same conduit. Many clients have a preference for 24Vdc inputs and others prefer 115 Vac. All our discrete output signals are 115 Vac to the starter circuits. The question is do you run the status/alarm inputs and control outputs between the starters and plc in the same conduit? I've always felt that only low level stuff like analog had to be separated from 115 Vac wiring. Has anyone experienced noise or interference problems mixing 24 Vdc and 115 Vac status and control in the same pipe?
I'm looking for the collective school of thought regarding plc inputs and outputs of differing voltages run in the same conduit. Many clients have a preference for 24Vdc inputs and others prefer 115 Vac. All our discrete output signals are 115 Vac to the starter circuits. The question is do you run the status/alarm inputs and control outputs between the starters and plc in the same conduit? I've always felt that only low level stuff like analog had to be separated from 115 Vac wiring. Has anyone experienced noise or interference problems mixing 24 Vdc and 115 Vac status and control in the same pipe?