R
Hello,
Often a PLC will be used to control multiple field devices, each with its own 24V rail. For a small PLC that does not have swap-able I/O modules, generally one of these field supplies will be selected to supply power to the PLC, or a local supply will be used. I've been looking around for multiple-input PLCs that can auto-switch, but so far have just come up with external solutions involving stand-alone isolators and redundancy switchers. Is anyone aware of a PLC that can auto-select without down-time?
Thank you,
Tom
Often a PLC will be used to control multiple field devices, each with its own 24V rail. For a small PLC that does not have swap-able I/O modules, generally one of these field supplies will be selected to supply power to the PLC, or a local supply will be used. I've been looking around for multiple-input PLCs that can auto-switch, but so far have just come up with external solutions involving stand-alone isolators and redundancy switchers. Is anyone aware of a PLC that can auto-select without down-time?
Thank you,
Tom