W
In a standard liquid processing application (a few pumps and valves), are you allowed to use standard PLC logic to execute a E-Stop procedure?
Is there a law or regulation stating that you have to use hardwired logic or an approved safety PLC/relay to execute this procedure?
Any advice or direction on this matter would be appreciated.
Is there a law or regulation stating that you have to use hardwired logic or an approved safety PLC/relay to execute this procedure?
Any advice or direction on this matter would be appreciated.