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Saturday, November 17, 2018
The Automation Safety Community Forum.
ESD and Safety Relay
Is Safety relay controlling multiple control relays advisable?


We are setting up a ESD system and saw a requirement of using safety relays. There are 7 scenarios given for the ESD. Each scenario will cause a set of equipment to shutdown. However, some equipment will also be controlled (shutdown) on other scenario/s.

I would like to clarify if controlling multiple control relays from a single safety relay is advisable? Currently, I'm leaning towards using safety relays for each equipment.

Ivan Joseph