direct-drive Archives - Machinery Safety 101

28 October, 2019

Using Form C relays in safety circuits

in Control Functions, Control Reliability, Functional Safety /

I recently had a discussion with a colleague who wanted to know if it was OK for a design to include a form C relay in an e-stop circuit. You might recall that e-stop functions are required to meet at least PLc/SIL1 requirements [1], [2]. It’s important to remember that PLc/SIL1 can be met using…

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