A project that i am currently working on has a Manual ESD on Gas burning heater. So there is a Sil rating (which I am not sure at the moment). My supervisor is recommending a e-stop in the field near the heater and a Selector switch in the control room. I question the use of the selector...
Anyone out there have a good symbol for a photelctric sensor to use in a schematic. The one in particular is the retroreflective type. Thanks ahead of time.
