jdbrandt
Lifetime Supporting Member
IMHO, you need to stop thinking electrically.OK I just got dropped in another somewhat odd job. I have to do have safety door switches E-stops in a classified area Class 1 DIV 1. The mechanics of installing them is not the issue my concern is the intrinsic barrier that I have found are not rated for safety devices. Anybody have a clue about this.
The last couple of jobs the customer has signed off on the barriers being non safety rated as-long as we did 4 wire 1 wire on an individual barrier. So we used 4 barriers per E-Stop and Gate Switch. I usually use 2 channel barriers but for these I only used 1 channel.
Any Ideas?
Thanks for your time
Why not use keyed-interlock devices, with the signalling portion in a non-classified area?
There are a variety of suppliers out there, but the concept is that a captive key stays on the control panel, and, when removed, initiates a stop. Then, the same key opens a MECHANICAL lock in the classified area.
Used them all the time 'back in the day' of solvent-based printing.