Haz area HMI

[zinc]

Besides the pushbuttons, my other concern is the HMI my powers-that-be want to have in the hazardous area. If in the pressurized enclosure, must it be contained behind a viewing window, or is a touch screen permitted?
This area is rated Class II Div 1, for zinc dust, although the hazard in my opinion is very slight!!

 

[jdsmith]

I have a Square D/Telemecanique Magelis HMI screen on my desk that says it's OK for Class 1/Div 2 if mounted in a NEMA 4 or NEMA 13 box according to the instructions. No mention of Class 2 though.