Contactors in Class I Div II area

[phuz]

These enclosures will be NEMA 4X in a Class I Div II area. Obviously all the PLC components are Class I Div II rated, as is our HMI, safety components, but my concern is with components like contactors (ie, Siemens 3RH1131-1BB40). Are these OK? Each panel will have its own safety circuit utilizing a MSR safety relay and safety contactors.

[Ken Moore]

Contactors must have hermetically sealed contacts, or be in purged enclosures.

[rswolff]

or in XP enclosures......I would refer you to NEC 500 and 502. Bob

[rswolff]

and oh yes....Class1 Div2 doesn't specifically care about machine safety circuits or devices.....just how the devices are installed in the classified area......... bob