Does the M221 have a CSA document that has class1 Div2 rating?
Attached is the certificate of conformance for the M221 controllers.
If this FAQ did not solve your issue, you can chat with us at chat with us or e-mail us at customer.services@se.com to create a case with our Technical Support Team.
If you are not located in North America, please contact your local Customer Care Center for assistance: