I need a RTU/PLC to be installed in Class I, Div II hazardous area and my customer requires a 80 deg C temperature spec. Also, the controller needs to have conformal coating.

I`d really appreciate if anyone can tell me of a PLC/RTU manufacturer/model.

 

The closest thing that I know of near this temp. range is the Modicon Compact series. Not all modules but some within this series are rated to 70 deg C. and conformal coating is available. However, conformal coating derates the operating temperature.

 

Almost an answer:
Control Microsystems has a SCADAPack that has a temp rating up to 70 deg C; suitable for Class 1 Div. 2 Grp A, B, C, D.