Fieldbus Communication Expansion Unit. Meets the following Atex Standards: 2014/34/EU; EN IEC 60079-0:2018; EN 60079-7:2015; UL 121201; CSA C22.2 No. 213-17. CANopen. Conformal coating of the electronic boards. Clamp Terminal Blocks Expansion unit for connection to the most common industrial Field-Bus systems for diagnostics and data communication. Electronics protected by protective film that acts as a barrier against dust and moisture and protects the board from salt and chemical corrosion. Designed to operate in environments with potentially hazardous atmospheres, it is classified: 3G Ex ec IIC T5 Gc with -40°C ≤ Tamb ≤ +50°C | 3G Ex ec IIC T4 Gc with -40°C ≤ Tamb ≤ +65°C.