Features: 1. 1 current input port to connect with continuous current or current output products. Applicable for use in hazardous zone 2. 3 output ports - relay output, current output, and RS-485 3. LED indicator, user friendly 4. DIP switch for function selection 5. In house programming per customers' criteria 6. Self-test function for system function monitoring 7. Setting relay output as alarm for optional external sensing unit connection 8. Optional RS-485 interface enables easy system configuration & supply current data retrieve 9. Product design complies with explosion proof standard