Mod bus Barnett Gateway User Guide Appendix B Reference Appendix B 1. Specifications Cc Vv Rob LISTED — Ee Brotherhoods FRG Nad! R1: One 3-pews terminal block: RS-485 GND) R2: One 3-pews terminal block: RS-485 GND) Electrical Connections Power: One 3-pews terminal block: Power port (+ FG) One Ethernet 10/100 Base T port Input Voltage: 12-24VDC or VAC Current draw: @ 12V, 240 mA Power Requirements | poe, Rating: 2.