Title: Hardware Installation Guide.pdf
The (EIA) Electronic Industries Association standard defines RS-485 as an electrical interface for multi-port communications on a bus transmission line. It allows for high-speed data transfer over extended distances (4000 feet/1219 m). The RS-485 interface uses a balance of differential transmitter/receiver to reject common mode noise. For increased reliability over the extended distances, End-Of-Line (EOL) termination is required.RS-485 (2-wire or 4-wire) must be terminated at both ends of the RS-485 line (bus). Terminating the line provides a more reliable communication by minimizing the signalrevision 6 — 317LNL-1200-U Output Control Modulereflection and external noise coupling. Each component provided has an on-board terminator. The installer should determine which device is at the end of the communication line.59.3Relay OutputsThe Output Control Module contains sixteen (16) form-C dry-contact relay outputs, Relay 1 through 16 (K1-K11 & K16-K20). Each provides up to 5A 30VDC.