Title: Hardware Installation Guide.pdf
Port 1 is a 2-wire RS-485 interface that requires the following type of RS-485 cable: 24 AWG (minimum) twisted pair (with shields). Either 2-wire or 4-wire RS-485 cable configuration can be used for series 1. Only 2-wire RS-485 cable configuration can be used for series 2. The main run RS-485 cable should be no longer than 4000 feet (1219 m), 100 ohms maximum (Belden 9842 for 4-wire or Belden 9841 for 2-wire, plenum cabling Belden 88102, West Penn, or equivalent). The drop cables (to downstream devices) should be kept as short as possible, no longer than 10 feet.Upstream Controller Communication Wiring (2-wire)RS-485 2-WIRE COMMUNICATIONS2 WTR +TR -SGT+ T- SGEarth GroundWire with 24 AWG stranded twisted pair with shieldrevision 6 — 393LNL-1320 Dual Reader Interface ModuleThe RS-485 communication is asynchronous, half-duplex, using 1 start bit, 8 data bits, 1 stop bit.80.1.3Control Output Wiring