Title: Hardware Installation Guide.pdf
For Ports 2-5, the following type of RS-485 cable is required: 24 AWG (minimum) twisted pair (with shields.) Either 2-wire or 4-wire RS-485 cable configuration can be used. The main run RS-485 cable should be no longer than 4000 feet (1219 m), 100 ohms maximum (Belden 9842 4-wire or 9841 2-wire, plenum cabling Belden 88102 or equivalent). The drop cables (to readers and other devices) should be kept as short as possible, no longer than 10 feet.Each RS-485 line should contain only 2 terminators, one at each end.Downstream Device Communication Wiring (Ports 2-5)Ports 2 - 5 RS-485TR2 +TR2 -GNDTR3 +TR2 +TR3 -TR2 -GNDGNDTR3 +TR4 +TR3 -TR4 -GNDGNDTR5 +TR5 -GNDGND T- T+TR- TR+ R- R+ SGDownstream Device2-WIRE4-WIRErevision 6 — 83LNL-1000 Intelligent System ControllerRS-485 Communication WiringRS-485 CABLE, 100 Ohm IMPEDANCE BELDEN 9842 OR EQUIVALENTTO PREVIOUS UNIT OR TERMINATORTO NEXT UNIT OR TERMINATORKEEP DOWN LEAD SHORT (10 FEET MAX.)