Title: Hardware Installation Guide.pdf
66 — revision 6Hardware Installation GuideDownstream Device Communication Wiring (Ports 2-3)Ports 2 - 3 RS-485TR2 +TR2 +TR2 -TR2 -GNDGNDTR3 +TR3 +TR3 -TR3 -GNDGNDGND T- T+GND TR- TR+ R- R+Downstream DeviceEarth Ground2-WIRE4-WIRERS-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.)Reader Interface ModuleTo configure all four downstream ISC ports as 2-wire RS-485, follow the 2-wire diagram and repeat on each set of three terminators, TRX+, TRX-, GND.revision 6 — 67LNL-500 Intelligent System ControllerTo configure as two 4-wire RS-485 ports, follow the 4-wire diagram:Port 2/3:(Transmit)(Receive)GRDTR2+, TR2-TR3+, TR3-Notes:The ISC can be located anywhere along the RS-485 line.Install an RS-485 terminator for each end-of-line device.9.1.4Power