Title: Hardware Installation Guide.pdf
Downstream Device Communication WiringRS-485 2-WIRERS-485 4-WIRETR+8 , 6 , 4 , 2s t r o PY L N O E V E C E RITR+TR-GNDTR-GNDTR+9 , 7 , 5 , 3s t r o P& T M S N A R TIE V E C E RITR-GNDTR+TR- GNDR+ R- T+ T- SG90.1.3PowerThe Star Multiplexer accepts a 12 VDC ± 15% power source for its power input. The power source should be located as close to the Star Multiplexer as possible.Wire the power input with an 18 AWG (minimum) twisted pair cable.Power SourceRequirementsCurrentDC power sourcesIsolated, non-switching, regulated DC power250 mANote: When using a 12 VDC power source, be sure to observe polarity.434 — revision 6Hardware Installation Guide90.2Wiring and TerminationWhen wiring the Star Multiplexer(s) downstream from a controller, follow these guidelines for termination:Termination is not required on the intelligent system controller.Termination is not required on the Star Multiplexer input (port 1).