Title: Hardware Installation Guide.pdf
Each RS-485 communication line can have any number of DEPENDENT devices, but must have only one MASTER device. The transmit lines of the MASTER device are connected to the receive lines of therevision 6 — 37Hardware Installation GuidelinesDEPENDENT devices and the receive lines of the MASTER device are connected to the transmit lines of the DEPENDENT devices. Observe the + and the - of each pair (NOTE: only applies to 4-wire RS-485 wiring).Refer to the following diagrams for RS-485 Signal Ground and Termination.RS-485 Multi-drop Wiring and EOL TerminationRS-485 Multi-drop Wiring and EOL TerminationISCTT+ T- SGT = On Board TerminationShieldEarth Ground, one point only per ISCe r Wi r e v o C C V Pe r Wi r e v o C C V Pn ai r Dr o e r Wi r e v o C C V P/e r i WT+ T- SGT+ T- SGT+ T- SGDual Reader InterfaceBiometric Reader GatewayT Dual Reader InterfaceTT+ T- SGDownstream ports 2 & 3 typicalT+ T- SG Biometric ReaderT+ T- SG Biometric Reader