9XTend-PKG-R™ RS-232/485 RF Modem

9XTend‐PKG‐R RS‐232/485 RF Modem – Product Manual v1.2.42.2. RS-485 (2-wire) Operation2.2.1. DIP Switch Settings & Pin SignalsFigure 2‐06. Figure 2‐07.RS‐485 (2‐wire) Half‐DuplexPins used on the female RS‐232 (DB‐9)DIP Switch SettingsSerial ConnectorFigure 2‐08.RS‐485 (2‐wire) with Termination (optional)Termination is the 120 Ω resistor between T+ and T‐.DIP Switch settings are read and applied only while powering‐on.Note:Refer to Figures 2-15 and 2-16 for RJ-45 connector pin designations used inRS-485/422 environments.Table 2‐02. RS‐485 (2‐wire half‐duplex) Signals and their implementations on the XTend RF ModemDB-9 Pin RS-485 Name Description Implementation2 T/R- (TRA) Negative Data LineTransmit serial data to and from theXTend RF Modem5 GND Ground Signal Ground8 T/R+ (TRB) Positive Data Line9 PWR Power1, 3, 4, 6, 7 not usedTransmit serial data to and from theXTend RF ModemOptional power input that is connected internallyto the front power connector2.2.2. Wiring DiagramRS-485 (2-wire) Half-DuplexFigure 2‐09. XTend RF Modem in an RS‐485 (2‐wire) half‐duplex environment© 2005 MaxStream, Inc. Confidential and Proprietary 9