Adeunis RF ARF35 User Manual
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06-06-V6-smn p5• MODEM / DTE RS232This is for example the case of a modem connected to a PCTX RXN° / SUB-D 9 N O M+ Vcc5 G ND2 RXD3 TXD+-RXTXIN H IBRTSC TSTX+TX-RX+RX-• DCE RS232This is for example the case of a modem connected to a measuring device.TX RXN ° / SUB -D 9 N O M+ Vcc5 G N D3 RXD2 T XD+-RXTXIN H IBRTSC TSTX+TX-RX+RX-• RS485 wiring100 ΩRtJumperBAB’ / ZA’ / YRTB / RX-A / RX+Z / TX-Y / TX+RTMODEMNetwork termination 485RS485 NetworkThe RS485 link needs to be adapted (each side). The modem includes a 100Ω terminationresistor:• Jumper mounted, the resistor is connected between A and B (respectively RX+ and RX-)• No jumper, the resistor is not connected between A and BIf the modem is ending the RS485 bus, the jumper must be mounted.The RS485 bus wiring needs only two wires for the PCB revision B (ARF7120/B) orgreater. For the PCB revision A (ARF7120/A), the TX+ (respectively TX-) and RX+(respectively RX-) MUST be connected together by the USER.TX RXBUS RS485 NAM E+ VccGNDA TX+/RX+B TX-/ RX-+-RXTXINHIBRTSCTSTX+TX-RX+RX-jumperConnect only TX-or RX- (note 1)Connect only TX+or RX+ (note 1)PCB revision B or greaterARF7120/BNote 1:¾ TX- is connected to RX- on the PCB¾ TX+ is connected to RX+ on the PCBFigure 1: RS485 wiring, PCB marked ARF7120/B or greaterSERIAL LINK WIRING |
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