1. ©Contrinex 2013 - JDC PPT_LF_Interfaces Low frequency RS485 interfaces J.-D. Chatelain

2. Interface 2 RWM 1 RWM 3 RWM 2 Power supply Fieldbus RWM 1RWM 4RWM 2 RWM 3RWM 4 Interface 1 Interface 3 RWM 1

3. DIP-switch Address selection Reference A B Reference RxTx(PC) TxRx(PC) Output 1 Output 2 Output 3 Output 4 V +ref V -ref Differential voltage for Outputs 5V ÷ Reference IN+ IN- Differential voltage for Input GND Ground for housing V+ V- Power supply Differential voltage Switch RS232 RS485 Reset button 01 RS485 Interfaces - Internal connector

4. The interface is poweredRWM 2 is correctly connected All the possibilities are programed by means of the configuration display or the CF command There are many possibilities to program the OUTPUTs. One of them is to set the OUTPUT when a transponder is present in front of the corresponding RWM A transponder is in front of RWM 2 There is a communication problem with RWM 2 RWM 2 is communicating with the transponder Now, there are transponders in front of RWM 2, 3 and 4 Another possibility is to clear the OUTPUT when a transponder is present in front of the corresponding RWM RS485 Interfaces - Meaning of the LEDs

5. These are the codes obtained when reading the outputs (Command OR) or the codes entered to force the outputs (Command OW). 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 RS485 Interfaces - Coding the OUTPUTs

6. ©Contrinex 2013 - JDC PPT_LF_Interfaces Low frequency RS485 interfaces J.-D. Chatelain End of this chapter