Diapositive 1

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Low frequency RS485 interfaces
J.-D. Chatelain
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RS485 Interfaces - Internal connector
Differential voltage for Input
Power supply Differential voltage
Differential voltage for Outputs
Reference
Ground for housing
DIP-switch Address selection
Output 1 Output 2 Output 3 Output 4
Reference A B
Vref V-ref
IN IN-
V V-
GND
5V
RS232
RS485
Reset button
Switch
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RS485 Interfaces - Meaning of the LEDs
The interface is powered
RWM 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
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
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RS485 Interfaces - Coding the OUTPUTs
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
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Low frequency RS485 interfaces
End of this chapter
J.-D. Chatelain