Datalogic Scanning LASER SCANNER DS4300 - Manual (Page 28)

DATALOGIC DS4300
Installation - 2.13
RS485 Half-Duplex
The RS485 half-duplex (3 wires + shield) interface is used for polled
communication protocols.
It can be used for Multidrop connections in a master/slave layout or with a
Datalogic Multiplexer, (see par. 2.6.4 and 2.6.5).
The following pins of the 25-pin connector are used for RS485 half-duplex
communications:
Pin Name Function
2 RTX485+ RS485 transmitted/received data +
4 RTX485- RS485 transmitted/received data -
7 SGND Main signal ground main interface
DS4300 MULTIPLEXER
RTX485+ 2
RTX485- 4
RTX485+
RTX485-
7 SGND Main
RS485REF
Figure 2.16 - RS485 half-duplex connections