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DS6300
2
RS485 Half-Duplex Interface
The RS485 half-duplex interface can be used for multidrop connections with a Datalogic
multiplexer or it can also be used for a master/slave layout. The overall maximum cable
length should not exceed 1200 m (3937 ft).
The following pins of the 25-pin and 26-pin connector are used for RS485 half-duplex
interface connection:
Pin Name Function
2 RTX485 + RS485 input/output (+)
4 RTX485 - RS485 input/output (-)
7 GND_ISO Main signal ground
DS6300
7
GND_ISO
RTX485+
2
RTX485-
4
RS485REF
MULTIPLEXER
RTX485-
RTX485+
1
Earth
Ground
CHASSIS
Figure 22 – RS485 Half-Duplex Interface Connections
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