Specifications

INSTALLATION
3
RS485 Half-Duplex Interface
The opto-isolated RS485 half-duplex (3 wires + shield) interface is available for polled
communication protocols.
It can be used for multidrop connections with a Datalogic Multiplexer, (see Figure 43 and par.
3.6.2).
The following pins of the 25-pin connector are used for RS485 half-duplex communication:
Pin Name Function
2 RTX485+ Transmitted/received data (+)
4 RTX485- Transmitted/received data (-)
7 GND_ISO Main opto-isolated reference ground
MATRIX
4
RTX485-
RTX485+
2
MULITPLEXER
RTX485-
RTX485+
7
GND_ISO
RS485REF
Earth
Ground
1
SHIELD
Figure 43 - RS485 Half-duplex Connections
33