MATRIX 450™ REFERENCE MANUAL
76
5
5.5.3 RS485
Half-Duplex
Interface
NOTE
This interface is provided for backward compatibility. We recommend using
the more efficient ID-NET™ network for Master/Slave or Multiplexer layouts.
The RS485 half-duplex (3 wires + shield) interface is available for polled communication
protocols.
It can be used for Multidrop connections with a Datalogic Multiplexer, exploiting a proprietary
protocol based on polled mode called MUX32 protocol, where a master device polls slave
devices to collect data.
The following pins of the M16 19-pin connector are used for RS485 half-duplex
communication:
Pin Name
Function
M
RTX+
RS485 Receive/Transmit Data (+)
N
RTX-
RS485 Receive/Transmit Data (-)
L GND
Ground
MATRIX
RTX-
RTX+
MULITPLEXER
RTX485-
GND
RS485REF
SHIELD
N
M
L
K
Earth Ground
Earth Ground
Chassis
Figure 62 - RS485 Half-duplex Connections
This interface is forced by software when the protocol selected is MUX32 protocol.
In a Multiplexer layout, the Multidrop address must also be set via serial channel by the
VisiSet™ utility or by the Host Programming Mode.
Summary of Contents for Matrix 450
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