
MATRIX 400™ REFERENCE MANUAL 
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6.5  MULTIPLEXER NOTE 
This interface is provided for backward compatibility. We recommend using 
the more efficient ID-NET™ network for Master/Slave or Multiplexer layouts. 
Each reader is connected to a Multiplexer (for example MX4000) with the RS485 half-duplex 
main interface through a CBX connection box. 
Before proceeding with the connection it is necessary to select the MUX32 communication 
protocol and the multidrop address for each reader. 
Figure 109 - Multiplexer Layout 
The auxiliary serial interface of the slave readers can be used in Local Echo communication 
mode to control any single reader (visualize collected data) or to configure it using the 
VisiSet™ utility. 
Each reader has its own reading phase independent from the others. When One Shot or 
Phase Mode operating mode is used, the reader can be activated by an External Trigger (for 
example a pulse from a photoelectric sensor) when the object enters its reading zone. 
MX4000 
Host
0 
1 
2 
3
  Main Serial Interface (RS485 Half-Duplex) 
  Auxiliary Serial Interface (Local Echo) (RS232) 
 External Trigger (for One Shot or Phase Mode) 
1 31 
33 
2 2
Power