Model: QJ71C24N.
RS-232: 1 channel.
 RS-422/485: 1 channel.
 total transmission MITSUBISHI QJ71MT91 speed of 2 channels: 230.4 kbps
Model: QJ71MB91
MODBUS RS-232.
RS-422/485 configurable as MITSUBISHI QJ71MT91 master or slave 
Model: 
QJ71GP21S-SXMulti-mode MITSUBISHI QJ71MT91 fiber optic cable.
 dual loop.
 controller network (control/normal station).
 with external power supply function
Model: QJ71AS92
Master station.
 QJ71MT91 AS-Interface Specification Version 2.11 compatible
   
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