Mitsubishi QJ71MB91 - Page 154

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6.5 Connection to a Target Device
6.5.2 How to connect the RS-422/485 interface
6
PRE-OPERATIONAL PROCEDURES AND SETTINGS
(c) Connection for 1:n communications when host is slave
1) When performing 1:n communication with third party master station (RS-422/
485 interface)
< For 4-wire communications >
< For 2-wire communications >
Figure 6.16 Connection (for 1:n communication, 4 wires) when host is slave
Figure 6.17 Connection (for 1:n communication, 2 wires) when host is slave
RDA
SG
FG
SDA
R
R
SDB
RDB
RDA
SG
FG
SDA
SDB
RDB
RDA
SG
FG
SDA
SDB
RDB
RDA
SG
FG
SDA
SDB
RDB
R
R
Terminating
resistor
Terminating
resistor
Terminating
resistor
QJ71MB91 QJ71MB91
Terminating
resistor
Third party
slave
Third party
master
QJ71MB91QJ71MB91
R R
RDA
SG
FG
SDA
SDB
RDB
RDA
SG
FG
SDA
SDB
RDB
RDA
SG
FG
SDA
SDB
RDB
RDA
SG
FG
SDA
SDB
RDB
Terminating
resistor
Third party
slave
Third party
master