Appendix 6 Universal Serial Communications
App6-11
MJ2 (V706 only) Specifications as an RS-422 Connector
The pins of modular jack 2 correspond to signals as given below.
•
Wiring
Perform wiring as shown below.
<4-wire system>
<2-wire system>
CAUTION
To use an MJ2 on a V706 as an RS-422 connector, set the slide switch on the V706 to
the lower position: RS-422.
For details, refer to the separate V706 Hardware Specifications.
MJ2
Pin No.
Signal Name
Contents
1
+SD
RS-422 + send data
2
−
SD
RS-422
−
send data
7
+RD
RS-422 + receive data
8
−
RD
RS-422
−
receive data
Pin No.
Name
Signal Name
Signal Direction (V Series
←→
Communication Device)
1
Send data
+SD
2
Send data
−
SD
7
Receive data
+RD
8
Receive data
−
RD
1 2 3 4 5 6 7 8
SG
+SD
−
SD
+RD
−
RD
SHELL
1
2
7
8
FG
RDA
RDB
SDA
SDB
* Use twist-shielded cables.
V706 (MJ2)
General-purpose
computer
Signal
Name
Pin No.
Signal
Name
SG
+SD
−
SD
+RD
−
RD
SHELL
1
2
7
8
FG
RDA
RDB
SDA
SDB
* Use twist-shielded cables.
V706 (MJ2)
General-purpose
computer
Signal
Name
Pin No.
Signal
Name
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