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Terminal Blocks of RS-422/485
When connecting at the terminal block, mount the
terminal converter ZM-1TC (sold separately) to
the serial connector (CN1).
The RS-422 signal wiring of ZM-1TC is connected
to the serial connector (CN1).
Specify 4-wire connection or 2-wire connection by the dip switch on ZM-1TC (SW1).
(set to top: 4-wire connection)
Pin No.
1
7
12
13
Signal
FG
SG
+SD
-SD
24
25
+RD
-RD
SW1
RD+
RD-
SD-
FG
SD+
SG
(set to top:
4-wire connection)
ZM-1TC CN1
RS-422
In case of RS-422, +SD and -SD, and +RD and -RD form a pair.
Use SG if possible.
Connect the shielded cable to pin No. 1 or the connector case cover.
Use Terminal converter ZM-1TC which is the optional equipment in case of using terminal blocks in RS-
422/485 connection.
Specify terminal resistance by the dip switches on ZM-
**
. (Refer to the next page.)
Shielded cable
Signal
FG
Pin No.
+RD
-RD
+SD
-SD
1
24
25
12
13
To the RS-422 port
of the PC link module
SG 7
ZM-
**
(CN1)
Send data (-)
Send data (+)
Receive data (-)
Receive data (+)
SG
TB1
SW1
CN1
ZM-1TC (Terminal Converter)
CN2
MJ1MJ2
CN1
100-
240VAC
L
N
NC
1 Serial Connector (CN1)
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