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Connecting to the Host’s RS-422A/485 Port Section 5-2
For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS-
422A/485 Cables on page 125.
Wiring When Connecting a CVM1/CV-series CPU Unit
Applicable Units:
CVM1/CV-series CPU Units whose model names do not have the suffix -EV@
cannot be connected by any connection method.
For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS-
422A/485 Cables on page 125.
Wiring for a Memory Link Connection
Prepare the adapter cable while referring to the following diagram.
For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS-
422A/485 Cables on page 125.
CV500-CPU01-EV1 CV1000-CPU01-EV1
CV2000-CPU01-EV1
CVM1-CPU01-EV@ CVM1-CPU11-EV@
CVM1-CPU21-EV@
6
5
9
1
SDA (-)
SDB (+)
−
−
−
RDB (+)
−
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
Shielding wire
Short-circuit tool
NT631/NT631C side
PLC side
(9-pin type)
Pin number
1
2
3
4
5
6
7
8
9
Abbreviation
FG
−
RDA (-)
Abbreviation
RDA (-)
TRM
RDB (+)
SDA (-)
SDB (+)
RSA (-)
RSB (+)
RS-422A/
485
terminal
block
RS-422A
terminal
block
Connector
hood
Functional
ground
6
5
9
1
PS
CS
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
Shielding wire
Short-circuit tool
SDA (-)
SDB (+)
−
−
RDB (+)
−
NT631/NT631C side
PLC side
(9-pin type)
Pin number
1
2
3
4
5
6
7
8
9
Abbreviation
FG
RDA (-)
Abbreviation
RDA (-)
TRM
RDB (+)
SDA (-)
SDB (+)
RSA (-)
RSB (+)
RS-422A/
485
terminal
block
RS-422A
terminal
block
Connector
hood
Functional
ground
NT631/NT631C side
Host side
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
Abbreviation
RDA (-)
TRM
RDB (+)
SDA (-)
SDB (+)
RSA (-)
RSB (+)
Shielding wire
Short-circuit tool
Abbreviation
SDA (-)
SDB (+)
RS
CS
RDA (-)
RDB (+)
RS-422A/
485
interface
RS-422A
connector
Connector
hood
Functional
ground