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Connecting to the Host’s RS-232C Port Section 5-1
Reference: When using RS-485 as a port for the NT631/NT631C, only NT Link (1:N)
method (standard or high-speed) can be used.
Connecting an NT631/NT631C and NT-AL001 (RS-422A)
For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS-
422A/485 Cables on page 125.
Connecting an NT631/NT631C and NT-AL001 (RS-485)
For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS-
422A/485 Cables on page 125.
Reference: When using RS-485 as a port for the NT631/NT631C, only NT Link (1:N)
method (standard or high-speed) can be used.
Connecting an NT-AL001 and Host
RS-422A
NT631/NT631C
Host
NT-AL001
NT631/NT631C side
Pin number
6
5
4
3
1
Abbreviation
RDA (-)
RDB (+)
SDA (-)
SDB (+)
7
5
3
1
8
6
4
2
NT-AL001 side
Shielding wire
Abbreviation
RDA (-)
TRM
RDB (+)
SDA (-)
SDB (+)
RSA (-)
RSB (+)
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
RS-422A/
485
terminal
block
RS-422A
terminal
block
Short-circuit
tool
Functional
ground
Functional
ground
6
5
4
3
1
RDA (-)
RDB (+)
SDA (-)
SDB (+)
NT631/NT631C side
NT-AL001 side
Shielding wire
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
RS-485
NT631/NT631C
Host
NT-AL001
7
5
3
1
8
6
4
2
RDA (-)
TRM
RDB (+)
SDA (-)
SDB (+)
RSA (-)
RSB (+)
Pin number
Abbreviation
Abbreviation
RS-422A/
485
terminal
block
RS-422A
terminal
block
Short-circuit
tool
Functional
ground
Functional
ground
RS-232C
NT631/NT631C
Host
NT-AL001