Omron Programmable Terminals NT631 Setup Manual page 137

Connecting to the Host's RS-422A/485 Port
Connecting between
NT631/NT631C Units
Connecting an NT631/NT631C and a Host
120
NT631/NT631C
RS-422A
:
NT631/NT631C side
RDA
Abbreviation
TRM
RDB
RS-422A/
485
SDA
interface
SDB
RSA
RSB
24V
+DC
* Short TRM and RDA terminals of the NT631/NT631C at the end of the RS-
422A cable (* marked in the above figure) using the short-circuit tool sup-
plied with the NT631/NT631C.
For details on handling shield wires, refer to 5-2-8 Handling the Shield on RS-
422A/485 Cables on page 125.
NT631/NT631C
Wiring When Connecting a CS-series Serial Communications Board, CS/
C-series Serial Communications Unit, C-series C200HX/HG/HE(-Z)E
Communications Board, or CQM1H Serial Communications Board
Applicable Units:
CS1W-SCU31-V1
CJ1W-SCU31-V1/CJ1W-SCU41(-V1)
CS1G-CPU42/43/44/45-E(V1)
CS1H-CPU63/64/65/66/67-E(V1)
CS1G-CPU42H/43H/44H/45H
CS1H-CPU63H/64H/65H/66H/67H
CS1D-CPU66H/67H (See note.)
C200HE-CPU32/42-(Z)E
C200HG-CPU33/43/53/63-(Z)E
C200HX-CPU34/44/54/64-(Z)E
Host
NT631/NT631C side
Short-circuit tool
Abbreviation
:
RDA (-) RDA (-)
TRM
TRM
RDB (+) RDB (+)
SDA (-) SDA (-)
SDB (+) SDB (+)
RSA (-)
RSA (-)
RSB (+)
RSB (+)
Functional
Functional
ground
ground
Shielding wire
RS-422A
Section 5-2
RDA
TRM
RDB
RS-422A/
485
SDA
interface
SDB
RSA
RSB
24V
+DC
Host