Omron Programmable Terminals NT631 Setup Manual page 106

Connecting to the Host's RS-232C Port
Connection between
NT631/NT631C Units (RS-
485)
Connecting an NT-AL001 and Host
The relay terminal board is not included in the figure below. Insert a relay ter-
minal board so as to achieve the wiring configuration indicated below.
NT631/NT631C
RS-485
:
NT631/NT631C side
Abbreviation
RDA
RDA (-)
TRM
TRM
RS-422A/ RDB (+)
RDB
485
terminal SDA (-)
block
SDA
SDB (+)
RSA (-)
SDB
RSB (+)
RSA
Functional
ground
RSB
24V
+DC
* Short TRM and RDA terminals of the NT631/NT631C at the end of the RS-
485 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/
CJ-series Serial Communications Unit, CQM1H Serial Communications
Board, or C-series C200HX/HG/HE(-Z)E Communications Board
Applicable Units:
CS1W-SCU21(-V1)
CJ1W-SCU21(-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-CPU65H/67H (See note.)
Host
NT-AL001
NT631/NT631C side
Short-circuit tool
Abbreviation
:
RDA (-)
TRM
RS-422A/
RDB (+)
485
terminal
SDA (-)
block
SDB (+)
RSA (-)
RSB (+)
Functional
ground
Shielding wire
NT-AL001
RS-232C
Section 5-1
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
Host
89