Omron Programmable Terminals NT31 NT31C - Manual (Page 107)

5-1 Section Connecting to the Host’s RS-232C Port
96
The relay terminal board is not included in the figure below. Insert a relay termi-
nal board so as to achieve the wiring configuration indicated below.
:
RS-485
NT31/NT31C Host
1
14
13 25
1
14
13 25
:
NT31/NT31C side
Shielding wire
(25-pin type)
Abbreviation
FG
−
SD
RD
RS
CS
−
SG
−
TRM
RDB (+)
SDB (+)
−
−
−
SDA ( −)
RDA ( −)
−
−
RSB (+)
RSA ( −)
−
Pin number
Connector
hood
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
−
23
24
25
RS-232C/
422A/485
connector
RS-232C/
422A/485
connector
Abbreviation
FG
−
SD
RD
RS
CS
−
SG
−
TRM
RDB (+)
SDB (+)
−
−
−
SDA ( −)
RDA ( −)
−
−
RSB (+)
RSA ( −)
−
Pin number
Connector
hood
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
−
23
24
25
(25-pin type)
NT31/NT31C side
*2
Make the connection pin numbers 9 and 10 at the terminal NT31/NT31C (marked
: in the figure above).
In order to avoid an FG ground loop, make the connection between the connec-
tor hood and the shielding at the one side only.
Connecting an NT-AL001 and Host
RS-232C
NT31/NT31C Host
NT-AL001
Wiring when connecting a CS1-series CS1G/H Serial Communications Board,
CQM1H Serial Communications Board, or C-series C200HX/HG/HE(-Z)E Com-
munications Board.
Applicable PCs:
CS1G-CPU42-E(V1) CS1G-CPU43-E(V1)
CS1G-CPU44-E(V1) CS1G-CPU45-E(V1)
CS1H-CPU63-E(V1) CS1H-CPU64-E(V1)
CS1H-CPU65-E(V1) CS1H-CPU66-E(V1)
Connection between
NT31/NT31C Units
(RS-485)