Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 282)

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Appendix E

Wiring Connections
The NT600S does not use pin 4 (RS) or pin 5 (CS). Either short the RS and CS pins of the PC connector together
or set the CTS setting selector switch at the rear face of the host link unit to “0V” (see

in the figure).
Connect the cable shielding wire to the connector cover and pin 1 at the host link unit end of the cable only.
1
2
3
4
5
6
7
8
9
Pin
number Abbrevi-
atioon
FG
SD
RD
RS
CS
--
--
SG
RS-232C
interface
RS-232C
interface
Pin
number Abbrevi-
atioon
1
2
3
4
5
6
7
8
--
FG
SD
RD
RS
CS
--
SG
--
--
Shielding
wire
25-pin connector
NT600S PC (host link unit)
--
--
--
ER
--
--
--
20
+5V

Connecting an NT600S to a C-Series CPU (C



H)

C-Series CPU Unit (C



H) 9-pin Connector Specifications
 Applicable CPU: C20H/C28H/C40H/C60H
 Electrical characteristics: Complies with EIA RS-232C
 Signal direction: Signal input and output is relative to the PC.
Connector
Signal Name Abbreviation
Signal Direction
Connector
Pin No.
Signal Name Abbreviation
Input Output
1 Frame ground FG -- --
2 Send data SD (TXD)

3 Receive data RD (RXD) 
4 Request to send RS (RTS) 
5 Clear to send CS (CTS) 
7 Signal ground SG (GND) -- --