Omron NT20S Operation Manual page 278

Method for Making the Cable for Connection to the Host
S Wiring Connections
The NT20S does not use pin 4 (RS) or pin 5 (CS). Short the RS and CS pins of the PC connector together (see
the figure).
Connect the cable shielding wire to the connector cover and pin 1 at both the NT20S and CPU ends of the cable.
NT20S
RS-232C
interface
Connecting an NT20S to a CVM1/CV-Series Host Link Unit
S CVM1/CV-Series Host Link Unit Connector Specifications
S Applicable host link unit:
S Electrical characteristics:
S Signal direction:
Communication Port 1 (25-pin Connector)
1
14
25
13
Communication Port 2 (9-pin Connector)
1
5
Abbrevi- Pin
atioon number
1
SD 2
RD 3
RS 4
CS 5
– 6
– 7
– 8
SG 9
CV500-LK201
Complies with EIA RS-232C
Signal input and output is relative to the PC.
Connector Pin Connector Pin
No.
Connector cover
1
2
3
4
5
7
8
14
20
Connector Connector
6
Pin No.
Connector cover
2
3
4
5
9
9
PC CPU
Pin
number
1
2
3
4
5

6
7
–
Shielding
–
wire
9-pin connector
Signal Name Signal Name
Frame ground
Frame ground
Send data
Receive data
Request to send
Clear to send
Signal ground
Carrier detected
Optical connector +5V
Data terminal ready
Signal Name Signal Name
Frame ground
Send data
Receive data
Request to send
Clear to send
Signal ground
Abbrevi-
atioon
FG
SD
RD
RS-232C
RS
interface
CS
–
SG
–
–
Abbreviation Abbreviation
FG
FG
SD (TXD)
RD (RXD)
RS (RTS)
CS (CTS)
SG (GND)
CD (DCD)
+5V
ER (DTR)
Abbreviation Abbreviation
FG
SD (TXD)
RD (RXD)
RS (RTS)
CS (CTS)
SG (GND)
Appendix G

in
Signal Direction
Input Output
– –
– –
f
f
f
f
– –
f
f
–
f
Signal Direction
Input Output
– –
f
f
f
f
– –
259