Omron NT20S - Page 278

1
14
25
13
1
6
9
5
259
Method for Making the Cable for Connection to the Host
Appendix G
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

in
the figure).
Connect the cable shielding wire to the connector cover and pin 1 at both the NT20S and CPU ends of the cable.
1
2
3
4
5
6
7
8
9
Pin
number
Abbrevi-
atioon
SD
RD
RS
CS
–
–
–
SG
RS-232C
interface
Shielding
wire
NT20S PC CPU
RS-232C
interface
Pin
number
Abbrevi-
atioon
1
2
3
4
5
6
7
–
–
FG
SD
RD
RS
CS
–
SG
–
–
9-pin connector

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: CV500-LK201
S Electrical characteristics: Complies with EIA RS-232C
S Signal direction: Signal input and output is relative to the PC.
Communication Port 1 (25-pin Connector)
Connector Pin
Signal Name
Abbreviation
Signal Direction
Connector
Pin
No.
Signal Name
Abbreviation
Input Output
Connector cover
Frame ground FG – –
1 Frame ground FG – –
2 Send data SD (TXD) f
3 Receive data RD (RXD) f
4 Request to send RS (RTS) f
5 Clear to send CS (CTS) f
7 Signal ground SG (GND) – –
8 Carrier detected CD (DCD) f
14 Optical connector +5V +5V – f
20 Data terminal ready ER (DTR) f
Communication Port 2 (9-pin Connector)
Connector
Signal Name
Abbreviation
Signal Direction
Connector
Pin No.
Signal Name
Abbreviation
Input Output
Connector cover
Frame ground FG – –
2 Send data SD (TXD) f
3 Receive data RD (RXD) f
4 Request to send RS (RTS) f
5 Clear to send CS (CTS) f
9 Signal ground SG (GND) – –