Omron NT20S - Page 280

1
6
9
5
261
Method for Making the Cable for Connection to the Host
Appendix G
Connecting an NT20S to a C-Series C200HS, C200HX/HG/HE, CPM1, CQM1, CVM1/CV-Series (-EVj)CPU
S C-Series C200HX/HG/HE, CPM1, CQM1, CVM1/CV-Series (-EVj) CPU Unit 9-pin Connector Specifications
Applicable CPU:
CQM1-CPU21-E CV2000-CPU01-EVj C200HS-CPU33-E C200HX-CPU34-E
CQM1-CPU41-E CVM1-CPU01-EVj C200HE-CPU32-E C200HX-CPU44-E
CQM1-CPU42-E CVM1-CPU11-EVj C200HE-CPU42-E C200HX-CPU54-E
CQM1-CPU43-E CVM1-CPU21-EVj C200HG-CPU33-E C200HX-CPU64-E
CQM1-CPU44-E C200HS-CPU21-E C200HG-CPU43-E
CV500-CPU01-EV1 C200HS-CPU23-E C200HG-CPU53-E
CV1000-CPU01-EV1 C200HS-CPU31-E C200HG-CPU63-E
Note: The host link function incorporated in CV/CVM1 CPUs (with the exception of -EVj) cannot be used.
S Electrical characteristics: Complies with EIA RS-232C
S 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
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) – –
S Wiring Connections
The NT20S 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).
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 (host link unit)
RS-232C
interface
Pin
number
Abbrevi-
atioon
2
3
4
5
–
–
–
9
FG
SD
RD
RS
CS
–
–
–
SG
9-pin connector
Connector
cover
