Omron NT620S Operation Manual page 308

Method for Making the Cable for Connection to the PC
S Wiring connections
The NT620S/620C 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.
NT620S/620C
Abbreviation
RS-232C
interface
Connecting an NT620S/620C to a C-Series CPU (CjjH)
S C-series CPU unit (CjjH) 9-pin connector specifications
- Applicable CPU:
- Electrical characteristics:
- Signal direction:
1
6
9
5
Pin
number
FG 1
SD 2
RD 3
RS 4
CS 5
6
+5V
– 7
– 8
Shielding
SG 9
wire
C20H/C28H/C40H/C60H
Complies with EIA RS-232C
Signal input and output is relative to the PC.
Connector
Pin No. Pin No
1 Frame ground
2 Send data
3 Receive data
4 Request to send
5 Clear to send
7 Signal ground
PC (host link unit)
Pin
Abbreviation
number
1 FG
2 SD
3 RD
RS-232C
4
RS
interface
5 CS
<
6 –
7
SG
8
–
– –
–
–
– –
–
–
20 ER
25-pin
connector
Signal Name Signal Name
Appendix G
Signal
Direction
Abbreviation Abbreviation
Input Output
FG – –
f
SD (TXD)
f
RD (RXD)
f
RS (RTS)
f
CS (CTS)
SG (GND) – –
303