Omron NT20S Operation Manual page 72

Connection to a PC by the NT Link (1:N)
[RS-422A Cable Wiring (1)]
S RS-232C connection at the PC side
NT-AL001
Abbrev. Pin No.
Functional
ground
RS-422A
SDB
terminal
block
SDA
RDB
RDA
S RS-422A connection at the PC side
PC
Abbrev.
Connector cover
SDA
RS-422A
interface
SDB
RDA
RDB
[RS-422A Cable Wiring (2)]
NT-AL001
Abbrev. Pin No.
Functional
ground
RS-422A
SDB
terminal
block
SDA
RDB
RDA
1
3
4
5
6
Shielding
wire
Shielding
wire
1
3
4
5
6
Shielding
wire
Section 2-6
NT-AL001
Pin No. Abbrev.
Functional
1
ground
RS-422A
3
SDB
terminal
4 SDA block
5 RDB
6 RDA
NT-AL001
Pin No. Abbrev.
Functional
1
ground
3 RS-422A
SDB
terminal
4 SDA
block
5 RDB
6
RDA
NT-AL001
Pin No. Abbrev.
Functional
1
ground
RS-422A
3
SDB
terminal
block
4 SDA
5 RDB
6 RDA
53