Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 287)

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Appendix E
NT-AL001 RS-422A terminal block specifications
Connected terminal block: RS-422A terminal block (M3 screws)
Electrical characteristics: Conform to EIA RS-422A
Signal direction: Signal input and output is relative to the NT-AL001.
Terminal Block
Signal Name Abbreviation
Signal Direction
Terminal Block
Pin No.
Signal Name Abbreviation
Input Output
8 Request to send (--) CSA 
7 Request to send (+) CSB 
6 Receive data (--) RDA 
5 Receive data (+) RDB 
4 Send data (--) SDA 
3 Send data (+) SDB 
2 Signal ground SG (GND) -- --
1 Functional ground FG -- --
The CSB and CSA signals are for special applications.
Wiring
[For NT600S-ST211(B)-V
]
Shielding
wire
NT600S
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
SD
RD
RS
CS
+5V
--
--
SG
FG
SD
RD
RS
CS
+5V
SG
FG
SG
SDB
SDA
RDB
RDA
CSB
CSA
RS-232C
interface RS-232C
interface
RS-422A
interface RS-422A
interface
Pin No. Abbrev.
RS-232C
(9-pin)
NT-AL001
Abbrev.
(9-pin)
Abbrev.
Terminal
No.
Terminal block
Shielding
wire
Host
Signal Name
Ground for safety
Signal ground
Receive data (+)
Receive data (--)
Send data (+)
Send data (--)
Request to send (+)
Request to send (--)
*
*
RS-422A
Pin No.
[For NT600S-ST121(B)-V


]
Shielding
wire
NT600S
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
SD
RD
RS
CS
+5V
--
--
SG
FG
SD
RD
RS
CS
+5V
SG
FG
SG
SDB
SDA
RDB
RDA
CSB
CSA
RS-232C
interface RS-232C
interface
RS-422A
interface RS-422A
interface
Pin No. Abbrev.
RS-232C
(9-pin)
NT-AL001
(9-pin)
Abbrev.
Terminal
No.
Terminal block
Shielding
wire
Host
Signal Name
Ground for safety
Signal ground
Receive data (+)
Receive data (--)
Send data (+)
Send data (--)
Request to send (+)
Request to send (--)
*
*
RS-422A
+5V
(150mA)
Abbrev. Pin No.
(*) CSB and CSA are connected when the NT600S requires RS/CS control for the host control method.