Omron NT-series Programmable Terminal V022-E3-1 User Manual
Page 63
Note
$ '( )*+,
Section 2-6
Converter Unit Connector Specifications
The terminal block specifications of the RS-232C/RS-422A converter unit are indi-
cated here. For details on the method for making the connection cable, refer to
“Making the Cable” (page 272).
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 Pin
Signal Name
Abbreviation
Signal Direction
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
* The CSA and CSB signals are for special applications.
Converter Unit Terminal Screws and Crimp Terminals
The terminal screws are M3 screws. Use M3 size crimp terminals. Tighten the ter-
minal screws with a torque of 0.5 N·m.
During wiring, crimp terminals must be used for connections.
[Recommended crimp terminals]
Fork Type
Round Type
6.2mm or less
6.2mm or less
Maker
Type
Recommended Wire Size
Japan Solderless
Terminal MFG
1.25-N3A (Fork)
AWG22 to 18 (0.3 to 0.75mm
2
)
Molex
Y1.25-3.5L (Fork)
AWG22 to 18 (0.3 to 0.75mm
2
)