Omron NT20S Operation Manual page 70

Connection to a PC by the NT Link (1:N)
Converter Unit Connector Specifications
Terminal Screws and Crimp Terminals
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 265).
NT-AL001 RS-422A terminal block specifications
S Connected terminal block RS-422A terminal block (M3 screws)
S Electrical characteristics
S Signal direction
Terminal
Block Pin Block Pin
No.
8
7
6
5
4
3
2
1

The CSA and CSB signals are for special applications.
The terminal screws are M3 screws. Use M3 size crimp terminals. Tighten the ter-
minal screws with a torque of 0.4 N·m.
Note: During wiring, crimp terminals must be used for connections.
[Recommended crimp terminals]
6.2mm or less
Maker
Japan Solderless
Terminal MFG
Molex
Conform to EIA RS-422A
Signal input and output is relative to the NT-AL001.
Signal Name Signal Name
Request to send (*)
Request to send ())
Receive data (*)
Receive data ())
Send data (*)
Send data ())
Signal ground
Functional ground
Fork Type
6.2mm or less
Type
1.25-N3A (Fork)
Y1.25-3.5L (Fork)
Abbreviation Abbreviation
CSA
CSB
RDA
RDB
SDA
SDB
SG (GND)
Round Type
Recommended Wire Size
AWG22 to 18 (0.3 to 0.75mm AWG22 to 18 (0.3 to 0.75mm
Section 2-6
Signal Direction
Input Output
* *
* *
2 2
) )
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