![background image](http://html1.mh-extra.com/html/omron/nt620c/nt620c_operation-manual_744559063.webp)
2-7
Section
Connection to a PC by the NT Link (1:N)
50
Converter Unit Connector Specifications
The terminal block specifications of the RS-232C/RS-422 converter unit are indi-
cated here. For details on the method for making the connection cable, refer to
“Making the Cable” (page 310 of the appendix).
NT-AL001 RS-422A terminal block specifications
S
Connected terminal block RS-422A terminal block (M3 screws)
S
Electrical characteristics
Conform to EIA RS-422A
S
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 (A)
CSA (CS–)
f
7
Request to send (B)
CSB (CS+)
f
6
Receive data (A)
RDA (RD–)
f
5
Receive data (B)
RDB (RD+)
f
4
Send data (A)
SDA (SD–)
f
3
Send data (B)
SDB (SD+)
f
2
Signal ground
SG (GND)
–
–
1
Functional ground
–
–
* The CSA and CSB signals are for special applications.
Terminal Screws and Crimp Terminals
The terminal screws are M3 screws. Use M3 size crimp terminals. Tighten the
terminal screws with a torque of 0.4 N
@
m.
Note
During wiring, crimp terminals must be used for connections.
[Recommended crimp terminals]
Fork type
6.2 mm or less
Round type
6.2 mm or less
Maker
Type
Recommended Wire Size
Japan Solderless
Terminal MFG
1.25-N3A (fork)
AWG22 to 18
(0 3 to 0 75 mm
2
)
Molex
Y1.25-3.5L (fork)
(0.3 to 0.75 mm
2
)
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
Page 3: ...iv...
Page 5: ...vi...
Page 328: ......
Page 329: ......