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Method for Making the Cable for Connection to the Host
Appendix G
Connecting an NT20S to an RS-232C/422A Converter Unit (NT-AL001)
Connecting an RS-232C/422A converter unit enables the transmission distance to be made greater than 15 m (up
to 500 m).
NT-AL001
Max. 2 m
Max. 500 m
Host
NT20S
RS-232C
RS-422A
Reference: When connecting the C200HX/HG/HE and an RS-232C/RS-422A converter unit, use a converter unit
whose lot number is 15Y5 or later. Converter units of lot numbers previous to 15Y5 cannot be con-
nected.
NT-AL001 RS-232C connector specifications (9-pin type)
Electrical characteristics: Comply with EIA RS-232C
Signal direction:
Signal input and output is relative to the NT-AL001
Connector
Signal Name
Abbreviation
Signal Direction
Connector
Pin No.
Signal Name
Abbreviation
Input
Output
Connector cover
Frame ground
FG
–
–
2
Send data
SD (TXD)
f
3
Receive data
RD (RXD)
f
4
Request to send
RS (RTS)
f
5
Clear to send
CS (CTS)
f
6
+5 V input
+5V
f
9
Signal ground
SG (GND)
–
–
NT-AL001 RS-422A terminal block specifications
Connected terminal block: RS-422A terminal block (M3 screws)
Electrical characteristics: Comply with EIA RS-422A
Signal direction:
Signal input and output direction is relative to the NT-AL001
Terminal No
Signal Name
Abbreviation
Signal Direction
Terminal No.
Signal Name
Abbreviation
Input
Output
1
Frame ground
FG
–
–
2
Signal ground
SG
–
–
3
Send data (+)
SDB
f
4
Send data (–)
SDA
f
5
Receive data (+)
RDB
f
6
Receive data (–)
RDA
f
7
Request to send (+)
CSB
f
8
Request to send (–)
CSA
f
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