1
6
9
5
1
6
8
5
7
3
4
2
262
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 Direction
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
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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