Nt-Al001 Rs-232C/Rs-422A Link Adapter - Omron CJ2 CPU UNIT User Manual

Dimensions (Unit: mm)
5.8

NT-AL001 RS-232C/RS-422A Link Adapter

The NT-AL001 RS-232C/RS-422A Link Adapter is used to connect to devices that have RS-232C or
RS-422A terminals. It is connected with a cable to the RS-232C port on a CJ2 CPU Unit. It is iso-
lated, so the maximum distance for RS-422A is 500 m.
Appearance
DIP Switch Settings
There is a DIP switch on the NT-AL001 RS-232C/RS-422A Link Adapter that is used to set RS-
422A/485 communications parameters. Set the DIP switch as required for the serial communica-
tions mode according to the following table.
Pin
1 Not used. (Leave set to ON.)
2 Internal terminating resistance setting.
ON: Terminating resistance connected.
OFF: Terminating resistance not connected.
3 2-wire/4-wire setting
4
Both pins ON: 2-wire communications
Both pins OFF: 4-wire communications
5 Communications mode*
6
Both pins OFF: Always send.
5 OFF/6 ON: Send when RS-232C's CS is high.
5 ON/6 OFF: Send when RS-232C's CS is low.
* When connecting to a CJ-series CPU Unit, turn OFF pin 5 and turn ON pin 6.
CJ2 CPU Unit Hardware User's Manual
38.8 18.2
Function
Appendices
Default
setting
ON
ON
OFF
OFF
ON
OFF
A-115