User`s manual

1
1. Overview
This manual is written to provide proper information and instructions on
installation and wiring of the QJ71C24N, QJ71C24N-R2, QJ71C24N-R4,
QJ71C24 and QJ71C24-R2 serial communication modules (hereinafter referred
to as the serial communication module).
Check that the following items are included with the product package.
Model name Product name Quantity
QJ71C24N or QJ71C24 serial communication module 1
Terminal resistor for RS-422 communication 330 1/4 W
(Orange-Orange-Brown) *1
2
QJ71C24N or
QJ71C24
Terminal resistor for RS-485 communication 110 1/2 W
(Brown-Brown-Brown) *1
2
QJ71C24N-R2
or QJ71C24-R2
QJ71C24N-R2 or QJ71C24-R2 serial communication
module
1
QJ71C24N-R4 serial communication module 1
Terminal resistor for RS-422 communication 330 1/4 W
(Orange-Orange-Brown) *1
4
Terminal resistor for RS-485 communication 110 1/2 W
(Brown-Brown-Brown) *1
4
QJ71C24N-R4
Plate terminal for braided shield cable connection 4
1: Differentiate the terminal resistors as follows:
330
110
Brown
Orange Orange
Brown Brown Brown