Instruction Manual

2-15
2-3 Connecting and Wiring to the N-R4 Series
Installation
2
RS-422A/RS-485 changeover switch and terminating resistance switch
Before using the N-R4, select either RS-422A or RS-485 communication using the switch on the unit.
Moreover, when the N-R4 is located at the end of the communication line, set the terminating
resistance switch (100 ) to ON.
Set the switches according to the table below.
* The factory setting is RS-485 communication mode and
terminating resistance OFF.
Number
RS-422A
communication
mode
RS-485
communication
mode
Terminating
resistance
ON
1 Left Right —
2 Left Right —
3— — Right