KEYENCE N-R4 - Manual (Page 2)

2 E N-R4-IM
• States of RS-422A/485 changeover switch and terminating
resistance switch
* The factory setting is RS-485 communication mode and terminating
resistance OFF.
■ When connecting RS-422A or RS-485 (1:1 connection)
■ RS-485 connection (multi-drop connection)
* At the end of the RS-485 trunk line, set the terminator to ON.
■ Connecting the code reader
Connect the code reader to the head port of the N-R4.
Pin layout of the head port
■ Connecting the power supply
Connect the 24 VDC power supply to the power terminal of the N-R4.
The dimensions of crimp contacts used for wiring should be as follows:
■ Layout and Wiring of the I/O Terminal Block
• Layout of the I/O terminal block
Part Names and Functions
Number Name Function
1 Head port Used to connect the head.
2 Power LED Lights when the power is ON.
3
Communication status
LED
Monitors the status of communication with the
head.
4
RS-422A/485
connector
Used to connect to the host (personal
computer, PLC).
5 I/O status LED Monitors the ON/OFF status of I/O terminals.
6 I/O terminals
Used to connect I/O signal lines of control
units.
7 Power terminal Terminal for 24V DC power supply input.
8 DIN rail mounting tab A tab for mounting the DIN rail.
9
RS-422A/485
changeover switch
Used to switch between RS-422A and 485
communications.
10
Terminating resistance
switch
Used to switch between ON and OFF of the
terminating resistance.
Number
RS-422A
communication mode
RS-485
communication mode
Terminating
resistance ON
1 Left Right -
2 Left Right -
3 - - Right
System Configuration Figure
8. DIN rail mounting tab
1. Head port
2. Power LED
3. Communication
status LED
4. RS-422A/485
connector
5. I/O status LED
6. I/O terminals
7. Power terminal
9. RS-422A/485
changeover switch
10. Terminating
resistance switch
KV -B 16X C
Head port
OUT1 to 4 IN1
Head
BL Series
SR Series
Personal
computer
Timing sensor
RS-422A
or RS-485
RS-232C RS-485
Personal
computer
PLC
RS-485 master unit
N-410
Head (BL Series, SR Series)
Connection and Wiring Methods
Pin
number
Name Signal name
Signal
direction
1 OUT1 OUT1 input Input
2 OUT2 OUT2 input Input
3 RXD RS-232C Receive Input
4 RTS RS-232C Receivable Output
5 OUT4 OUT4 input Input
6 IN2 IN2 output Output
7 TXD RS-232C Transmit Output
8 CTS RS-232C Transmittable Input
9 OUT3 OUT3 input Input
10 IN1 IN1 output Output
11 +5V +5V power supply Output
12 GND(SG) Common GND -
CAUTION
Install and remove connection cables with the power
disconnected.
CAUTION
Using a power supply other than 24 VDC may cause
product failure.
Terminal Dimensions
Round Terminal a: 6 mm Max.
Y terminal a: 6 mm Max.
Item Description
Wire size AWG14-22
Tightening torque 0.49 N·m (4.34 lbf·in)
Wire material Copper
Wire type Stranded wire
Electric wire
temperature rating
+60 °C max.
Symbol Description
Signal
direction
INCOM Common for IN terminal -
IN1
Used as an input terminal for the code reader. Input
IN2
OUTCOM Common for OUT terminal -
OUT1
Used as an output terminal from the code reader. Output
OUT2
OUT3
OUT4
Note
• For connection, use stranded copper wire having a
gage of AWG16 to 26 and temperature rating of 60 °C
or higher.
• The tightening torque is 0.19 N·m (1.7 lbf·in).
3
7
4
8
5
1 2
9
11 12
6
10
Round 12-pin jack
Power supply
24V+10%
-20%
Twist pair cable
I/O terminal
block