MODEL: R3-AR4

R3-AR4 SPECIFICATIONS

ES-8433 Rev.7 Page 4/4

https://www.m-system.co.jp/

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

INPUT 1

1

2

A

B

B

RTD

11

12

Input Circuit

INPUT 2

3

4

A

B

B

RTD

13

14

Input Circuit

INPUT 3

6

7

A

B

B

RTD

16

17

Input Circuit

INPUT 4

8

9

A

B

B

RTD

18

19

Input Circuit

Communication

Circuit

INTERNAL POWER

* For dual redundant communication.

Control

Circuit

DIP SW

RUN LED ERR LED

15

5

20

10

1

2

INPUT 1

3

4

INPUT 2

6

7

INPUT 3

8

9

INPUT 4

100Ω

11

13

16

18

• Unused Input Channels

Close across the unused input terminals with a resistor as

shown below and set the DIP switch for Pt 100 input.

Unused channels left open are equal to the burnout,

which turns the red ERR LED on and sets a burnout flag at the

PLC or the host device.

Connecting the resistor means approx. 0°C. An alarm setpoint

must be set to a value that does not trip an unwanted alarm.

Unused channels can be specified and set so on the PC

Configurator Software (model: R3CON) without needing to

connect resistors at the field terminals.

INTERNAL BUS A

INTERNAL BUS B *

Specifications are subject to change without notice.