MODEL: R3-RS8A

R3-RS8A SPECIFICATIONS

ES-8407 Rev.9 Page 4/5

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

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

INPUT 1

1

2

A

B

B

A

B

B

A

B

B

A

B

B

RTD

3

Input Circuit

INPUT 2

4

5

RTD

A

B

B

A

B

B

A

B

B

A

B

B

RTD

RTD

6

Input Circuit

INPUT 3

7

8

RTD

9

Input Circuit

INPUT 4

10

11

RTD

12

Input Circuit

INPUT 5

15

16

17

Input Circuit

INPUT 6

18

19

20

Input Circuit

INPUT 7

21

22

23

Input Circuit

INPUT 8

24

25

26

Input Circuit

Communication

Circuit

INTERNAL POWER

INTERNAL BUS A

INTERNAL BUS B*

*For dual redundant communication.

Control

Circuit

DIP SW

RUN LED ERR LED

27

13

28

14

• Unused Input Channels

Close across the unused input terminals with a resistor as shown below and set the DIP switch for an RTD.

The resistance value must match the RTD type (100Ω for Pt 100).

1

2

INPUT 1

4

5

INPUT 2

7

8

INPUT 3

10

11

INPUT 4

3

6

9

12

15

16

INPUT 5

17

18

19

INPUT 6

20

21

22

INPUT 7

23

24

25

INPUT 8

26

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.

Unused channels can be specified and set so on the PC Configurator Software (model: R3CON) without needing

to connect resistors at the field terminals.