MODEL: R3-RS8

R3-RS8 SPECIFICATIONS

ES-8365 Rev.10 Page 4/5

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

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

A

B

B

A

B

B

A

B

B

A

B

B

A

B

B

A

B

B

A

B

B

A

B

B

INPUT 1

1

2

RTD

3

Input Circuit

INPUT 2

4

5

RTD

6

Input Circuit

INPUT 3

7

8

RTD

9

Input Circuit

INPUT 4

10

11

RTD

12

Input Circuit

INPUT 5

15

16

RTD

17

Input Circuit

INPUT 6

18

19

RTD

20

Input Circuit

INPUT 7

21

22

RTD

23

Input Circuit

INPUT 8

24

25

RTD

26

Input Circuit

Communication

Circuit

INTERNAL POWER

*For dual redundant communication.

Control

Circuit

DIP SW

RUN LED ERR LED

27

13

28

14

• Unused Input Channels

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

INTERNAL BUS A

INTERNAL BUS B*

The resistance value must match the RTD type (100Ω for Pt 100, 50Ω for Pt 50Ω).

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 specied and set so on the PC Congurator Software (model: R3CON) without needing

to connect resistors at the eld terminals.

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