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R3-RS8B

P. 3 / 3

EM-8341

CONNECTION DIAGRAM

WIRING INSTRUCTIONS

n

 SOLDERLESS TERMINAL  mm (inch)

Refer to the drawing below for recommended ring tongue 
terminal size.  Spade tongue type is also applicable.  Solder-
less terminals with insulation sleeve do not fit.  Applicable 

wire size: 0.3 – 0.5 mm

2

3.2 (.13) dia.

4 min.

(.16)

12 (.47) max.

6 max.

(.24)

3 (.12) max.

INPUT 1

1

2

A

B

B

RTD

3

INPUT 2

4

5

A

B

B

RTD

6

INPUT 3

7

8

A

B

B

RTD

9

INPUT 4

10

11

A

B

B

RTD

12

INPUT 5

15

16

A

B

B

RTD

17

INPUT 6

18

19

A

B

B

RTD

20

INPUT 7

21

22

A

B

B

RTD

23

INPUT 8

24

25

A

B

B

RTD

26

BUS CONNECTOR

INTERNAL 

POWER

BUS A

BUS B*

*For dual redundant communication.

• 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).

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.

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

M-SYSTEM WARRANTY

M-System warrants such new M-System product which it manufactures to be free from defects in materials and workmanship during the 36-month period following the date that such 
product was originally purchased if such product has been used under normal operating conditions and properly maintained, M-System’s sole liability, and purchaser’s exclusive 
remedies, under this warranty are, at M-System’s option, the repair, replacement or refund of the purchase price of any M-System product which is defective under the terms of this 
warranty.  To submit a claim under this warranty, the purchaser must return, at its expense, the defective M-System product to the below address together with a copy of its original 
sales invoice.
THIS IS THE ONLY WARRANTY APPLICABLE TO M-SYSTEM PRODUCT AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED 
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  M-SYSTEM SHALL HAVE NO LIABILITY FOR CONSEQUENTIAL, INCIDENTAL OR 
SPECIAL DAMAGES OF ANY KIND WHATSOEVER.
M-System Co., Ltd., 5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN, Phone: (06) 6659-8201, Fax: (06) 6659-8510, E-mail: [email protected]

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