MODEL: R3-AD4

R3-AD4 SPECIFICATIONS

ES-8437 Rev.8 Page 4/4

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

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

INPUT 1

250Ω

11

1

12

+

–

2

–

INPUT (CURRENT)

+

2W-XMTR (EXC)

INTERNAL POWER

INTERNAL BUS A

INTERNAL BUS B *

* For dual redundant communication.

Control

Circuit

Communication

Circuit

Excitation

Supply

Input Circuit

INPUT 2

250Ω

13

3

14

+

–

4

–

INPUT (CURRENT)

+

2W-XMTR (EXC)

Excitation

Supply

Input Circuit

INPUT 3

250Ω

16

6

17

+

–

7

–

INPUT (CURRENT)

+

2W-XMTR (EXC)

Excitation

Supply

Input Circuit

INPUT 4

250Ω

18

8

19

+

–

9

15

5

20

10

–

INPUT (CURRENT)

+

2W-XMTR (EXC)

Excitation

Supply

Input Circuit

DIP SW

RUN LED ERR LED

1

2

INPUT 1

3

4

INPUT 2

6

7

INPUT 3

8

9

INPUT 4

5kΩ (0.5W)

• Unused Input Channels

Close across the unused input terminals with a resistor

(5kΩ, 0.5W) as shown below.

Unused channels left open are equal to the input lower

than -15%, which sets a data abnormality at the PLC or

the host device.

Connecting the resistor means approx. 0% of the full-scale.

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.

Specifications are subject to change without notice.