MODEL: R1M-P4

R1M-P4 SPECIFICATIONS

ES-5664 Rev.11 Page 4/7

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

MODBUS WIRING CONNECTION

R1M

T1

T2

T3

T4

R1M

T1

T2

T3

T4

T1

T2

T3

T4

R1M

RS-232-C

RS-485

*1. Internal terminating resistor is used when the device is at the end of a transmission line.

*2. Install shielded cables to all sections and ground them at single point.

FG

RS-485

CONNECTION DIAGRAM

RS-232-C

T3

T4

T2

T1

T7

T6

T5

Term.

Resist.

Output

Circuit

When the device is located at the end of a transmission line via twisted-pair cable,

(when there is no cross-wiring), close across the terminal T2 – T3 with the attached

jumper pin (or with a leadwire).

When the device is not at the end, remove the jumper pin.

*

Power

Circuit

+

–

Shielded Twisted-pair Cable

To Other

I/O Modules

Jumper*

FG

U (+)

V (–)

POWER

9

8

7

6

5

4

3

2

1

10

12

11

13

15

14

16

17

18

20

19

21

22

23

24

25

27

26

28

29

30

31

32

33

35

34

36

ch.A

ch.B

ch.C

ch.D

COM (–)

COM (–)

COUNTER RESET

ch.1

ch.2

ch.3

ch.4

ch.5

ch.6

ch.7

ch.8

COM (–)

ch.1

ch.2

ch.3

ch.4

ch.5

ch.6

ch.7

ch.8

COM (–)

I

0

Circuit

TOTALIZED

COUNTER

INPUT

CONTACT

INPUT

CONTACT

OUTPUT

DO NOT CONNECT to the terminals 5 thr. 8 or 10 thr. 16.

Wrong connection may cause failure of the device.

Caution: FG terminal is NOT a protective conductor terminal.