MODEL: MDP-DM3

MDP-DM3 SPECIFICATIONS

ES-8110 Rev.10 Page 2/4

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

CONNECTION EXAMPLES

(Protected Device)

(Protected Device)

C

B

3

2

MDP-DM3

G

A

1

3

2

MDP-DM3

Shielded Twisted-pair Cable

RS-422/485

Communication Line

G

C

B

A

1

FG

+

–

SHLD

FG

+

–

SHLD

Grounding

≤100Ω

Grounding

≤100Ω

*1

*1

*2

*2

*3

*3

*4

*4

*1. Applicable devices: M-System’s MsysNet or SIN-NET devices which employ RS-422/485 communication standards.

*2. Recommended cable length between the surge protector and the protected device: 1 meter at the maximum

*3. No connection is required if the protected device has no shield terminal.

*4. Cross wire between the protected device’s FG terminal and the surge protector’s G terminal, and ground to the earth

at the surge protector side.

Ground only the surge protector if the protected device has no FG terminal.

GROUNDING

M-RESTER

PROTECTED

EQUIPMENT

G

G

CROSSOVER WIRE

GROUNDING

(100 ohms or less)

A crossover wire between M-RESTER ground and the ground or

metallic housing of the equipment is required for protection.

If the protected equipment has no ground terminal, ground the

M-RESTER only.

When the M-RESTER is mounted with DIN Rail Mounting Adapter,

connect the grounding wire to the mounting screw of the M-RESTER.