MODEL: MD7DP

MD7DP SPECIFICATIONS

ES-8052 Rev.8 Page 2/2

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

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

8

6

5

4

1

2

3

7

4

1

5

2

6

3

8

7

7

[.28]

98 [3.86]

(1.5 [.06])

8–M3 EURO

TERMINAL

DIN RAIL

(35 mm wide)

DIN RAIL

ADAPTOR

WIRE INSERTION ANGLE: approx. 20°

MONITOR LED

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

Grounding *5

5

2

6

3

7

8

DISCHARGE

ELEMENT

INDICATOR

CIRCUIT

4

5

6

8

4

1

2

3

7

1

Surge

Side

Surge

Side

Protected

Side

Protected

Side

DC Power

Supply

(protected)

Electronic

Device

(protected)

FG

+

–

POWER

INPUT

MONITOR LED

SAFETY

FUSE

MONITOR LED

–

+

–

+

DISCHARGE

ELEMENT

INDICATOR

CIRCUIT

FG

+

–

MD7DP

MD7DP

*1

*1

*2

*3

*1. The MD7DP is not applicable to protect two-wire transmitters. To protect two-wire transmitters,

model MD7ST designed to yield only small leakage current is suitable.

Confirm the polarity of the terminals when connecting this module to a protected device.

*2. Use a DC power source with the overload current protection function. (maximum output current 1.2A)

*3. Install a current limiting element (capacity 1.2A) when the output current exceeds 1.2A.

*4. Oxide coating of an aluminium rail may lower the electric conductivity between this module and the ground.

Use a steel or copper rail.

*5. Be sure to ground the DIN rail. Recommended grounding resistance ≤100Ω

*6. Cross-wire between the DIN rail and the metal housing of the protected device to equalize the earth potential.

Ground only the surge protector when the protected device has no ground terminal.

SAFETY

FUSE

DIN RAIL ADAPTOR

(for grounding)

DIN RAIL

DIN RAIL ADAPTOR

(for grounding)

DIN RAIL

Grounding

Crossover Wire

*4

*4

*5

*6

Crossover Wire*

6

VOLTAGE

LIMITER

VOLTAGE

LIMITER

Specifications are subject to change without notice.