MODEL: MD7TC

MD7TC SPECIFICATIONS

ES-8053 Rev.9 Page 3/6

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

DESCRIPTIONS

With Shield

Cable

Shield

Not Grounded

Shield to Signal

Isolated

Shield to Signal

Not Isolated

FF

Shield

Grounded

FG

Shield

Not Grounded

GF

Shield

Grounded

GG

Without Shield

Signal to Earth

Isolated

Signal to Earth

Not Isolated

FF

GG

• The surge protector has a dedicated shield terminal effective for easy shield wiring and surge protection.

• Review the shield method (grounding, non-grounding, connecting to SG, etc.) required by the protected device or system.

• There is no electrical effect to the shield by installing the surge protector, but an appropriate shield terminal type must be

selected to suit user applications.

• Refer to the flow chart below to choose.

■ SELECTING SHIELD TERMINAL TYPE

CONNECTION EXAMPLES

M-RESTER

5

2

8

4

1

(SHLD)

DIN RAIL

DIN RAIL

ADAPTOR

Protected Device

FG

Protected Side

Crossover Wire

Surge Side

*1. Oxide film on the surface of an aluminium rail may lower the electric conductivity between this module and the ground.

Use a steel or copper rail.

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

*3. 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.

*4. Shield wiring method is an example. Proceed according to the system requirements.

*4

*2

*3

7

M-RESTER

T/C

2

5

7

1

4

DIN RAIL

DIN RAIL

ADAPTOR

Surge Side

Protected Side

Sheath or

Metal Enclosure

*2

*1

*1

8

SG

INPUT

+

–

Compensating

Leadwire

Compensating

Leadwire

Compensating

Leadwire

+

–