MD7PL
EM-8062 Rev.4 P. 4 / 5
MD7PL-NFG
6
3
8
5
2
(SHLD)
DIN RAIL
DIN RAIL
ADAPTOR
Protected Device
Protected Device
+
–
7
SG
4
1
+
6
8
5
7
4
FG
Protected Side
Crossover Wire
MD7PL-NFF
DIN RAIL
DIN RAIL
ADAPTOR
Surge Side
Protected Side
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 ≤100
Ω
*
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
Crossover Wire
*
3
3
2
1
•
MD7PL-N
MD7PL-PFG
6
3
8
5
2
(SHLD)
DIN RAIL
DIN RAIL
ADAPTOR
Protected Device
Protected Device
–
+
7
SG
4
1
–
6
8
5
7
4
FG
+
–
SG
+
FG
–
+
SG
–
FG
Protected Side
Crossover Wire
MD7PL-PFF
DIN RAIL
DIN RAIL
ADAPTOR
Surge Side
Protected Side
Surge Side
*
4
*
2
*
2
*
2
*
1
*
1
*
1
*
1
*
3
Crossover Wire
*
3
3
2
1
• MD7PL-P
■
CONNECTION DIAGRAM
■
COM TERMINAL
• To protect more than three (3) signals with shared common line, it must be connected to the COM terminals of all MD7PL module
s.
• Cross-wiring must be placed at the surge side of the MD7PL (terminal 6).
• Direct connection of the shared common line must be to the COM terminal of the MD7PL located closest to the grounding point.
• All MD7PL must be installed closely side by side on one DIN rail, so that the cross-wire be the shortest possible.
3
7
2
8
1
DIN RAIL
DIN RAIL
ADAPTOR
Protected Side
Surge Side
6
5
4
3
7
2
8
1
DIN RAIL
DIN RAIL
ADAPTOR
6
5
4
3
7
2
8
1
MD7PL
DIN RAIL
DIN RAIL
ADAPTOR
6
5
4
DI 1
DI 2
DI 3
DI 4
DI 5
DI
6
COM
Grounding
Di 1
Di 2
COM
Di 1
Di 2
COM
COM
COM
Do 1
Do 1
Do 2
Do 2
056 222 38 18
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AG
