MD73W
EM-8061 Rev.4 P. 3 / 4
■
Figure 1. GROUNDING
M-RESTER
PROTECTED
EQUIPMENT
FG
CROSSOVER WIRE
Cross-wire from the DIN rail to the metal housing of the protected device
to equalize the ground potential.
Ground only the surge protector when the protected device has no
grounding terminal.
DIN RAIL ADAPTOR
(for grounding)
DIN RAIL
Grounding
■
CAUTION WHEN WIRING
Hold the module steady at the front when you
tighten/loosen screw terminals.
■
CONNECTION DIAGRAM
Protected Side
Surge Side
M-RESTER
5
2
6
3
7
8
DISCHARGE
ELEMENT
4
5
6
8
4
1
2
3
7
1
Surge Side
Protected Side
M-RESTER
DIN RAIL ADAPTOR
(for grounding)
DIN RAIL
DIN RAIL ADAPTOR
(for grounding)
DIN RAIL
Grounding
DISCHARGE
ELEMENT
Receiver
FG
Transmitter
FG
*
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. Install a circuit protector if the excitation supply rating is greater than the maximum load current of the surge protector.
*
2
Grounding
*
2
*
1
*
1
Crossover Wire
*
3
*
4
Crossover Wire
*
3
+
+
–
+
+
–
DISCHARGE
ELEMENT
DISCHARGE
ELEMENT
056 222 38 18
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