MDP-PM
P. 3 / 3
EM-8115 Rev.7
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
TERMINAL CONNECTION
Connect the unit as in the diagram below.
Be sure to cross-wire between the Ground terminal (G) and that of the protected equipment. When the surge protector is
connected with a device which has no ground terminal such like M-System’s, ground the M-Rester Ground terminal (G) only.
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.
■
GROUNDING
MAINTENANCE
Check surge protectors periodically. Many cases of light-
ning are ignored, and even lightning at a far distance often
causes inductive surges.
We recommend that you check your surge protector about
twice a year, before and after the rainy season. Check when-
ever you experience a strong lightning occurrence.
Checking procedure is explained in the following:
■
CHECKING
WIRING
1) Make sure that wiring is done as instructed in the con-
nection diagram.
2) Make sure that the Ground terminal (G) is connected to
the metallic housing of protected equipment.
3) Make sure that the Ground terminal (G) is grounded to
earth.
DISCHARGE FUNCTION
The M-Rester Tester is available for a preliminary checking
of the surge protector’s head element.
If checking of M-Rester tester shows negative, replace the
protector.
B
G
A
2
C
3
1
MDP-RB
B
G
A
2
C
3
1
MDP-RB
–
B
+
A
B
RTD XMTR
(PROTECTED EQUIPMENT)
OUTPUT
INPUT
V
U
POWER
A
B
B
RTD
