BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
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PACKAGE INCLUDES:
Lightning surge protector (body + base socket) ................(1)
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MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
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INSTALLATION / INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, and basic main-
tenance procedure.
LIMITATION APPLICABLE TO M-RESTER
The M-Rester will protect electronics equipment from
damage caused by lightning by absorbing most of the
surge voltages.
However, M-Rester may not be effective against certain
extremely high voltages caused by a direct or almost di-
rect hit by lightning.
M-Rester must be installed according to this installa-
tion/ instruction manual.
GENERAL
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FUNCTION & FEATURES
• Designed specifically for DC power supplies up to 5 amps
• Discharge current capacity 2000A
• Absorbs surges only without affecting instrumentation
signal
• Indicator LEDs ON with surge absorber failure
• Fuse provided for detaching the discharge elements
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SPECIFICATIONS
BETWEEN LINES
LINE TO GND
MDH-12
MDH-24
MDH-48
Discharge voltage 24V min. 50V min. 88V min. ±380V min
Max. surge voltage* 70V max. 140V max. 210V max. ±700V max.
Leakage current
≤15mA
@15V DC
≤15mA
@30V DC
≤20mA
@70V DC
≤1mA
@±380V DC
Response time
≤0.1 µsec.
Discharge current
2000A (8 / 20 µsec.)
Max. load current
5A
Voltage drop
≤1V
*The maximum voltage that could pass through M-RESTER.
Protected equipment must be able to withstand this voltage
for a very short time period.
POINTS OF CAUTION
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ENVIRONMENT
• When heavy dust or metal particles are present in the
atmosphere,
install M-RESTER inside proper housing and ventilate it.
• Do not install the M-RESTER where it is subjected to
continuous
vibration. Do not apply physical impact to the M-RESTER.
• Environmental temperature must be within -5 to +55°C
in order to
ensure adequate life span and operation.
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WIRING
• Remove cables connected to the ground terminals (2, 3, 6
or 7) from the base socket before conducting a dielectric
strength test. Otherwise the element will start discharg-
ing at discharge voltage, which can cause insulation fail-
ure. Be sure to return the cables as they were after the
testing is complete.
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RATED CURRENT
• Be sure that the rated current of protected equipment
does not exceed the maximum load current specification
of the M-RESTER.
• Be sure to install a breaker which matches the current
rating at the power source side of the M-RESTER.
COMPONENT IDENTIFICATION
Body
Base Socket
Specification
Label
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FRONT PANEL CONFIGURATION
Alarm LED (two)
LIGHTNING SURGE PROTECTOR FOR POWER SUPPLY USE
(DC power use)
MODEL
MDH
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-8169 Rev.5 P. 1 / 3
INSTRUCTION MANUAL
