M-system MDH Instruction Manual

INSTRUCTION MANUAL
LIGHTNING SURGE PROTECTOR FOR POWER SUPPLY USE
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.
■ PACKAGE INCLUDES:
Lightning surge protector (body + base socket) ................(1)
■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■ 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
■ 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
■ SPECIFICATIONS
BETWEEN LINES
MDH-12
Discharge voltage 24V min.
Max. surge voltage* 70V max. 140V max. 210V max. ±700V max.
Leakage current ≤15mA
@15V DC
Response time
Discharge current
Max. load current
Voltage drop
*The maximum voltage that could pass through M-RESTER.
Protected equipment must be able to withstand this voltage
for a very short time period.
(DC power use)
LINE TO GND
MDH-24 MDH-48
50V min. 88V min. ±380V min
≤15mA ≤20mA ≤1mA
@30V DC @70V DC @±380V DC
≤0.1 µsec.
2000A (8 / 20 µsec.)
5A
≤1V
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
MODEL
POINTS OF CAUTION
■ 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.
■ 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.
■ 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
Specification
Label
■ FRONT PANEL CONFIGURATION
MDH
Base Socket
Alarm LED (two)
EM-8169 Rev.5 P. 1 / 3