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
EM-8203 Rev.2 P. 1 / 3
INSTRUCTION MANUAL
LIGHTNING SURGE PROTECTOR
FOR DC POWER SUPPLY USE
MODEL
MDP-D
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:
Surge protector ....................................................................(1)
DIN rail mounting adaptor* ...............................................(1)
Screws for DIN rail mounting (M4 × 8)* ...........................(2)
*Included with option code /A33
■
MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■
INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
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 cer-
tain extremely high voltages caused by a direct or almost
direct hit by lightning.
M-RESTER must be installed according to this installa-
tion / instruction manual.
GENERAL
■
FUNCTION & FEATURES
• Designed specifically for 12V/24V DC power supplies of
small capacity
• Absorbs surges only without affecting instrumentation
signal
• Monitor LED
■
SPECIFICATIONS
LINE TO LINE
LINE TO
EARTH
MDP-D12
MDP-D24
Max. continuous
operating voltage (Uc)
14V
27V
±160V
Voltage protection level (Up)
20V
40V
±650V
Leakage current
≤ 3mA
@14V DC
≤ 6mA
@27V DC
≤ 0.1mA
@±160V DC
Response time
≤ 4 nsec.
≤ 4 nsec.
≤ 20 nsec.
Max. line voltage
14V
27V
----
Max. discharge current (Imax)
5000A (8 / 20 µs)
Nominal current (I
N
)
1A
Internal series resistance
≤ 0.6Ω including return
POINTS OF CAUTION
■
CONFORMITY WITH EU DIRECTIVES
• The actual installation environments such as panel con-
figurations, connected devices, connected wires, may af-
fect the protection level of this unit when it is integrated
in a panel system. The user may have to review the CE
requirements in regard to the whole system and employ
additional protective measures to ensure the CE conform-
ity.
■
ENVIRONMENT
• When heavy dust or metal particles are present in the
air, install the surge protector inside proper housing with
sufficient ventilation.
• Do not install the surge protector where it is subjected to
continuous vibration. Do not subject the unit to physical
impact.
• Environmental temperature must be within -5 to +55°C
(23 to 131°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
■
DIELECTRIC STRENGTH TEST
• Loosen the screw located at the left-center of the element
and remove the element module from the base before
conducting a dielectric strength testing. Otherwise the
element will start discharging at a voltage exceeding the
max. continuous operating voltage (Uc), which can cause
insulation failure of the module.
Be sure to return the element and fasten securely after
the test.
■
AND ....
• We recommend that you keep spare surge protectors so
that you can replace them when necessary.
• Lightning surge can enter not only through power supply
lines but also through signal lines. We recommend that
you also use the surge protectors for signal line for suffi-
cient protection.
COMPONENT IDENTIFICATION
Ground Terminal (G)
(used as mounting bracket)
Head Element
Base
Specifications
Monitor LED
Head Element is secured to Base
with screw when the surge protector
is shipped from Factory.
MODE
L
