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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, 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 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 to protect telecommunication equip-

ment from lightning surges entering through telecommu-
nication line network

 

SPECIFICATIONS

Btwn Lines

Line to Gnd

Discharge voltage

±190V min.

±180V min.

Max. surge voltage*

±500V max.

±900V max.

Leakage current

≤100µA

@±160V DC

≤100µA

@±160V DC

Response time

≤0.01 µsec

Discharge current capacity
  Modular jack connection
  Screw terminal connection

500A (8 / 20 µsec.)

 10000A (8 / 20 µsec.)

Max. load current

 200mA

Internal series resistance

Approx. ≤4Ω including return

Frequency band

Approx. 100 kHz/-3 dB

at 600Ω terminating resistance

Max. line voltage

±160V DC

*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

 

POWER INPUT RATINGS

• Power input ratings are specified by the model number 

suffix code. Check the power input voltage for the unit on 
the specification label.

AC power

: 85 – 264V, 47 – 66 Hz, approx. 2 – 4VA

DC power

: 24V ±10% or 85 – 150V, approx. 1.5W

 

UNPLUGGING THE UNIT

• Before you remove the unit from its base socket or mount 

it, turn off the power supply and the signal for safety.

 

ENVIRONMENT

• Indoor use
• When heavy dust or metal particles are present in the 

air, install the unit inside proper housing and ventilate it.

• Do not install the unit where it is subjected to continuous 

vibration. Do not apply physical impact to the unit.

• 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.

• Be sure that the ventilation slits are not covered with ca-

bles, etc.

 

WIRING

• Do not install cables (power supply, input and output) 

close to noise sources (relay drive cable, high frequency 
line, etc.).

• Do not bind these cables together with those in which 

noises are present. Do not install them in the same duct.

 

AND ....

• The unit is designed to function as soon as power is sup-

plied, however, a warm up for 10 minutes is required for 
satisfying complete performance described in the data 
sheet.

COMPONENT IDENTIFICATION

LINE

MODEM

Body

Base Socket

Specification Label

Connection Diagram

Label (side)

LIGHTNING SURGE PROTECTOR FOR

ANALOG TELECOM LINE USE (life monitor)

MODEL

MDA-TL

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-8205  Rev.1  P. 1 / 3

INSTRUCTION MANUAL

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