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 ...................................................(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 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
• Specifically designed to protect 4 to 20mA DC signal line
including both 4-wire and 2-wire transmitters from dam-
age caused by lightning surges
• Absorbs surges only without affecting transmitted sig-
nals.
■
SPECIFICATIONS
BETWEEN LINES
LINE TO GND
Discharge voltage
30V min.
±290V min.
Max. surge voltage*
40V max.
±650V max.
Leakage current
≤5µA
@30V DC
≤5µA
@±290V DC
Response time
≤0.1 µsec.
Discharge current
5000A (8 / 20 µsec.)
Maximum load current
100mA
Internal series resistance
20Ω ±5%
Maximum line voltage
30V
*
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
■
ENVIRONMENT
• When heavy dust or metal particles are present in the at-
mosphere, 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
(23 to 131°F) and relative humidity within 30 – 90% RH
in order to ensure adequate life span and operation.
■
DIELECTRIC STRENGTH TEST
• The unit will start discharging when 290V or greater
voltage is applied bewteen lines and ground. DO NOT
perform dielectric strength tests with wires connected to
the unit.
■
AND ....
• We recommend that you keep spare M-RESTERs so that
you can replace them when necessary.
• Lightning surge can enter not only through signal lines
but also through power supply lines. We recommend that
you also use the Lightning Arrester for Power Lines for
sufficient protection.
COMPONENT IDENTIFICATION
Body
Specification
Label
Connection
Diagram Label
LIGHTNING SURGE PROTECTOR FOR
STANDARD SIGNAL LINE USE
MODEL
MDK-24
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-8134 Rev.4 P. 1 / 3
INSTRUCTION MANUAL
