MDP-LWA
P. / 4
EM-8234 Rev.
LIGHTNING SURGE PROTECTOR FOR
L
ON
W
ORKS
(FTT-10A)
MODEL
MDP-LWA
INSTRUCTION MANUAL
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)
■
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 certain
extremely high voltages caused by a direct or almost di-
rect hit by lightning.
M-Rester must be installed according to this installation
/ instruction manual.
GENERAL
■
FUNCTION & FEATURES
• Designed specifically for L
ON
W
ORKS
network
• No interruption of transmission signal by unplugging the
head element module
■
SPECIFICATIONS
POINTS OF CAUTION
■
ENVIRONMENT
• When heavy dust or metal particles are present in the air,
install the surge protector inside proper housing with suf-
ficient 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.
■
NETWORK SPECIFICATIONS
• The MDP-LWA is applicable to networks which consist
only of FTT-10A. Not applicable to the ones connected to
Link Power network.
• For detailed information on the network, refer to L
ON-
W
ORKS
FTT-10A Free Topology Transceiver User’s Guide
provided by Echelon.
■
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 signal lines
but also through power supply lines. We recommend that
you also use the surge protectors for power line for suf-
ficient protection.
COMPONENT IDENTIFICATION
Ground Terminal (G)
(used as mounting bracket)
Base
Element is secured to Base
with screw when M-RESTER is
shipped from Factory.
M•RESTER
MADE IN JAPAN N1430
B
Lot.N
O
MODEL
Head Element
Specifications
LINE TO
LINE TO
SHLD TO
LINE
EARTH
EARTH
Max. continuous
±1.5V min ±100V min ±160V min
operating voltage (Uc)
Voltage protection level ±40V max ±350V max ±650V max
(Up) @2kV (1kA)
Leakage current
≤0.15mA
≤20µA
≤±20µA
@±1.5V
@±100V
@±160V
Capacitance @1 MHz ≤200 pF
≤200 pF
≤30 pF
Response time
≤4 nsec.
≤20 nsec.
≤20 nsec.
Max. discharge current
5000A (8 / 20 µs)
(Imax)
Nominal current (I
N
)
100mA
Internal series resistance
≤3.3Ω including return
Max. line voltage
±1.5V
Input attenuation
-1 dB max. @DC...100 kHz, Z
0
= 50Ω
