M-system MDP-LWA Instruction Manual

INSTRUCTION MANUAL

LIGHTNING SURGE PROTECTOR FOR

LONWORKS (FTT-10A)

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 cer­tain extremely high voltages caused by a direct or almost
direct hit by lightning.

M-RESTER must be installed according to this installa­tion / instruction manual.

GENERAL

■ FUNCTION & FEATURES

• Designed specifically for L

• No interruption of transmission signal by unplugging the
head element module

■ SPECIFICATIONS

Max. continuous
operating voltage (Uc)

Voltage protection level
(Up) @2kV (1kA)

Leakage current ≤ 0.15mA

Capacitance @1 MHz ≤ 200 pF ≤ 200 pF ≤ 30 pF
Response time ≤ 4 nsec. ≤ 20 nsec. ≤ 20 nsec.
Max. discharge current

(Imax)
Nominal current (IN) 100mA
Internal series resistance
Max. line voltage ±1.5V
Input attenuation

ONWORKS network

LINE TO

LINE

±1.5V ±100V ±160V

±40V ±350V ±650V

@±1.5V

-1 dB or less @DC...100 kHz, Z0 = 50 Ω

LINE TO

EARTH

≤ 20µA

@±100V

5000A (8 / 20 µs)

≤ 3.3 Ω including return

SHLD TO

EARTH

≤ ±20µA
@±160V

MODEL

MDP-LWA

POINTS OF CAUTION

■ 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.

■ 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-

WORKS 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 suffi­cient protection.

COMPONENT IDENTIFICATION

Head Element

Specifications

Lot.NO

M•RESTER

MODEL

Element is secured to Base
with screw when M-RESTER is
shipped from Factory.

MADE IN JAPAN N1430B

Base

Ground Terminal (G)

(used as mounting bracket)

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]

EM-8234 Rev.2 P. 1 / 4

INSTALLATION

(used as mounting bracket)

80 (3.15)

BASE

100 (3.94)

In order to separate the head element from the base, loosen the screw located at the left-center of the element.

■ WALL MOUNTING

Refer to the drawings below.

MDP-LWA

• EXTERNAL DIMENSIONS unit: mm (inch)

31.5 (1.24)

2–5 (.20) dia.
MTG HOLE

HEAD ELEMENT

23

1

80 (3.15)

90 (3.54)

45 (1.77)

6–M4 SCREW

C

B

A

GROUND TERMINAL (G)

■ DIN RAIL MOUNTING (Only for /A33)

1. MOUNTING ONTO THE ADAPTOR

Before DIN rail mounting, secure the mounting bracket of
MDP to the mounting adaptor with a screw provided with
this product. In this step, secure at one point.

• MOUNTING REQUIREMENTS

unit: mm (inch)

27 (1.06)53 (2.08)

33 (1.30) min.

90 (3.54)

2–M4 SCREW

3. GROUNDING

Secure the mounting bracket at the other point with the
other screw. In this step, secure the grounding wire togeth­er with the screw.

M•RESTER

2. DIN RAIL MOUNTING

Set the base socket so that its mounting slider is at the bot­tom. Position the upper hook at the rear side of base socket
on the DIN rail and push in the lower. When removing the
socket, push down the mounting slider utilizing a minus
screwdriver and pull.

DIN Rail

35 mm wide

DIN Rail Mounting Slider

M•RESTER

Solderless Terminal

• MOUNTING REQUIREMENTS unit: mm (inch)

80 (3.15)

8.5

[3.3 (.13)]

(.33)

45 (1.77)

4

2–M4 MOUNTING SCREW
(used as ground terminal (G))

DIN RAIL
35mm wide

(.18)

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]

EM-8234 Rev.2 P. 2 / 4