MODEL: MDW2A-4R

MDW2A-4R SPECIFICATIONS

ES-8215 Rev.2 Page 1/4

http://www.m-system.co.jp/

Lightning Surge Protectors for

Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR

RS-485 / RS-422

(life monitor)

Functions & Features

•Designed specifically for RS-485 or RS-422 transmission

line

•Life monitor function helps you to decide when you should

replace the M-RESTER; reduces maintenance and prevents

downtime

•LED indicator and alarm contact output indicate the

degradation and life span of the surge protection circuits

Model

ALM

PWR

88.5

(3.48)

29.5 (1.16)

mm (inch)

124

(4.88)

MODEL: MDW2A–4R–[1]

ORDERING INFORMATION

• Code number: MDW2A-4R-[1]

Specify a code from below for [1].

(e.g.MDW2A-4R-M2)

[1] POWER INPUT

AC Power

M2: 100 – 240 V AC (Operational voltage range 85 – 264 V,

47 – 66 Hz)

DC Power

R: 24 V DC

(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)

P: 110 V DC

(Operational voltage range 85 – 150 V, ripple 10 %p-p max.)

APPLICABLE NETWORK

RS-485 or RS-422 conformed network: Modbus, SINNET,

MsysNet

GENERAL SPECIFICATIONS

Construction: Plug-in

Connection: M3 screw terminals (torque 0.8 N·m)

Screw terminal: Chromated steel

Housing material: Flame-resistant resin (black)

Alarm indicators

PWR: The green LED turns on while the power is

supplied.

ALM: Tricolor LED (green/amber/red)

•Remains off when the power supply is first turned on.

•Green: The unit has received one or more surges.

•Amber: Replacement is recommended.

•Red: The life span has ended.

Degradation judged: When the leakage current at the

voltage limiter exceed approx. 0.25 mA.

Life time judged: When the number of discharges of the

discharge element reaches the expected life span.

Alarm contact: The N.C. contact is on when the life span of

the discharge elements has ended, when the voltage limiter

has degraded or when the power supply is removed.

Rating: 125 V AC @ 0.5 A (cos ø = 1)

30 V DC @ 1 A (resistive load)

Maximum switching voltage: 125 V AC or 110 V DC

Maximum switching power: 62.5 VA or 30 W

Minimum load: 5 V DC @ 10 mA

INSTALLATION

Power consumption

•AC:

Approx. 3 VA at 100 V

Approx. 4 VA at 200 V

Approx. 5 VA at 240 V

•DC: Approx. 2 W

Operating temperature: -5 to +55°C (23 to 131°F)

Operating humidity: 30 to 90 %RH (non-condensing)

Mounting: Surface or DIN rail

Weight: 200 g (0.44 lb)