MODEL: MDM2AT

MDM2AT SPECIFICATIONS

ES-8229 Rev.3 Page 1/3

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

Lightning Surge Protectors for

Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR

STANDARD SIGNAL LINE & PULSE USE

(life monitor, 24 V, 48 V or 65 V DC line voltage,

photovoltaic system, instrument shelter)

Functions & Features

• Designed specifically for 4 – 20 mA DC and pulse signal

lines

• Absorbs surges only without affecting instrumentation

signal

• Life monitor function helps you to decide when you should

replace the surge protector; reduces time and effort for

maintenance and prevents downtime

• LED display and alarm output indicate the degradation

and life span of the surge protection circuits

• Wide range of operating temperature from -20 to +70°C

(-4 to +158°F)

29.5 [1.16]

76

[2.99]

124

[4.88]

Model

ALM

PWR

mm [inch]

MODEL: MDM2AT–[1]–[2]

ORDERING INFORMATION

• Code number: MDM2AT-[1]-[2]

Specify a code from below for each of [1] and [2].

(e.g. MDM2AT-24-M2)

[1] NOMINAL VOLTAGE

24: 24 V DC

65: 48 V or 65 V DC

[2] 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.)

GENERAL SPECIFICATIONS

Construction: Plug-in

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

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. 7.5 μA.

Life time judged: When the number of discharges of the

discharge element reaches the expected life span.

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

the discharge elements has ended, when the voltage limiter

has degraded, and/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 @ 1 mA

INSTALLATION

Power consumption

•AC: ≥ 2.3 VA at 100 V

≥ 3.5 VA at 200 V

≥ 4.6 VA at 240 V

•DC: ≥ 1.7 W

Operating temperature: -20 to +70°C (-4 to +158°F)

Storage temperature: -30 to +70°C (-22 to +158°F)

Operating humidity: 10 to 90 %RH (non-condensing)

Mounting: Surface or DIN rail

Weight: 150 g (0.33 lb)

PERFORMANCE

Max. continuous operating voltage (Uc):

Line to line: 30 V (24 V DC use), 70 V (48 V or 65 V DC use)

Line to earth: ±140 V

Voltage protection level (Up):

Line to line: 45 V max. (24 V DC use), 100 V max.

(48 V or 65 V DC use)

Line to earth: ±650 V max.

Response time: ≤ 0.1 μsec.

Leakage current:

Line to line: ≤ 5 μA @ max. voltage