MODEL: MDJST

MDJST SPECIFICATIONS

ES-8156 Rev.7 Page 1/3

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

Lightning Surge Protectors for

Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR

STANDARD SIGNAL LINE

(fast response: 3 nsec.)

Functions & Features

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

line

• Battery-powered status indicator

• High discharge current capacity 20 kA (8/20 μs)

• Shield terminal provided

• Compatible with IEC 61643-21 categories C1, C2, D1.

26(1.02)

93

(3.66)

137

(5.39)

mm (inch)

MODEL: MDJST–[1][2]

ORDERING INFORMATION

• Code number: MDJST-[1][2]

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

(e.g. MDJST-24Y)

[1] NOMINAL VOLTAGE

12: 12 V DC

24: 24 V DC

48: 48 V DC

[2] STATUS INDICATOR

A1: Monitor LED

A2: Monitor LED and alarm output

Y: None

GENERAL SPECIFICATIONS

Construction: Plug-in

Surge protection type: Surge energy limiting type

Connection: M3.5 screw terminals (torque 0.8 N·m)

Screw terminal: Nickel-plated steel

Housing material: Flame-resistant resin (black)

Status indicator

Monitor LED: Green, activated by Check button

ON in normal operating

OFF in degradation of the voltage limiter or battery

discharged

Degradation judged: When the leakage current at the

voltage limiter exceeds approx. 50 μA. 1 V or more is

necessary for the signal (line to line) voltage.

Check button: Push button; momentary

Alarm output: Open collector

28 V DC @ 100 mA (resistive load)

OFF in normal conditions

ON in degradation of the voltage limiter or

battery discharged

Saturation voltage 3.5 V DC

Battery: Lithium-metal battery (model: ER3N4); Non-

rechargeable and non-replaceable

Battery life: 10 years (when used ≤ 2 minutes/month)

INSTALLATION

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

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

Mounting: Surface or DIN rail; Standard Rack Mounting

Frame BX-16H available

Weight: 230 g. (0.51 lb)