MDJST Lightning Surge Protectors for Electronics Equipment M-RESTER
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Detail
·Some details are not shown. Please refer to specification sheets for all information.
MDJST
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.
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)
PERFORMANCE
Insulation resistance: ≥ 100 MΩ with 250 V DC (Line to alarm output)
(The voltage more than 250 V DC turns the discharge element on; then the insulation between lines and alarm output will be lost)
Surge protection: IEC 61643-21 Categories C1, C2, D1
EXTERNAL VIEW
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM
M-System Co., Ltd.
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PRODUCTS LIST
- Signal Conditioners
- 2-wire Signal Conditioners
- Power Transducers
- Indicators
- Tower Lights
- Limit Alarms
- Gateway, Remote IO
- Paperless Recording System
- PC Recorder
- Web Data Loggers
- PID Control Components
- BA&Energy Monitoring Components
- Temperature Controllers
- Electric Actuators
- Lightning Surge Protectors
STATISTIC
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