http://www.m-system.co.jp/ MDPA-24 SPECIFICATIONS ES-8258 Rev.5 Page 1/4
Lightning Surge Protectors for Electronics Equipment M-RESTER
LIGHTNING SURGE PROTECTOR
FOR STANDARD SIGNAL LINE & PULSE USE
Functions & Features
• Designed specifically for 4 – 20mA DC and
pulse signal line including both 4-wire and 2- wire
transmitters
• Life monitor function helps you to decide when you should
replace the surge protector; reduces maintenance and
prevents downtime
• Pressing CHK (Check) button confirms the degradation
and life span of the surge protection circuits with LEDs
• Absorbs surges only without affecting instrumentation
signal
• No interruption of signal by unplugging surge protector
element
M·RESTER
MADE IN JAPAN
SER.NO
BAT
ALM
MODEL
MODEL: MDPA–24[1]
ORDERING INFORMATION
• Code number: MDPA-24[1]
Specify a code from below for [1].
(e.g. MDPA-24/BN)
[1] OPTIONS
Configuration
blank: With Base (model: SK-2E) included
/BN : Element only for replacement
(Not selectable with DIN rail mounting adapter)
DIN rail mounting adapter
blank: Without
/A33: With adapter (model A-33)
RELATED PRODUCTS
• Base (model: SK-2E)
GENERAL SPECIFICATIONS
Construction: Plug-in
Connection: M4 screw terminals (torque 0.8 N·m)
Screw terminal: Nickel-plated steel
Housing material: Flame-resistant resin (black)
Indicators: Activated by CHK (Check) button, see the status
table shown below.
BAT: Green LED
ALM: Red LED
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.
CHK button: Push button; momentary
Battery: Lithium; No recharge or replacement available.
Battery life: 10 years (when used ≤ 2 minutes/month)
Normal
: ON
*1. With pulsating line signal or that containing ripples, the LED may
flicker or blink when the voltage limiter is degraded.
: OFF
Normal
Discharged
Normal
Near End
End of Life
Unable to Judge
Normal
Degraded*
1
No Need
Near
BatteryALMBAT Discharge
Element Voltage
Limiter Replacement
Immediately
Required
Discharge element status table
INSTALLATION
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 85 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 150 g (0.33 lbs), standard
175 g (0.39 lbs), with DIN rail mounting adapter
PERFORMANCE
Max. continuous operating voltage (Uc):
Line to line: 30 V min
Line to earth: ±160 V min
Voltage protection level (Up):
• @ 1 kV (100 A)
Line to line: 45 V max.
Line to earth: ±650 V max.
• @ 2 kV (1 kA)
Line to line: 50 V max.
Line to earth: ±650 V max.
Response time:
Line to line: ≤ 4 nsec.
Line to earth: ≤ 20 nsec.
Leakage current:
Line to line: ≤ 5 μA @ 30 V DC
Line to earth: ≤ 5 μA @ ±140 V DC
Max. discharge current (Imax): 5000 A (8 / 20 μs)
Nominal current (IN): 100 mA
Internal series resistance: 20 Ω ±10 % (including return)
Capacitance @ 1 MHz:
