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LT-MD Explosion-Proof Signal Surge Protector
Application scope and characteristics

         Type signal lightning protection device based on IEC61643-21, GB18802.21 and YD1542 design to install the LT-MD Ex series by nature, hot pluggable module design, unplug the lightning protection module, signal feedthrough, insert the lightningproof module, the signal from the lightning protection module by in the detection or replacement of the module, signal transmission without interruption.

        The wide application of surge protection in the essential safety class bus system and all kinds of current loop signals.

Simple diagram of principle


This product is connected in the signal circuit of the equipment, is installed with 35mm standard guide rail, and multiple circuits are installed in multiple combinations. The input terminal 1, 2 (IN) is connected to the signal channel, the output end 1 '2' (OUT) is connected to the signal processing equipment.

Technical parameter
Model LT-MD/6 LT-MD/12 LT-MD/24
Rated working voltage Un(V-) 6 12 24
Maximum continuous operating voltage Uc(V-) 7.5 15 35
Nominal current I(mA) 200 200 200
Line line nominal discharge current ln(kA) 5 5 5
Line -PE nominal discharge current ln(kA) 10 10 10
Line and line impedance 2.5Ω 2.5Ω 2.5Ω
Line - line transmission frequency 20MHZ 20MHZ 20MHZ
Line - line capacitance <35PF <30PF <25PF
Line -PE capacitor <7PF <7PF <7PF
Installation method 35mm DIN-Rail Mounting
Test standard IEC61643-21
Authentication ATEX
Wiring diagram and installation size
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