Iskra Zascite

SMI2 SeriesDATA/SIGNAL LINES PROTECTIONIEC category / EN type: D1/C1/C2/C3 (IEC 61643-21)Design: Replaceable plug-in module 12 mmAvailable voltages: 5, 12, 15, 24, 30, 48, 60, 110V DCFreq: 30MHzSurge Discharge Ratings: I n:20kA 8/20µs; I max: 30kA 8/20µs; I imp: 10kA 10/350µsLoad current: 1AEnclosure:DIN 43880 2/3TE, DIN rail mountTerminal:Multi-strand to 4mm 2Technical characteristicsTypeProtection constructionNumber of protected pairsNominal operating voltageMax. continuous operating voltageRated spark overvoltageUnUc(a/b-PG)(a-b)Rated operating current at 25oCI LNominal discharge current (8/20µs) I nMax. discharge current (8/20µs) ImaxLightning impulse current ( 10/ 350µs) IimpResidual voltage at 5 kA (8/20µs)Response timet AThermal protectionInsulation resistance of the protectionSerial resistance RTransverse capacitance CLimit frequency f GTerminal cross sectionOperating temperatureDegree of protectionHousing materialDimensions DIN 43880Mounting EN 60715Ordering code Base + Replaceable plug-in moduleReplaceable plug-in moduleDimensional drawingsThe SMI2 series provides the same electrical performance as the SMH2-TC series but with a greater surge withstand levelor Iimp 10kA, (2,5 kA per line). It is intended for operation in electrical environments where higher exposure to the effects ofdirect or partially direct lightning currents may be experienced. These include wind turbines and PV installations wherelightning exposures are more severe, but where protection of sensitive electronics, such as environmental sensors, is justas crucial. These barriers provide both coarse and fine protection stages and offer longitudinal and transverse protection.The initial protection stage comprises a three-pole gas discharge tube and is designed to divert the primary surge energy.The subsequent fine protection stage is implemented using fast bi-directional silicon avalanche diodes. Special designtechniques have been employed in the design of the fine protection stage to avoid capacitive line loading and therebyensure a low insertion loss and wide operating frequency range. Series line impedance are used to ensure energy coordinationbetween the coarse and fine protection stages irrespective of the magnitude of the incident surge. To protectagainst the hazards of electric shock and fire, which may result when power frequency contact occurs between power andcommunication lines (often called mains incursion), a thermo-clip is included in the primary protection stage to divert thepower frequency current to ground.The plug-in module/base design facilitates replacement of a failed module without the need to remove system wiring.If the module is unplugged from the base, the through-connection is maintained, allowing continued operations while areplacement module is ordered.5V5V DC6V DC7 - 10V7 - 10V1A20kA30kA10kA< 22V< 1ns≥ 6KΩ1.6-2.0Ω50pF30MHz708 301708 31112V12V DC15V DC16 - 21V16 - 21V1A20kA30kA10kA< 42V< 1ns≥ 15MΩ1.6-2.0Ω50pF30MHz708 302708 312Connection diagramSMI215V 24V 30V 48VTwo parts: base and extractable insert2 (4 conductors)15V DC18V DC21 - 25V21 - 25V1A20kA30kA10kA< 48V< 1ns≥ 18M Ω1.6-2.0Ω50pF30MHz708 303708 31324V DC28V DC31 - 37V31 - 37V1A20kA30kA10kA< 70V< 1ns30V DC33V DC36 - 44V36 - 44V1A20kA30kA10kA< 80V< 1nson a 35mm DIN rail708 304 708 305708 314 708 31548V DC52V DC57 - 69V57 - 69V1A20kA30kA10kA< 140V< 1nsThermo-clip≥ 28MΩ≥ 33MΩ1.6-2.0Ω1.6-2.0Ω50pF 50pF30MHz 30MHzMulti-strand to 4 mm 2- 40oC ... + 80oCIP 20Thermoplastic; gray, extinguishing degree V-O12mm≥ 52MΩ1.6-2.0Ω50pF30MHz708 306708 31660V60V DC64V DC68 - 84V68 - 84V1A20kA30kA10kA< 160V< 1ns≥ 64MΩ1.6-2.0Ω50pF30MHz708 307708 317110 V110V DC170V DC184 - 264V184 - 264V1A20kA30kA10kA< 450V< 1ns≥ 170MΩ1.6-2.0Ω50pF30Mhz708 308708 318GDTR71.5RDBGDTR9012Legend:bGDT gas discharge tubeaR resistorDB diode blockPG protective grounding PGPGdcLINERDBa b c d d’ c’ b’ a’d’c’EQUIPb’a’www.iskrazascite.si15