Galvanically separated I.S. barriers RIZUR-ISKRA-301
RIZUR-ISKRA-301 are used in explosion-proof areas for power supply and signal reception transmitted by the explosion protected sensors. 4...20mA signals from the sensors are transferred through a two-wire circuit.
RIZUR-ISKRA-301 have a galvanic separation of the circuits. The device is mounted onto a DIN-rail or a wall, converts the 4…20mA signals into 0…5mA, 0…20mA or 4…20mA. Sensors with NAMUR signal and discrete output signals can be connected to the device. RIZUR-ISKRA-301 are single-channel.
Advantages RIZUR-ISKRA-301:
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strong noise-immunity,
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possibilty to use one power source for several circuits,
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provide signal conversion,
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small size,
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has short-circuit relay protection installed,
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low cost,
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different mounting options,
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grounding is not required.
Switching power supply installed in the I.S. barrier RIZUR-ISKRA-301 powers the input and output circuits of the device transferring the current signal from the explosion-hazardous area to the explosion-proof one. Galvanic separation of the circuits allows not to have device grounding.
In case there’s a sudden rise in voltage, optocouple and converter – elements that galvanic separation is based on – will prevent it from entering the intrinsically safe circuit. If there’s high voltage in, for example, the stabilizer, then the I.S. barrier will prevent it from entering the explosion-hazardous area.
RIZUR-ISKRA-301 devices are manufactured in accordance with the requirements of technical regulations of the Customs Union TR TS 012/2011 on the "Safety of equipment intended for use in explosive atmospheres". Conformity certificate № ЕАЭС RU C-RU.HA91.B.00029/19 is issued by the certification body OOO SC "ENDURENCE".Explosion protection parameters RIZUR-ISKRA-301:
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explosion protection marking [Ех iа Gа] IIC/IIВ,
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maximum output voltage Uo = 25.2 V,
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maximum output current Io = 100 mA,
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maximum output power Po = 0.63 W,
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maximum external capacitance Co = 0.08 µF (IIC), 0.5 µF (IIB),
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maximum external inductance Lo = 0.5 mH (IIC), 5 mH (IIB).