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ADM1026JST
ADM1026JST

... 5. Total analog monitoring cycle time is nominally 273 ms, made up of 18 ms  11.38 ms measurements on analog input and internal temperature channels, and 2 ms  34.13 ms measurements on external temperature channels. 6. The total fan count is based on two pulses per revolution of the fan tachometer ...
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... Figure 5-24: LCL Behaviour under repetitive overload and UVP activation. .......................... 45 Figure 5-25: Complex payload with an internal distribution system ....................................... 46 Figure 5-26: LCL followed by a switch .................................................. ...
type b tpn distribution boards
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... The SPN boards are rated at 125A as standard and available in 5 sizes with a choice of 4, 7, 10, 13 and 16 single pole outgoing ways. A choice of metering solutions are available as standard, providing clear electrical consumption information as well as a permanent capability of visualising informat ...
Intrinsically Safe Interfaces - Isolators
Intrinsically Safe Interfaces - Isolators

... presence of flammable gases or vapors, flammable liquids, combustible dusts, or easily ignitable fibers or flyings. Although, flammable gases, vapors and combustible dusts exist almost everywhere, fortunately, they are present only in minute quantities. Simply because flammable gases or vapors, or c ...
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Piezoelectric fibers for sensing and actuation at ultrasonic and audio frequencies
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PSPICE Lecture #1 - Faculty Websites
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CMOS Analog Design Lecture Notes Rev 1.5L_02_06_11
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... Principle of a PV plant with Sunny Boy ...
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Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
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