6/30/2023 0 Comments Signal isolator for dc drive![]() Important Specifications When Choosing Opto-isolators They are particularly useful where long data cables that could be susceptible to induced voltage transients or ground plane surges enter an electronic device containing sensitive semiconductor components. ![]() ![]() There are many different types of optoisolator circuits that are widely used in communications, control, and monitoring systems where data signals could provide a point of ingress for harmful voltages to damage a device. The components are sealed in an opaque package to prevent interference from external light. This provides a barrier to any voltage transients or overvoltage levels that appear at the input from affecting the electrical circuit at the output of the optoisolator. Then, within the same device, a light-sensitive device such as a photodiode, phototransistor, or photodarlington transistor converts the light signal back into an electrical signal. In simplest terms, an optoisolator works by taking an input electrical signal and converting it into a light signal using a light-emitting diode, generally operating in the near-infrared spectrum. Opto-isolators act as a protection mechanism, ensuring that harmful electrical currents cannot flow across the device. ![]() Because there is no need to directly pass voltage or current between the inputs and outputs in an optoisolator circuit, these components can be used to provide electrical isolation in two regions in a PCB. SPECIFICATIONS NUMBER OF CHANNELS DRSL-LPI-1: 1 DRSL-LPI-2: 2 CURRENT INPUT Signal Range (Input to Output): 0 to 20.5 mA Signal Conversion: 1 to 1 Functional Range: 0 to 23 mA (NAMUR NE43 compliant) Start up Current: 10 ♚ typical Input Overload: 50 mA max Input to Output Voltage Drop: 1.25V + (0.015 x Vout) where Vout = Iout x Routput, typical Input Voltage Drop: (Unit voltage drop) + Vout CURRENT OUTPUT Output Load: 600Ω max Output Load Stability: 60 dB Cut-Off Frequency (3 dB): 100 Hz Response Time (0 to 90%, 100 to 10%): <5 ms Absolute Accuracy (at 25☌): ≤☑0 ♚ + 0.05% of max value of selected span Temperature Coefficient: ≤☒ ♚/☌ EMC Immunity Influence: <☐.5% of span Extended EMC Immunity NAMUR NE 21, A Criterion, Burst: <☑% of span ENVIRONMENTAL Operating Temperature: -25 to 70☌ (-13 to 158☏) Storage Temperature: -40 to 85☌ (-40 to 185☏) Calibration Temperature: 20 to 28☌ (68 to 82☏) Relative Humidity: 0 to 95% RH non-condensing Protection Degree: IP20 Installation Area: Pollution degree 2 and measurement/overvoltage category II MECHANICAL Dimensions: 113 H x 6.1 W x 115 mm D (4.4 x 0.24 x 4.5") Weight: 70 g (0.15 lb) approx DIN Rail Type: DIN EN 60715 - 35 mm Wire Size: 0.13 x 2.5 mm²/AWG 26 to 12 stranded wire Screw Terminal Torque: 0.An optoisolator is an electronic device that can be used to pass information between a diode without passing an electrical current. These isolators operates over a wide temperature range from -25 to 70☌ (-13 to 158☏). Measurement ranges are factory calibrated. Low power consumption facilitates DIN rail mounting without the need for any air gap. These units also eliminate ground loops and can be used for measuring floating signals. The DRSL-LPI series offers isolation between input and output, provides surge suppression and protects control systems from transients and noise. These units provide isolation and 1:1 conversion of standard current signals and are powered by the analog input current signal loop. The DRSL-LPI Series DIN rail input loop powered isolators provide a competitive choice in terms of both price and technology for galvanic isolation of current signals to SCADA systems or PLC equipment. ![]()
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