Woodward 8273-126 Speed Interface with 4–20 mA Output

Product Brief Introduction Speed interface with both digital square wave and proportional 4–20 mA analog outputs, compatible with analog speed control systems and DCS interfaces.
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Technical Specifications Input: 50 mV–30 V AC, 10 Hz–15 kHz; Outputs: 24 V DC square wave + 4–20 mA proportional to speed; Supply: 24 V DC ±10%; Accuracy: ±0.5% full scale; Operating temperature: -40 °C to +85 °C; Enclosure: IP20.

Functional Features Dual digital + analog output; adjustable speed-to-current scaling; zero and span calibration; signal loss detection.

Application Scenarios DCS speed indication, analog governor system feedback, speed recorder input, speed signal distribution to multiple systems.

Performance Parameters Analog output linearity: ±0.5% FS; Frequency accuracy: ±0.05%; Response time: < 20 ms.

Material Composition Flame-retardant housing; frequency measurement circuit; V/I output stage; terminal blocks.

Structural Characteristics Rack plug-in module; front panel status LED; rear panel input/output terminals.

Working Principle Measures the frequency of the input speed signal, converts it to a proportional 4–20 mA analog current output, and simultaneously outputs a shaped digital square wave signal.

Installation Requirements Mount in control rack; connect speed input, analog and digital outputs; calibrate zero and span.




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