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current loop |
Also found in: Wikipedia | 0.07 sec. |
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A serial transmission method that uses a closed loop. It originated with teletype machines that transmitted 20 mA (milliamperes) of current for a 1 bit and the absence of current for a 0 bit. A 60 mA loop is also used for digital signals. A common analog current loop is 4-20 mA (4 to 20 mA), which is widely used for process automation. Current loops provide a better signal-to-noise ratio (SNR) than voltage-based systems. Contrast with RS-232. See 4-20 mA. |
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? Mentioned in | ? References in periodicals archive | |
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The DSPs used today allow blazingly fast servo feedback data, so the Servo HRV4 closes the current loop in 31. The module's A/D inputs are independently software selectable for 0-5V, 0-10V, +/-5V, and +/-10V ranges and can be configured for measuring 0-20mA current loop. The module's A/D inputs are independently software selectable for 0-5V, 0-10V, +/-5V, and +/-10V ranges and can be configured for measuring 0-20mA current loop. |
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current loop
