supervisory signal

supervisory signal

[¦sü·pər¦vīz·ə·rē ′sig·nəl]
(electricity)
A signal which indicates the operating condition of a circuit or a combination of circuits in a switching apparatus or other electrical equipment to an attendant.
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The actuation of a duct smoke detector shall activate a visible and audible supervisory signal at a constantly attended location.
The digital power management block in Figure 2b includes a multichannel ADC to digitize both output and supervisory signals, logic to implement closed-loop control algorithms, monitoring circuitry, a digital communications interface, and a power factor correction controller among other functions.
The current-loop and tonal systems never met this criterion because their supervisory signals repeated.

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