Simplex Annunciator LEDs glowing dimly when not in alarm
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Fact 2001 WSA Annunciator FAA 200 2001 1017 Zone Module P N 556 082 Annunciator outputs are pins H and 11 Annunciator LEDs glowing dimly when not in alarm Cannot totally shut off Annunciator LEDs There is a 0V potential through a 10K ohm resistor connected to the annunciator output in the off state There is apparently sufficient current flow through this resistor to keep the LED dimly WSA may have change LED specification with no internal resistor in LED device Add an additional current limiting resistor in series with the point input wire of the LED The value of resistor can be 10K 15K 20K