Status indicator LEDs for Power, Signal and Output are clearly visible
beneath a raised dome in the sensor’s transparent o-ring-sealed Lexan®
cover. The Power indicator lights whenever power is applied to the sensor.
The Signal LED lights whenever the sensor sees its modulated light
source, and pulses at a rate proportional to the strength of the received
light signal; this is the AID™ Alignment Indicating Device*. The Output
indicator lights whenever the sensor’s output is conducting. This indicator
is especially useful when a timing logic module is used and Signal and
Output conditions are not concurrent.
Also located beneath the sensor’s o-ring-sealed cover are controls for
light/dark operate selection and Sensitivity adjustment.