DSP-15 User Manual
Page 14 of 23
DSP15_MAN_C
Prior Fault
The detector is equipped with the ability to remember prior faults that
have occurred since the last power interruption or reset (changing a DIP
switch or the sensitivity). The LED will turn on for 1850 milliseconds, off
for 50 milliseconds, on for 50 milliseconds, off for 50 milliseconds and
then repeat the sequence until power is cycled or the detector reset.
Normal
The LED is always on when the detector is in its normal state of
operation.
Figure 6: Power LED States
Detect LED –
The red detect LED is used to display the status of the A output. There are several
different statuses that can be displayed on this LED:
Off
No vehicle present in the detection area.
Reset in Fail-safe
At the start of a reset event (a DIP switch change, sensitivity change, or
power cycle) the LED will turn off for 500 milliseconds, on for 500
milliseconds, off for 500 milliseconds, on for 500 milliseconds, and then
finally display its normal state.
Reset in Fail-secure
At the start of a reset event (a DIP switch change, sensitivity change, or
power cycle) the LED will turn off for 500 milliseconds, on for 500
milliseconds, blink repeatedly with 50 milliseconds on followed by 50
milliseconds off for one second, and then display its normal state.