DSP-19 User Manual
Page 14 of 24
DSP19_MAN_A
Detect LED
–
The red Detect LED is used to display the status of the main output. There are several different
statuses that can be displayed on this LED:
Off
No vehicle present in the detection area or the detector has identified a fault and
has deactivated the main output because it is in fail-secure operation.
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.
The main output will be activated during this time.
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. The main output will be deactivated
during this time.
Main Output Active
A vehicle is detected and has activated the main output.
Figure 5: Detect LED States
