DSP-50 User Manual
Page 18 of 27
DSP50_MAN_A
Extension Interval
A vehicle was detected but the detection zone is now empty and an
extension interval is being timed. The extension interval can be
programmed for no extension, 2 seconds, 5 seconds, or 10 seconds.
When the detection area becomes vacant, the extension timer will start
and the A output will continue to be activated. During this interval, the
LED will blink quickly at 50 milliseconds on and 50 milliseconds off. If
another vehicle enters the detection area during this interval, the
extension time is cancelled and the LED will return to the solid state.
Note: There is no delay interval for any newly arriving vehicle if a vehicle
is already in the detection area or the detector is in the extension
interval.
Output A Active
A vehicle is detected and any delay time has been timed or the detector
has identified a fault and has activated Output A because it is in fail-safe
operation.
Figure 6: Detect A LED States
Detect B LED –
The red Detect B LED is used to display the status of Output B. 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 Output B.
Reset
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.
