DSP-50 User Manual
Page 12 of 27
DSP50_MAN_A
The time it takes to complete the retuning process is dependent on the strength of the call being induced by the
vehicle. In the Normal Presence mode (DIP switch 7 off) this usually takes between 15 minutes and about 4
hours. In the Extended Presence mode (DIP switch 7 on) the retune process may take over 24 hours. This is
quite a long time, but it isn’t infinite. The DSP-50 does not have infinite presence.
When the retuning process is complete, any loop area that vehicles can still travel over will still detect the
vehicle as expected. Once the vehicle leaves, the detector will fully recover from the retuning process within 1
second.
DIP
Switch 7
Presence Time
OFF
Normal Hold Time
ON
Extended Presence
Factory Default
Output B Selection (DIP Switches 5 and 6)
Output B can be programmed to operate in one of four different modes that are selected using DIP switches 5
and 6. The available modes are modified by the loop / magnetometer operation mode selected. The following
table identifies the modes available in each of the operating modes:
DIP Switch
Output B Mode of Operation
5
6
Loop (DIP switch 8 off)
Magnetometer (DIP switch 8 on)
OFF
OFF
True Presence
Pulse on Entry
OFF
ON
Pulse on Entry
Pulse on Entry
ON
OFF
Pulse on Exit
Pulse on Entry
ON
ON
Fail
Fail
Factory Default
True Presence:
Output B will be activated whenever a vehicle is present over the loop detection area. Output A
can be modified by the delay / extension timing settings. Output B will not use these timing settings. For
example, if 2 seconds of delay is set, Output B will activate as soon as the vehicle is detected, while Output A will
wait for two seconds of continuous presence prior to activating. Both outputs will deactivate at the same time
when the vehicle finally leaves.
Pulse on Entry:
Every time the loop is occupied, a single 250 milliseconds pulse will be generated on Output B.
If the 2-second delay feature is active, the pulse will not occur until the sensor has been continuously occupied
for 2 seconds.
Pulse on Exit:
Every time the loop becomes vacant or a vehicle is tuned out, a single 250 milliseconds pulse will
be generated Output B. If extension time is selected, the pulse will occur after the extension time has
completed.
