DSP-22-1 User Manual
Page 5 of 22
DSP-22-1_MAN_D
Functional Data
Sensitivity:
Four sensitivities for are user selectable.
S1 DIP Switch
Sensitivity
1
2
OFF
OFF
.32
% ΔL/L
Low
OFF
ON
.16
% ΔL/L Medium
Low
ON
OFF
.08
% ΔL/L Medium
High
ON
ON
.04
% ΔL/L
High
Frequency Settings:
There are four frequency settings available. The actual loop frequency is
dependent on loop circuit inductance.
S3 DIP Switch
Frequency
1
2
OFF
OFF
High
ON
OFF
Medium High
OFF
ON
Medium Low
ON
ON
Low
Pulse Output:
250ms ±15ms.
Response Time:
152 ms typical. 280 ms worst case.
Vehicle Hold Time:
The detector will use an extended presence mode of operation. This mode allows
very weak detections to be held for about 15 minutes. Strong detections can be
held for very long periods of time (days or even weeks) as long as power is not
interrupted.
Electrical Data
Loop Inductance:
20 microhenries to 1500 microhenries (including lead-in inductance). Not all
frequency settings are available at inductances below 30 microhenries.
Operating Voltage:
14 volts to 27 volts DC
Solid State Output Rating:
Maximum Output Current: 250 milliamps
Maximum Pull-Up Voltage: 30 volts
Maximum Voltage Drop Across Active Output: 0.3 volts
Current Draw:
No Detect
0.69 milliamps typical @ 20VDC.
In Detect
26.43 milliamps typical @ 20VDC.
Environmental Data
Operating Temperature:
-35°F to 165°F (-37°C to 74°C)
Storage Temperature:
-40°F to 176°F (-40°C to 80°C)
Humidity:
Up to 95% relative humidity non-condensing
