• Very low power. Typically draws less than 700 microamps.
• Advanced technology with superior noise tolerance.
• Selectable Presence or Pulse operation.
• 4 selectable sensitivity settings and sensitivity boost allow for a wide range of uses.
• Loop monitoring provides a fault display when a loop failure is detected.
• Fault memory gives a unique display when a fault has occurred, but the system is currently functioning properly.
• Supports the Free exit probe and provides unique flicker display for detection during pulse operation.

Loop Inductance: 20μH to 1500μH (including lead-in inductance)

Operating Temperature: -35°F to 165°F (-37°C to 74°C)

Operating Voltage: 14 volts to 27 volts DC

DSP-22-1

Operating Current:
No Detect 0.69 milliamps typical @ 20VDC.
In Detect 26.43 milliamps typical @ 20VDC.

Response Time: 152 ms typical. 280 ms worst case.

Output Rating: 250 milliamps at 30 volts maximum

Pulse Output: 250ms ±15ms on period followed by a 250ms off period
before the next pulse can begin

Green Power LED: The green power LED will be on whenever the detector is operating in the full power mode. Full power mode occurs whenever a possible vehicle has been detected, any channel is in detect, or any loop has failed. When the detector is operating normally without a loop failure and no vehicle detected, the LED will blink on once every two seconds to indicate that it is operating in the low power mode.

Red Detect LED: The red LED will indicate the status of the detector. Occupancy, Pulse outputs, Loop Failures, and Past Failures are all displayed on this LED.

Indicator Test: All three LEDs will turn on and then off momentarily as a lamp test each time the unit is reset.

DSP-22S-1 Manual

DSP-22S-1 Cut Sheet

DSP-22S-1 Size Chart