800-964-0711 /   sales@lis.us
np3 3333

NP3 Three Channel – Plug-In/Terminal Block Vehicle Detector

The NP3 has been specifically designed and engineered for use in the Parking/Access Control industries and is designed for use where open, safety and exit loops are used. With standard operations including compatibility with all radio controls and more, the NP3 covers your low power, plug-in detection needs.

Product Description

Model NP3 Features:
• 3 selectable Sensitivities per channel
• 4 selectable Frequencies per channel
• Single Output
• Wrong voltage protection
• Separate Power/Fault and Detect Indicators
• Automatic Sensitivity Boost
• Power Supply requirement 10 to 30 Volts AC or DC, 5mA nominal
• Loop Scanning PREVENTS cross talk
• Removable terminal strips for direct plug-in

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The NP3 has been specifically designed and engineered for use in the Parking/Access Control industries and is designed for use where open, safety and exit loops are used. With standard operations including compatibility with all radio controls and more, the NP3 covers your low power, plug-in detection needs.
The NP3’s wide inductance range allows for use with small loops sometimes found in the Parking/Access Control industries (for recommended loop sizes please consult the LIS, Inc sales team).

Separate indicators for power/fault and detect output provide for quick visual verification of proper operation. Loop diagnostics are easily viewed with the front panel power/fault indicator.
Reliable operation and long field life are key engineering goals in every Northstar product.

Front Panel Selections:
Sensitivity – controlled by board mounted DIP switch.
• S1+S0 = Low sensitivity
• S2+S0 = Medium sensitivity
• S1+S2 = High sensitivity
• S0S0 = Channel OFF
Medium sensitivity is used for most applications; this is a
setting of S2S0. Always use the lowest sensitivity setting
that detects the desired vehicles.

Frequency – four separate settings controlled by board mounted DIP switches.
• F0+F0 = Low
• F1+F0 = Medium Low
• F0+F2 = Medium High
• F1+F2 = High

Reset – board mounted reset performs a hard reset of all
three channels. For resetting an individual channel change
the sensitivity of that channel.

Presence –60 minute.
Outputs:
Detect Output is fail secure, loss of power does not cause a detect output to be placed.
Factory Settings:
• Set to High frequency
• Set to Medium sensitivity (S2S0)
Specifications:
Output Rating: Solid State Detect 30mA Maximum current sink.
Outputs are protected from over voltage or polarity reversal.
Power: 10 to 30 volts AC or DC
Inductance Range: 20uH to 1500uH.
Temperature Range: -30 F to +180 F.
Lead-In Length: up to 2500 ft. with proper lead-in and loop.
Mechanical: 1.0” H x 3.0”D x 4.0”W.
Indicators – front panel indicators:
Power- Blue, solid with correct power supplied.
Fault- Yellow solid during a fault condition. The channel detect LED will flash during a current fault:
Single flash and pause = Open Circuit Loop,
Double flash and pause = Shorted Loop.
Detect – Red, solid during detect.
Sensitivity Boost – automatic during detect except in the
highest sensitivity setting (S1S2).

Specifications are subject to change without notice.
L NPV3L-Rev B

Connectors: – 5 Pin Terminal Block

Pin #         Function
1               Power – 10 to 30 V AC/DC
2              Power common
3              Open
4              Center
5              Re-Open

6 Pin Terminal Block

Pin #       Function
1               Loop Open
2              Loop Open
3              Loop Center
4              Loop Center
5              Loop Re-Open
6              Loop Re-Open

Model NP3