6167 Clark Center Ave
Sarasota, Florida 34238
Internet: www.northstarcontrols.com
Fax: (941) 926-2461 Tel: (941) 926-2454
Single Channel – Dual Output Plug-In Vehicle
Detector
Model NP2-C (71-416-XNH)
Features:
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8 selectable Sensitivities
4 selectable Frequencies
Wrong voltage protection
Separate Power/Fault and Detect Indicators
Automatic Sensitivity Boost
Power Supply requirement 24VAC or 120VAC,
1VA
The NP2-C has been specifically designed and engineered for use in the
Parking/Access Control industries. With standard operations including compatibility with
all radio controls and more, the NP2-C covers your plug-in detection needs.
The NP2-C’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
Northstar Loop Information Guide).
A single Bi-Color LED will show power/fault and detect to provide for quick visual
verification of proper operation.
Reliable operation and long field life are key engineering goals in every Northstar
product.
NP2-C Specifications
Front Panel Selections:
Specifications:
Sensitivity – controlled by 8 position rotary switch.
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0 = Low sensitivity (Least sensitive)
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4 = Medium
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7 = High (Most sensitive)
Medium sensitivity is used for most applications; this is a
setting of 3 or 4. Always use the lowest sensitivity setting
that detects the desired vehicles.
Output Rating: 5A, 277VAC, 24VDC Outputs are protected from
over-voltage or polarity reversal.
Frequency – four separate settings controlled by 2 board
mounted DIP switches.
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2+1 = High
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2+0 = Medium High
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1+0 = Medium Low
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0+0 = Low
Supply Voltage – incorrect voltage supplied to the unit will
not result in damage, the unit will simply not operate until
correct voltage is supplied. No fuses need to be reset.
7NH = 24V DC
3NH = 120V AC
Inductance Range: 20uH to 1500uH.
Temperature Range: -30 F to +180 F.
Lead-In Length: up to 1000 ft. with proper lead-in and loop.
Reset – changing the sensitivity setting will reset detector.
Mechanical: 4.5” L x 3.250” W x 1.0” H.
Switch Settings:
Indicators – front panel Bi-Color indicator:
Power– Green, solid with correct power supplied.
Switches 1 & 2 – Provide 4 frequency settings
Detect – Red, solid during current detect.
Switches 3 & 4 – Provide 4 mode settings: OFF/OFF
=pulse-on-entry, ON/OFF = pulse-on-leaving, OFF/ON =
presence, ON/ON = fault
Fast Blinking Red during a current fault condition. Slow blinking red
indicates a previous fault. This will continue
until detector is reset.
Switches 5 & 6 – Provide for 4 different Presence lengths.
OFF/OFF = 8 minutes, ON/OFF = 16 minutes, OFF/ON = 60
minutes, ON/ON = Permanent
Sensitivity Boost – automatic during detect except in the
highest sensitivity setting (3).
Switch 7– Not used
NP2-C Pin Connections
Switch 8 – Provides for Fail-safe or Fail-secure operation:
OFF = Fail-safe, ON = Fail-secure (for power only).
Outputs:
Most applications require using the fail-safe relay #1
providing presence (detector stays in detect as long as
vehicle is present over the loop up to the presence time
limit). Relay #1 Normally Open connections are : Pins 4 & 5,
the Green (common) and Violet (N.O.) wires from the wiring
harness.
For a second output (pulse or presence) relay #2 is used.
Commonly the #2 (Orange, N.O.) and #1 (Blue, common)
are used, this will provide a Fail-secure for power output.
When using relay #2 select the proper DIP switch settings for
your application.
Detect Output in fail secure: loss of power does not cause a
detect output to be placed upon power-up.
Pin #
1
2
3
4
5
6
7
8
9
10
Function
Relay 2 Com
Relay 2 N.O.
Relay 2 N.C.
Relay 1 Com
Relay 1 N.O.
Relay 1 N.C.
Supply + (Live)
Supply – (Neutral)
Loop
Loop
Note: The above connections are shown with correct power
supplied and no vehicle present in Failsafe mode, for Fail Secure
Mode the Relay 1 NC and NO are reversed.
Northstar Controls L.L.C. warrants this product against defects in
Manufacturing and workmanship for one year from date of shipment
from the Northstar Controls L.L.C. factory.
Specifications are subject to change without notice.
L NP2C-Rev C