Rae P-1400 User manual

This manual contains technical information for the
P-1400 Loop Detector
pn 889-1600-04 Revision: April 2020
P-1400
Loop Detector
Firmware Version 4.02
Operations Manual
Four Channel Menu Drive Programmable Inductive Loop Vehicle
Detector Designed for Railroad Applications
Four Loop Inputs, Two Vital Outputs, and One Vital Input
Built-in Loop Analyzer for Each Channel

THE FOLLOWING PRODUCT WAS DESIGNED, INSPECTED, TESTED AND
MANUFACTURED IN THE USA BY EBERLE DESIGN, INC. IN PHOENIX, ARIZONA.
INFORMATION CONTAINED HEREIN IS PROPRIETARY TECHNICAL INFORMATION OF
EBERLE DESIGN, INC. PUBLICATION, REPRODUCTION OR USE IN WHOLE OR PART IS
NOT PERMITTED EXCEPT UNDER TERMS AGREED UPON IN WRITING. ALL
REGISTERED TRADEMARKS OF EBERLE DESIGN INC. ARE UNDER
© COPYRIGHT
MAINTENANCE NOTE
IT IS AN EBERLE DESIGN, INC. RECOMMENDATION THAT EACH UNIT BE TESTED
AT LEAST ANNUALLY TO ENSURE COMPLIANCE WITH FACTORY
SPECIFICATIONS AND MEETS PROPER OPERATIONAL STANDARDS. THE
RESULTS OF THIS TESTING WILL BE DOCUMENTED.

Model P-1400 Operations Manual
Table of Contents
Section 1 General Description................................................................................................................................1
Section 2 General Characteristics..........................................................................................................................2
2.1 Loop Frequency..........................................................................................................................................2
2.2 Sensitivity...................................................................................................................................................2
2.3 Option 1: Loop Inductance Display.............................................................................................................2
2.4 Option 2: Loop Inductance -∆L/L Display ..................................................................................................2
2.5 Option 3: Noise Filter .................................................................................................................................2
2.6 Option 4: Detection Zone Tracking.............................................................................................................3
2.7 Option 5: Sensitivity Boost .........................................................................................................................3
2.8 Option 6: Audible Detect Signal .................................................................................................................3
2.9 Loop Check.................................................................................................................................................4
2.10 Detector ID ...............................................................................................................................................4
2.11 Option 7: Synch Feature............................................................................................................................4
2.12 Option 10: Inverted Vital Output...............................................................................................................4
2.13 Primary Vital Output Delay ......................................................................................................................4
2.14 Primary Vital Output Extension ................................................................................................................4
2.15 Input / Output Mapping.............................................................................................................................4
2.16 Full Restore to Factory Default Settings....................................................................................................5
2.17 Diagnostic Features Activation .................................................................................................................5
2.18 Password Protection..................................................................................................................................5
Section 3 Specifications...........................................................................................................................................6
3.1 Physical 6
3.2 Electrical.....................................................................................................................................................6
3.3 Operational .................................................................................................................................................6
3.4 Table: Sensitivity, -∆L/L, and Response Time ............................................................................................9
3.5 Table: Default Settings................................................................................................................................9
3.6 Table: Terminal Assignments (Labeled on P-1400 Motherboard).............................................................10
3.7 Table: Pin Assignments (DB-9 Communication Interface Connector) ......................................................10
Section 4 User Interface........................................................................................................................................11
Section 5 Installation and Set-Up.........................................................................................................................12
5.1 Initial Installation Start-up Mode Display Screens ....................................................................................14
5.2 Program Mode Display Screens ................................................................................................................15
5.2.1 Primary Vital Output Mapping Screens..........................................................................................19
5.2.2 Auxiliary Vital Output Mapping Screens .......................................................................................20
5.3 Normal Mode Display Screens..................................................................................................................23
5.4 Error Message Display Screens.................................................................................................................24
5.5 Loop Check Pass / Fail Indications ...........................................................................................................25
5.6 Vital Input (VITAL IN) Status / Fail Indications.......................................................................................26
5.7 Primary Vital Output (VITAL OUT) Status / Fail Indications...................................................................26
5.8 Auxiliary Vital Output (VITAL AUX) Status / Fail Indications................................................................26
5.9 Synch Fail Indications...............................................................................................................................26
5.9.1 Series Synch Fail Indications .........................................................................................................26
5.9.2 Parallel Synch Fail Indications.......................................................................................................27
5.10 Loop Fail Indications ..............................................................................................................................27
5.11 Setting Sensitivity Using the Bargraph....................................................................................................27
5.12 Full Restore To Factory Default Settings ................................................................................................28
5.13 Diagnostic Features Activation ...............................................................................................................28
5.14 Display Test............................................................................................................................................28
5.15 Changing Processor Board or Motherboard.............................................................................................28
Section 6 Block Diagram ......................................................................................................................................30
Section 7 Theory of Operation.............................................................................................................................31
Section 8 Maintenance and Troubleshooting ......................................................................................................32
8.1 Basic Troubleshooting Tips ......................................................................................................................32
8.2 Things to Know About Loops...................................................................................................................33

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Section 1 General Description
This product manual was written for people installing, operating, and maintaining the Reno A&E Model P-1400
inductive loop vehicle detector. The Model P-1400 is a four-channel inductive loop vehicle detector designed as a
direct, drop-in replacement for older technology detectors that mount in ground level enclosures. It is designed to
be used in applications requiring detection of railway vehicles in large detection areas typically required in
classification yard switch and sideswipe protection, interlocking and moveable bridge occupancy detection, or
detection of roadway vehicles and/or railway vehicles in at-grade crossing sites.
The Model P-1400 monitors and processes signals from four loop / lead-in circuits, four check loop circuits, and
one Vital input. These inputs can be programmed to control two Vital outputs, one primary Vital output and one
auxiliary Vital output. The primary Vital output can be controlled by any combination of the four loop inputs
and/or the Vital input. In addition to the four loop inputs and the Vital input (as described above), the auxiliary
Vital output can be controlled by the four loop Health Status inputs that are continuously monitored by the
processor. A loop failure will deactivate the Vital output that the loop status input and/or loop Health Status input
is programmed to control. The check loop circuits can be programmed to simulate a vehicle detection (every 1 to
255 minutes) in the loop area as a means of verifying proper loop operation. The Vital outputs and Vital input are
monitored to ensure they are in the correct state. If the state of the Vital input is not correct, the front panel LED
indicator will turn red and all Vital outputs will be deactivated. If the state of either Vital output is not correct, the
front panel LED corresponding to that output will turn red and both Vital outputs will be deactivated.
A Liquid Crystal Display (LCD), seven LEDs, and four front panel pushbuttons are used to display and program all
detector functions. The Model P-1400 also incorporates a series of motherboard and front panel mounted
connectors to facilitate set-up and operation. Motherboard mounted Wago type connectors are used for detector
input and output connections. A front panel mounted nine pin RS-232 connector is used for communication with a
laptop computer.
The use of a LCD is one feature that distinguishes this detector from that of other manufacturers. It allows for
more information, never before available, to be displayed to the user during normal operation of the detector.
Several diagnostic modes are available to aid the technician in troubleshooting detection problems. It also allows
easy viewing and setting of all programmable values in the detector. The detector continues to operate normally
while being programmed. An eight-segment bargraph at the top of the LCD provides a graphical representation of
the relative change of inductance as seen by the detector. This automatically takes into account loop size, loop
inductance, number of loops, number of turns, geometry, lead-in length, etc. The first bargraph segment represents
the minimum inductance change necessary for the detector to output a call. Larger inductance changes will be
indicated by more segments. Each additional segment represents the next sensitivity level exceeded. Therefore,
the bargraph indicates if the sensitivity is set too high or too low, easily facilitating the ideal setting of sensitivity
level.
All programmed settings are stored in non-volatile memory and can only be changed by programming new
settings. Memory storage consists of an internal EEPROM mounted on the processor board and an EEPROM
mounted on the motherboard. Settings programmed on either component must match those programmed on the
other for the detector to operate. Loss of power or a detector reset will not change the programmed settings. If a
loop failure occurs, the LCD will display the type of loop failure as L lo (for -25% change or shorted loop
conditions) or L hi (for +25% change or open loop conditions). Each loop failure is counted (up to a maximum of
255 failures) and accumulated in the Loop Failure Memory. Information on the number of failures since the last
detector reset or power interruption is very useful during analysis of problems due to intermittent loop operation.
The Model P-1400 detector is a scanning detector. The scanning operation sequentially activates the on and off
cycle of each detector channel’s oscillator. Because only one channel’s loop input(s) is (are) active at a given time,
crosstalk between adjacent loops connected to the same scanning detector is minimized. Several Model P-1400
detectors can be linked together via the Synch In and Synch Out lines. This allows loops connected to different
detectors to be scanned in series or parallel. When in Program Mode, the Model P-1400 detector displays the real
time loop frequency reading for each channel. The eight frequency levels can be incremented or decremented to
provide precise frequency settings. This removes the guesswork when changing frequency settings to eliminate
crosstalk. NOTE: Adjacent loops connected to different channels of a non-scanning detector or different scanning
detectors should be set to different frequencies with the maximum separation possible.
The Reno A&E Model P-1400 utilizes the first major innovation in inductive loop detectors since the introduction
of digital detectors. The programming of all of the detector’s parameters with four normally open pushbutton
switches not only simplifies setup by removing binary coded rotary or DIP switches, but also increases the
reliability of the detector by removing the dependence on switch contacts during normal operation. The detailed
descriptions displayed on the LCD facilitate the interpretation of operational state conditions to determine the
detector status.

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Section 2 General Characteristics
2.1 LOOP FREQUENCY
There are eight selectable loop frequency settings (normally in the range of 20 to 100 kilohertz) per loop input.
The actual loop operating frequency is a function of the loop / lead-in network and the components of the loop
oscillator circuit. The digital display of the actual loop operating frequency for each setting makes it easy to
quickly identify and eliminate crosstalk in the most difficult to configure installations. The frequency display is
typically very stable when the loop is vacant and vehicles are not passing close to the loops. If the reading is
varying by more than ±1 in the last digit, this is an indication of possible crosstalk between loops.
2.2 SENSITIVITY
There are ten selectable sensitivity levels per loop input, plus Continuous-Call and Loop-Off. The sensitivity
levels are designed so that a one level increase actually doubles the sensitivity and a one level decrease halves the
sensitivity. A unique bargraph displayed on the LCD makes it easy to quickly set sensitivity at the ideal level for
any loop / lead-in network situation. (See Section 3.4 for actual detection levels at each sensitivity level.)
CONTINUOUS-CALL: When set to the Continuous-Call state, the Loop Status is continuously in the Call state
regardless of the presence or absence of vehicles over the loop. If the Loop Status Input is assigned to a Vital
Output, the Continuous-Call state will deactivate the Vital Output. The loop oscillator is disabled when in the
Continuous-Call State. This state is indicated by Call flashing on the LCD. This option can be selected from
the Sensitivity menu in Program Mode and is useful for checking controller response and other troubleshooting
activities.
LOOP-OFF: When set to the Loop-Off state, the Loop Status is continuously in the No-Call state regardless of
the presence or absence of vehicles over the loop. If the Loop Status Input is assigned to a Vital Output, the
Loop-Off state will not affect the Vital Output. The loop oscillator is disabled when in the Loop-Off State. This
state is indicated by OFF flashing on the LCD. This option can be selected from the Sensitivity menu in
Program Mode and is useful for checking controller response and other troubleshooting activities.
2.3 OPTION 1: LOOP INDUCTANCE DISPLAY
The Loop Inductance Display setting can be toggled ON or OFF by momentarily pressing either the (UP) or 
(DOWN) pushbutton. When this option is enabled (ON), the LCD displays the total loop inductance (actual loop
inductance plus actual lead-in inductance) in microhenries for loop inductance values in the range of 20 to 2500
microhenries. By recording the inductance of the loop / lead-in circuit when it is first installed, the actual
inductance can be compared to the expected inductance to help identify defective loop / lead-in circuits. Loop /
lead-in inductance can be easily estimated using the simple formulas included in Section 8.2 of this manual.
NOTE: Enabling this option activates it for all loop inputs. This option is automatically disabled 15 minutes after
activation or on loss of power.
2.4 OPTION 2: LOOP INDUCTANCE -∆L/L DISPLAY
The Loop Inductance -ΔL/L Display setting can be toggled ON or OFF by momentarily pressing either the 
(UP) or (DOWN) pushbutton. When this option is enabled (ON), the LCD displays the percentage of
inductance change (-ΔL/L value) during the Call state. To facilitate the viewing of the maximum amount of
change in the -ΔL/L value while traffic is in motion over the detection zone, the channel holds the peak -ΔL/L
value for a period of two seconds. NOTE: Enabling this option activates it for all loop inputs. This option is
automatically disabled 15 minutes after activation or on loss of power.
2.5 OPTION 3: NOISE FILTER
Each loop input’s Option 3 has four settings ranging from 3.00 to 3.03. When Option 3 is set to 3.00, the option is
disabled (OFF), and normal noise filtering is used. When Option 3 is set to 3.01, 3.02, or 3.03 the option is ON,
and increased filtering of the loop signal is used to eliminate problems associated with particular types of noise.
Turning this option ON when not required can degrade the performance of the detector. The default setting of this
option is 3.00 (OFF). This option should only be turned ON at the advice of Reno A&E. NOTE: Each loop can
be enabled independently.
3.00 = 250 milliseconds filter.
3.01 = 1 second filter.
3.02 = 2 seconds filter.
3.03 = 10 seconds filter.

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2.6 OPTION 4: DETECTION ZONE TRACKING
Each loop input’s Option 4 has nine settings ranging from 4.00 to 4.08. This option allows the user
to select a detection zone tracking setting that will maintain detection zone occupancy for an
extended period of time. When Option 4 is set to 4.00, the detector will track out the vehicle (i.e.
drop the detection of the vehicle) in four minutes to several hours depending on the amount of
inductance change (-ΔL/L) caused by the vehicle when it is detected. The greater the change caused
by the vehicle, the longer the time needed to track out the vehicle. When Option 4 is set to 4.01,
4.02, 4.03, 4.04, 4.05, 4.06, 4.07, or 4.08 the option is ON, and the detector will provide extended
detection times.
There are many factors that influence the proper setting of this option. A full explanation of how to
determine the correct setting is beyond the scope of this manual. Contact a Technical Support
representative at Reno A&E regarding proper setting of this option.
NOTE: Using this option in a long loop application is not recommended. The detector will drop the
call prior to the vehicle totally exiting the loop.
4.00 = Tracking Rate 0.
4.01 = Tracking Rate 1.
4.02 = Tracking Rate 2.
4.03 = Tracking Rate 3.
4.04 = Tracking Rate 4.
4.05 = Tracking Rate 5.
4.06 = Tracking Rate 6.
4.07 = Tracking Rate 7.
4.08 = Tracking Rate 8.
2.7 OPTION 5: SENSITIVITY BOOST
Each loop input’s Option 5 has five settings ranging from 5.00 to 5.04. When Option 5 is set to 5.00, the option is
disabled (OFF), and no sensitivity boost is added. When Option 5 is set to 5.01, 5.02, 5.03, or 5.04 the option is
ON, and sensitivity boost is enabled. After detection, the sensitivity is boosted to the currently selected sensitivity
level plus the number of level(s) selected. The maximum sensitivity level that can be obtained with or without
sensitivity boost is level 10.
5.00 = Off (no sensitivity boost).
5.01 = 1 level of sensitivity boost.
5.02 = 2 levels of sensitivity boost.
5.03 = 3 levels of sensitivity boost.
5.04 = 4 levels of sensitivity boost.
2.8 OPTION 6: AUDIBLE DETECT SIGNAL
Each loop input’s Audible Detect Signal setting can be toggled ON or OFF by momentarily pressing either the 
(UP) or (DOWN) pushbutton. Only one loop input can be turned ON at a time. Turning this option ON for one
loop input automatically turns it OFF for the other loop inputs. When this option is enabled (ON), an audible
signal will be activated whenever the detection zone for the selected loop input is occupied. The audible signal
indicates actual occupancy of the loop detection zone. This feature allows a technician to watch the detection zone
and confirm correct detector operation without having to look at the detector display as well. NOTE: This option
is automatically disabled 15 minutes after activation or on loss of power.

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2.9 LOOP CHECK
The Loop Check feature provides a means of automatically verifying the proper operation of each loop circuit.
The Loop Check Timer can be set for an interval ranging from 0 to 255 minutes in one-minute increments. A
setting of 000 indicates that the Loop Check feature is off.
2.10 DETECTOR ID
This feature is used in conjunction with the Synch feature (Option 7) and is also used as a means of providing each
detector with a unique identification signature for communication purposes. Detector ID settings can range from
000 to 255. If, however, the detector is set to an ID value of 255, it is considered to be in an uninitialized state and
the detector will not save any power down data. When a detector with an ID setting of 255 is powered up, the
LCD will alternate between id and 255 until the ID setting is changed to something other than 255 and the new
setting is saved in detector memory. When any detector is first initialized, its ID setting is, by default, 255.
2.11 OPTION 7: SYNCH FEATURE
This option provides a means of linking together up to four (4) P-1400 detectors. Each detector’s Option 7 has
three settings ranging from 7.00 to 7.02. There are two modes of Synch, Series Synch and Parallel Synch. When
set to operate in Series Synch mode, one detector channel in the entire detector system is active at any given time.
This has the advantage of minimizing crosstalk between adjacent loops connected to different P-1400 detectors.
When set to operate in Parallel Synch mode, all detectors scan their respective channel 1, 2, 3, or 4 inputs at the
same time. Parallel Synch offers a faster response time than Series Synch, however the potential for crosstalk is
greater.
7.00 = Off.
7.01 = Series Synch.
7.02 = Parallel Synch.
NOTE: When operating in either Series or Parallel Synch mode, all linked detectors must have Option 7 set to the
same setting.
2.12 OPTION 10: INVERTED VITAL OUTPUT
The detector’s Inverted Vital Output option can be toggled ON or OFF by momentarily pressing either the (UP)
or (DOWN) pushbutton. When Option 10 is enabled (ON), the Auxiliary Vital Output will assume the state
opposite to that of the Primary Vital Output. When the Primary Vital Output deactivates, the Auxiliary Vital
Output will activate. When the Primary Vital Output activates, the Auxiliary Vital Output will deactivate.
Loop failures or loop check test failures will deactivate the Primary Vital Output and activate the Auxiliary Vital
Output. If either Vital Output fails its self-check, both of the detector’s Vital Outputs will be deactivated and
remain deactivated until the problem is corrected and the detector is reset regardless of the setting of Option 10.
2.13 PRIMARY VITAL OUTPUT DELAY
The Primary Vital Output can be conditioned with a Delay time that is adjustable from 0.0 to 25.5 seconds in 0.1-
second steps. Primary Vital Output Delay time starts counting down when a Call state is received from the Loop
Status Input or Vital Input that is mapped to the Primary Vital Output. When the timer reaches zero, the Primary
Vital Output is deactivated. Primary Vital Output Delay does not condition the Auxiliary Vital Output.
2.14 PRIMARY VITAL OUTPUT EXTENSION
The Primary Vital Output can be conditioned with an Extension time that is adjustable from 0.0 to 25.5 seconds in
0.1-second steps. Primary Vital Output Extension time starts counting down when a Call state is cleared from the
Loop Status Input or Vital Input that is mapped to the Primary Vital Output. The Primary Vital Output will remain
off until the Extension time reaches zero. Any vehicle entering the loop detection zone during the Extension time
period causes the Primary Vital Output to remain in the off state, and later, when the last vehicle clears the loop
detection zone, the full Primary Vital Output Extension time starts counting down again. Primary Vital Output
Extension does not condition the Auxiliary Vital Output.
2.15 INPUT / OUTPUT MAPPING
The Loop Status Inputs and/or Vital Input can be assigned to either or both of the Primary Vital and Auxiliary Vital
Outputs. Health Status can only be mapped to the Auxiliary Vital Output.

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2.16 FULL RESTORE TO FACTORY DEFAULT SETTINGS
Pressing all four front panel pushbutton switches simultaneously and continuously for five (5) seconds restores all
factory default settings. The countdown of the five second period is displayed on the LCD. Releasing any or all of
the switches before the countdown ends aborts the full restore operation. (See Section 3.5 for default settings).
Refer to Section 5.0 for details. Caution: Restoring the factory default settings will clear all previously
programmed settings including any mapped output(s).
2.17 DIAGNOSTIC FEATURES ACTIVATION
When the detector is operating in normal mode, pressing either the (UP) or (DOWN) pushbutton will
temporarily activate Option 1 (Loop Inductance Display) and Option 2 (Loop Inductance -ΔL/L Display) for all
loop inputs and Option 6 (Audible Detect Signal) for the loop input indicated in the lower portion of the LCD. All
three of these diagnostic options will remain active for 15 minutes.
2.18 PASSWORD PROTECTION
This detector has a password protection feature to guard against the accidental change of detector settings. In order
to change any detector setting, a valid password must be entered to disable the password protection feature. Refer
to Section 5.0 for details.

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Section 3 Specifications
3.1 PHYSICAL
WEIGHT: 2.54 lb (40.6 oz) (2.09 kg).
SIZE: The motherboard is 11 inches (27.94 cm) long x 7.5 inches (19.05 cm) wide. The detector electronics
housing is mounted to the motherboard and is 6.5 inches (16.51 cm) long x 2.5 inches (6.35 cm) wide x 5 inches
(12.7 cm) deep (depth to the motherboard).
OPERATING TEMPERATURE: -40°F to +180°F (-40°C to +82°C).
CIRCUIT BOARD: Processor, power supply, LED, and LCD printed circuit boards are 0.062 inch thick FR4 material
with 2 oz. copper on both sides and plated through holes. Motherboard is 0.125 inch thick FR4 material with 2 oz.
copper on both sides and plated through holes.
INTERFACE CONNECTOR: (Communications, COMM PORT) DB-9, nine pin, right angle, PC Board mount, metal
shell, D subminiature receptacle with gold plated female contacts and nuts for retaining screws.
MOTHERBOARD TERMINALS: Wago cage clamp type 745-831 (gray) and 745-834 (blue).
3.2 ELECTRICAL
POWER: 9.5 to 18 VDC, 1.0 Amp maximum.
FUSE:3 amp, ATO / ATC (automotive) type located in a fuse holder mounted on the motherboard.
POWER DOWN: When the DC voltage drops below the low power detection threshold (7.8 VDC), the detector will
save all needed information to hold calls through the power down sequence. Upon power restoration (a minimum
of 9.0 VDC), the detector will use this saved data to determine the correct occupancy state of all loops.
LOOP FEEDER LENGTH: Up to 1500 feet (450 m) maximum with proper feeder cable and appropriate loops.
LOOP INDUCTANCE RANGE: 20 to 2500 microHenries with a Q factor of 5 or greater.
LOOP INPUTS: Transformer isolated. The minimum capacitance added by the detector is 0.068 microFarad.
LIGHTNING PROTECTION: The detector can tolerate, without damage, a 10 microFarad capacitor charged to 2,000
volts being discharged directly into the loop input terminals.
RESET: Application of a 30 millisecond low state (relative to input +12 VDC) to the Reset terminal on the
motherboard resets all loops. Each loop can be manually reset by selecting the loop input then pressing and
holding the front panel CHAN pushbutton for three seconds, or by changing the sensitivity or loop frequency of
the loop input.
SYNCHRONIZE SCAN CONTROL:The SYNCH IN input and SYNCH OUT output allow the loops from different
detectors to be scanned sequentially, either in series or parallel. This feature can be used to eliminate crosstalk
between adjacent loops connected to different P-1400 detectors. NOTE: Response times will vary depending on
the number of detectors (up to a maximum of four) on the Synch Line. (See Section 3.4.)
VITAL OUTPUTS:The Primary and Auxiliary Vital Outputs are transformer isolated and are capable of sourcing 200
mA at 12 VDC. Opto-isolated circuitry verifies that the Vital Output is in the desired state. If either Vital Output
fails its self-check, both of the detector’s Vital Outputs will be deactivated.
VITAL INPUTS:12 volt input isolated from the detector. Opto-isolated circuitry verifies that the Vital Inputs are
operational.
CHECK LOOP RELAYS:Contacts rated for 6.0 Amps maximum, 150 VDC, 300 VAC, and 500 VA maximum
switched power.
3.3 OPERATIONAL
LOOP STATUS INDICATORS: Each loop input has a super high intensity red light emitting diode (LED) to indicate a
Call (vehicle detected over loop) or failed loop.
INPUT /OUTPUT INDICATORS: The detector has three dual color (green / red) LEDs to indicate the following:
VITAL IN LED StatusMeaning
OFF Vital Input is deactivated (low voltage level).
ON (GREEN) Vital Input is activated (high voltage level).

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ON (RED) Vital Input has failed its self-check (Vital Input, Primary Vital
Output, and Auxiliary Vital Output revert to OFF state).
VITAL OUT LED Status Meaning
OFF Primary Vital Output is deactivated (low voltage level).
ON (GREEN) Primary Vital Output is activated (high voltage level).
2Hz FLASHING (GREEN) Timing Delay activated and Primary Vital Output is working
(high voltage level until delay times out).
5Hz FLASHING (GREEN) Timing Extension activated and Primary Vital Output is
working (low voltage level until extension times out).
ON (RED) Primary Vital Output has failed its self-check (Vital Input,
Primary Vital Output, and Auxiliary Vital Output revert to OFF
state).
VITAL AUX LED Status Meaning
OFF Auxiliary Vital Output is deactivated (low voltage level).
ON (GREEN) Auxiliary Vital Output is activated (high voltage level).
ON (RED) Auxiliary Vital Output has failed its self-check (Vital Input,
Primary Vital Output, and Auxiliary Vital Output revert to OFF
state).
RESPONSE TIME: See Section 3.4 for response times.
SELF-TUNING: Each loop circuit tunes and is operational within two seconds after application of power or after
being reset. Full sensitivity and hold time require 30 seconds of operation.
ENVIRONMENTAL &TRACKING: The detector is fully self-compensating for environmental changes and loop drift
over the full temperature range and the entire loop inductance range.
GROUNDED LOOP OPERATION: The loop isolation transformer allows operation with poor quality loops (which may
include one short to ground at a single point).
LOOP (FAIL)MONITOR: If the total inductance of a channel’s loop input network goes out of the range specified for
the detector, or rapidly changes by more than ±25%, and the Loop and/or Health Status outputs are mapped, the
Loop and/or Health Status outputs will immediately enter Fail-Safe mode and the LCD will display LOOP FAIL.
The type of loop failure will also be displayed as L lo (for -25% change or shorted loop conditions) or L hi (for
+25% change or open loop conditions). This will continue as long as the loop fault exists. At the time of a loop
failure, the Loop status LED will begin to flash at a rate of three flashes per second. The LED will continue this
display pattern until the loop input channel is manually reset or power is removed. If the loop self-heals, the
LOOP FAIL message on the LCD will extinguish and the loop input channel will resume operation in a normal
manner; except the Loop status LED will continue the three flashes per second display pattern, thus providing an
alert that a prior Loop Fail condition has occurred. Each loop failure for the loop input channel is counted and
accumulated into the Loop Fail Memory. The total number of loop failures written into the Loop Fail Memory
(since the last power interruption or manual reset) can be seen by stepping through the loop input channel’s
detector functions in Program Mode to the LOOP FAIL message. When the status of one or more loops is
assigned to a Vital Output, a loop failure will deactivate the Vital Output and the corresponding VITAL OUT
LED will turn from green to OFF to indicate the failure. When a Health Status is assigned to the Auxiliary Vital
Output, a loop failure will deactivate the Auxiliary Vital Output and the VITAL AUX LED will turn off.
LOOP CHECK:This feature is used as a means of verifying proper operation of each inductive loop connected to a
detector. In a typical installation, a separate loop of wire called a check loop will be wound around the perimeter
of each inductive loop. The Loop Check Timer can be programmed with a value ranging from 1 to 255 minutes.
Once this time interval has elapsed, the detector will automatically short the check loop simulating vehicle
detection in the inductive loop. If this initial loop check test fails, the detector will enter a verification mode to
make certain that the loop failure is indeed due to a loop related problem. While operating in this verification
mode, the detector will perform a series of ten verification tests and the LCD will flash Pcl. If the ten loop check
verification tests all fail, the Vital Output(s) to which the Loop Status Input(s) and/or Health Status Input(s) is (are)
mapped will be deactivated. The loop check test will be repeated at regular intervals depending on the value
programmed into the Loop Check Timer. The Vital Output(s) to which the Loop Status Input(s) and/or Health
Status Input(s) is (are) mapped will not be activated until the problem with the check loop is corrected and the
channel reset or until the Loop Check function is turned off. During a check loop failure the LCD will flash Lcl.
NOTE: If the Loop Check Timer is set to 0 minutes, the Loop Check function is off.
SYNCH MODE:The Synch feature provides a means of linking up to four P-1400 detectors together. There are two
modes in which the detectors can be configured to operate, Series Synch or Parallel Synch.

889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 8of 33
Series Synch mode can be used to eliminate the possibility of crosstalk between adjacent loops. Series Synch will
activate one loop at a time, cycling through all loops configured to detect in the Series Synch mode. When the
detector system is configured to operate in Series Synch mode, it is necessary for one detector to be identified as
the master unit, i.e. the detector that starts the Synch pulse. This master unit must be assigned a Detector ID value
of 000. The scanning sequence of detector loop input channels is Detector ID 000 channel 1, Detector ID 000
channel 2, Detector ID 000 channel 3, Detector ID 000 channel 4, second detector channel 1, second detector
channel 2, second detector channel 3, second detector channel 4, and so on until the synch pulse returns to the first
detector. The Synch-out of the first (master) unit is connected to the Synch-in of the second detector; the Synch-
out of the second detector is connected to the Synch-in of the third detector. This connection scheme is continued
until the Synch-out of the last detector is connected to the Synch in of the first (master) detector.
When set to operate in Parallel Synch mode, all detectors configured to operate in Parallel Synch mode start
scanning their respective channel 1 loop inputs at the same time and then proceed to sequentially scan their
respective channel 2, 3, and 4 loop inputs. When the detector system is configured to operate in Parallel Synch
mode, it is necessary for one detector to be identified as the master unit. This master unit must be assigned a
Detector ID value of 000. Connections between detectors differ from those in Series Synch mode in that the
Synch-out of first detector is connected to the Synch-in of the other detectors and the Synch-in of the first detector
is connected to the Synch-out of the other detectors.
Operation in either Synch mode requires that the Reset inputs (on the motherboard) of all detectors be tied together
and that the DC - inputs (on the motherboard) of all detectors be tied together. To start operation in either Synch
mode, the detectors must be reset using the Reset terminal on the motherboard.
When operating in Series Synch mode, if any detector fails to Synch, all of the Vital Outputs of every detector
configured to operate in Synch mode will be deactivated. If the detector that has failed to Synch has the Synch
feature turned off, the other detectors configured to operate in Synch mode will continue to operate in Series Synch
mode.
Detector
1
(ID 000)
Synch
Out
Synch
In
Detector
2
Detector
Detector
4
Synch
In
Synch
Out
Synch
In
Synch
Out
Synch
In
Synch
Out
Reset
Reset
Reset
Reset
+
-
+
-
+
-
+
-
Series Synch Connections
Detector
(ID 000)
Synch
Out
Synch
In
Detector
2
Detector
3
Detector
4
Synch
In
Synch
Out
Synch
In
Synch
Out
Synch
In
Reset
Reset
Reset
Reset
+
-
+
-
+
-
+
-
Synch
Out
Parallel Synch Connections

889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 9of 33
When operating in Parallel Synch mode, if the master unit fails, all of the Vital Outputs of every detector
configured to operate in Synch mode will be deactivated. If one or more of the detectors connected to the master
unit Fails, only those Vital Outputs of the detector(s) that has (have) failed will be deactivated.
When operating in either Series or Parallel mode, FSY will be displayed on the LCD screen of the detector(s)
associated with the failure. This display state will continue until the problem is corrected and the detectors are
powered down and repowered, reset, or until the Synch function is turned off.
In either mode of operation, the Synch feature will continue to function if one or more detectors has (have) been
disabled.
3.4 TABLE: SENSITIVITY, -∆L/L, AND RESPONSE TIME
Sensitivity -ΔL/L
Response Time (milliseconds)
One
Detector
Two Detectors
Three Detectors
Four Detectors
Series
Synch Parallel Synch Series Synch Parallel Synch Series Synch Parallel Synch
OFF
-------
-------
-------
-------
-------
-------
-------
-------
1
5.12 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
2
2.56 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
3
1.28 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
4
0.64 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
5
0.32 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
6
0.16 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
7
0.08 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
8
0.04 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
9
0.02 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
10
0.01 %
121 ±25
268 ±52
278 ±58
400 ±80
278 ±58
530 ±110
278 ±58
CALL
-------
-------
-------
-------
-------
-------
-------
-------
3.5 TABLE: DEFAULT SETTINGS
Channel & Detector Settings
Function Channel 1 Channel 2 Channel 3 Channel 4
Frequency
2
4
6
8
Sensitivity
6
6
6
6
Option 1 - Loop Inductance Display
OFF
OFF
OFF
OFF
Option 2 - Loop Inductance -ΔL/L (%) Display
OFF
OFF
OFF
OFF
Option 3 - Noise Filter
3.00
3.00
3.00
3.00
Option 4 - Detection Zone Tracking
4.02
4.02
4.02
4.02
Option 5 - Sensitivity Boost
5.00
5.00
5.00
5.00
Option 6 - Audible Detect Signal
OFF
OFF
OFF
OFF
Loop Check Feature
005
005
005
005
Detector ID Setting
255
Option 7 - Synch Feature
7.00
Option 10- Inverted Vital Output
OFF
Vital Output Settings
Function Setting
Primary Vital Output Delay Time
00.0
Primary Vital Output Extension Time
00.0
Primary Vital Output Mapping
00
Auxiliary Vital Output Mapping
000

889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 10 of 33
3.6 TABLE: TERMINAL ASSIGNMENTS (LABELED ON P-1400 MOTHERBOARD)
Label
Check Loop 1 (2 Terminals)
Loop 1 (2 Terminals)
Check Loop 2 (2 Terminals)
Loop 2 (2 Terminals)
Check Loop 3 (2 Terminals)
Loop 3 (2 Terminals)
Check Loop 4 (2 Terminals)
Loop 4 (2 Terminals)
Vital In +
Vital In -
Reset
Synch In
Synch Out
Vital Outputs Out +
Vital Outputs Out -
Vital Outputs Aux +
Vital Outputs Aux -
Power Earth
Power DC -
Power DC +
3.7 TABLE: PIN ASSIGNMENTS (DB-9 COMMUNICATION INTERFACE CONNECTOR)
Pin
Function
1
No Connection
2
RS-232 TX
3
RS-232 RX
4
No Connection
5
RS-232 Common
6
No Connection
7
No Connection
8
No Connection
9
No Connection

889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 11 of 33
Section 4 User Interface
NOTES: The LCD backlighting illuminates whenever any pushbutton is pressed. Backlighting will extinguish 15 minutes
after the last pushbutton press.
Pressing any two or three pushbuttons illuminates the LCD backlighting, displays all LCD segments, and
illuminates the VITAL IN, VITAL OUT, and VITAL AUX Output LEDs. The Output LEDs are illuminated in their
red phase as a means of confirming proper function of the detector’s Vital Output failure feature.
There are no internal switches or jumpers to set.
P-1400 SERIES
LOOP PROCESSOR
1 2 3 4
LOOPS
CHAN
FUNC
VITALS
OUT
IN
AUX
-∆L/L =
FREQ KHZ
LOOP FAIL
OPTION
MAX PRESENCE
OFF
EOG
SCANNING
EXTENSION
SENSITIVITY
DELAY
PULSE
SECONDS
3
2
1
4
ON
©
Bargraph
•Vehicle Signal Strength
•Frequency Setting
•Output Mapping
Loop Input LED Indicators
•Call
•Loop Failure
•Loop Fault has Occurred
Seven Segment Display
•Parameter Values
•Frequency Reading
•Inductance Value
•-∆L/L Value
•Output Mapping
•Type of Loop Failures:
•L hi = Open Loop
•L lo = Shorted Loop
Numbered Loop Symbols
•Loop Input Channel Displayed
•Flashing = Program Mode
UP Pushbutton
•Increments Values
•Toggles ON and OFF
•Activates Detector Diagnostic
Features
DOWN Pushbutton
•Decrements Values
•Toggles ON and OFF
•Activates Detector Diagnostic
Features
Channel Select Pushbutton
•Change Displayed Loop Input
Channel - Press and Release
•Exit Program Mode - Press and
Hold for 1 second
•Reset Channel - Press and Hold
for 3 seconds
•Change Output Mapping
Parameter - Press and Release
Function Select Pushbutton
•Press momentarily to enter
Program Mode and to step
through parameters
VITAL AUX LED Indicator
•Output Status - On / Off
•Output Failed Self-check
VITAL IN LED Indicator
•Input Status - On / Off
•Input Failed Self-check
VITAL OUT LED Indicator
•Output Status - On / Off
•Delay Time Activated
•Extend Time Activated
•Output Failed Self-check
Parameter Description
•Name of Parameter
•Timer in Operation
DB-9 RS-232 Connector
•Communications Port

889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 12 of 33
Section 5 Installation and Set-Up
Mount P-1400 in the enclosure (see diagrams below). Connect 12 VDC power, Loops, Check Loops, the Vital
Input, and the Vital Outputs to the terminals marked on the motherboard as detailed below and apply power. If a
loop is not connected to a loop terminal, the detector will see a failed loop and deactivate the Vital Output if it is
mapped. The Loop Status for loop inputs with no loop connected must be turned off (see Sensitivity) or not
assigned (mapped) to a Vital Output (see Vital Output Mapping). If the detector is not new from the factory, it
may be advantageous to restore all factory default settings to avoid having to check every setting for every loop
input channel. To restore all factory default settings, disable the password protection feature as explained below.
Press and hold all four pushbutton switches simultaneously for five seconds. When all four pushbuttons are
depressed and held, the display will start counting down from five (5). When the countdown reaches zero (0),
releasing the pushbuttons restores the factory default settings. Releasing any or all of the switches before the
countdown ends aborts the full restore operation. Caution: Restoring the factory default settings will clear all
previously programmed settings including any mapped output(s).
All operating parameters can be adjusted from the front panel. The detector continues to operate normally while it
is in the Program Mode. The value currently displayed is always the actual value being used. Example: If you are
changing the delay time, the time displayed at the instant that a vehicle entered the detection zone for that loop
input channel would be the value used for the delay timer.
Pressing the FUNC pushbutton enters the Program Mode. The FUNC pushbutton has an auto repeat function.
This allows quick navigation to the desired parameter. The FUNC pushbutton only moves forward through all of
the parameters. There is no way to move backwards through the parameters.
While viewing any parameter, pressing the CHAN pushbutton will display the same parameter in the next loop
input channel. The currently selected channel is indicated at the bottom of the LCD display. Pressing and holding
the CHAN pushbutton for one second will exit the Program Mode and return to the Normal Mode.
Pressing and holding either the (UP) or (DOWN) pushbutton will cause the value to change rapidly until the
pushbutton is released.
Disabling Password Protection
To change any detector setting, the password protection feature must be disabled. When viewing a setting in the
Program Mode, press the (UP) or (DOWN) pushbutton to enter password entry mode. The LCD will display
PSd to provide an indication that a valid password must be entered before any detector setting can be changed.
NOTE: Pressing the CHAN button for two seconds at any time will exit password entry mode. Press the (UP)
or (DOWN) pushbutton. The LCD display will change to 000 with the leftmost 0flashing. Press the 
(DOWN) pushbutton to change the flashing digit to 9. Press the CHAN pushbutton a second time to get the center
0to flash. Press the (UP) pushbutton to change the flashing digit to 1. Press the CHAN pushbutton a third time
to get the rightmost 0to flash. Press the (UP) pushbutton to change the flashing digit to 1. Press the FUNC
pushbutton to enter the password. Detector settings can now be changed. Press the FUNC pushbutton to enter the
password. Detector settings can now be changed. Password protection can be re-enabled by pressing and holding
the CHAN pushbutton for two seconds followed by pressing the (UP) pushbutton twice. If no action is taken to
re-enable the password protection feature, it will be automatically re-enabled 15 minutes after changing any
detector setting.

889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 13 of 33
P-1400 Motherboard Dimensions
1.75
4.00
1.50
3.75
1.00
6.55
11.00
7.50
Detector
Electronics
Housing
3.41 Diameter
Hole in Motherboard
.19 Diameter Mounting
Hole (4X)
8.25
4.50

889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 14 of 33
P-1400 Mounting Diagram
P-1400 Wire Connection Detail
Strip back the insulation on each wire
approximately 0.50 in.
Insert a small flat blade screwdriver into
the rectangular slot on the connector and
lift to open the terminal contacts.
Insert the stripped wire into the large
round hole and remove the screwdriver.
Make certain that the terminal contacts
have engaged the wire conductor, not the
wire insulation.
5.1 INITIAL INSTALLATION START-UP MODE DISPLAY SCREENS
Upon application of power, the LCD screen will show the detector model letter and
firmware version, in this case, Model P-1400 firmware version 3. This screen will be
displayed for two seconds.
The next LCD screens displayed will show the Detector ID setting. The
display will toggle between the two screens shown with a 50% duty
cycle. When shipped from the factory, the Detector ID is set to 255 and
the detector is considered to be uninitialized. This will be the case on
initial start-up. Before proceeding, the detector ID must be changed to
something other than 255. To do so, use the (UP) or (DOWN)
pushbutton to change the setting to the desired ID number. When set to
the correct value, press the FUNC pushbutton to accept and store the
setting. If the detector in question is being used as the master unit when
utilizing the Synch feature, the Detector must be assigned an ID value of
000.
ENCLOSURE BOTTOM
MALE / MALE STANDOFF
PCB MOTHERBOARD
#8 FLAT WASHER
#8 LOCK NUT
THREADED HOLE
THROUGH HOLE
©
©
©