Reno A&E P-1400 Operations Manual
P-1400
Loop Detector
Firmware Version 4.02
Operations Manual
Four Channe l Menu Drive Programmable Inductive Loop Vehicle
Detector Designed for Railroad Applications
Four Loop Inputs, Two Vital Outputs, a nd One Vital Input
Built-in Loop Analyzer for Each Channel
This manual contains technical in formation for the
P-1400 Loop Detector
pn 889-1600-04 Revision: April 2020
THE FOLLOWING PRODUCT WAS DESIGNED, INSPECTED , TESTED AND
MANUFACTURED IN THE USA BY EBERLE DESIGN, INC. IN PHOENIX, ARIZONA.
INFORMATION CONTAINED HEREIN IS PROPR IETARY 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
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 DOCU M EN T ED .
© COPYRIGHT
MAINTENANCE NOTE
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 Extens io n ................................................................................................................ 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
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 : P i n As s i g n ments (DB-9 Communication Interface Connector) ...................................................... 10
Section 4 User Interface ........................................................................................................................................ 11
Section 5 Installatio n 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 Messa ge Display Screens ................................................................................................................. 24
5.5 Loop Check Pass / Fail Indications ........................................................................................................... 25
5.6 Vital Input (VITAL IN) Status / Fail I nd icat ions ....................................................................................... 26
5.7 Primary Vital Output (VIT AL OUT) St a tus / Fail Indic a t io ns ................................................................... 26
5.8 Auxiliary Vital Output (VITAL AUX) Status / Fail Indications ................................................................ 26
5.9 Sync h Fa i l I nd ic a t i o ns ............................................................................................................................... 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 Settin g Sensit ivity Using the Bargrap h .................................................................................................... 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 Tr o uble shooting ...................................................................................................... 32
8.1 Basic Troubleshooting Tips ...................................................................................................................... 32
8.2 Things to Know About Loops ................................................................................................................... 33
................................................................................................................................................. 6
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 Mode l 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 sidesw ipe protection, interlocking and movea ble bridge occupancy detection, or
detection of roadway vehicles and/or railway vehicles in at-grade crossing sites.
The Model P-1400 monitors and process es signals from four loop / lead-in circuits, four check loop circuits, and
one Vital input. These inputs can be pro grammed to co ntrol two Vital o utputs, one pr imary Vital o utput and one
auxiliary Vital output. The primary Vital output ca n be controlled by any combination of t he four loop inputs
and/or the Vital input. In addition to the four loop inputs and the Vital input (as described above), the a uxiliary
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 ca n be programmed to s imulate a vehicle detection (every 1 t o
255 minutes) in the loop area as a means of verifying p roper loop operatio n. T he Vital o utputs a nd Vita l 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 outp uts will be de act ivated. I f the sta te of e ither V ital o utput is not correct, t he
front panel LED corresponding to that output will turn red and both Vital outputs will b e de a ctivated.
A Liquid Crystal Display (LCD ), seve n LEDs, and four f r ont panel pushb uttons a re used t o displa y 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 co nnector is used for communication with a
laptop computer.
The use of a LCD is one feature that disti nguishes this detector from that of other manufacturers. It a llows for
more information, never before a vailable, to be displayed to the user during normal operat ion 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 cont inues to operate normally
while being programmed. An eight-se g me nt ba r gr a p h a t t he 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 firs t bar grap h seg ment repre s e nt s
the minimum inductance change necessary for the detector to output a call. Larger inductance changes will be
indicated by more segments. Each additio nal segment represents the next sensitivity le vel exceeded. Therefore,
the bar grap h indicates if the se nsitivity is se t too high or too low, easily facilita ting the idea l setting of se nsitivity
level.
All programmed settings are stored in non-volatile memory and can only be changed by programming new
settings. Memory stora ge consists o f an internal EEPROM mounted on the processor board and an EEPROM
mounted on the motherboard. Settings programmed on either compone nt must match those programmed on the
other for the detector to operate. Loss of power or a detector reset will not change the programmed sett ings. If a
loop failure occurs, the LCD will display the type of loop failure as L lo (for -25% change or shorted loop
condit ions) or L hi (for +25% change or open loop cond itions). Eac h loop failure is counted ( up to a maximu m of
255 failures) and accumulated in the Loop Failure Memory. Information on the number of failures since t he last
detector reset or power interruption is very useful during analysis of problems due to intermittent loop operat ion.
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 sa me 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, t he Model P-1400 detector disp la ys t he re al
time loop frequency reading for each channel. The eight frequency levels can be incremented or decremented to
provide precise frequency settings. This re moves the guesswork when changing frequency sett ings to eliminate
crosstalk. NOTE: Adjacent loops connected to different channels of a non-scanning detec tor or different sca nning
detectors should be set to different frequencies with the maximum separatio n possible.
The Reno A&E Model P-1400 utilizes the first major innovat ion in inductive loop detectors since the introduct ion
of digital detectors. The programming o f all of the detector’s parameters with four normally ope n pushbutton
switches not only simplifies setup by removing binary coded rotary or DIP switches, but also increases the
reliability of the detector by removing t he dependence on switch co ntacts during normal operation. T he detailed
descriptions displayed on the LCD facilitate the interpretation of operational state conditions to determine the
detector status.
889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 1 of 33
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 a nd the compo nents o f the lo op
oscillator circuit. The digital display of t he actual loop operating frequency for each setting makes it easy to
quickly identify and elimina te crosstalk in the most difficult to configure installations. The freque ncy 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 sensitivit y levels per loop input, plus Continuous-Call a nd Loop-Off. The sensiti vity
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 sensit ivity level.)
C
ONTINUOUS-CALL: When set to the Co ntinuous-Call state, the Loop Status is continuo usly 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 Cont inuo us-Call state w ill deactivate the V ital Output. The loop oscilla tor is disa bled 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 Progra m Mode a nd is useful for checking contro ller response and other t roubleshooting
activities.
L
OOP-OFF: When set to the Loop-Off state , the Loo p Stat us is con tinuo usly i n 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 activit ies.
2.3 OPTION 1: LOOP INDUCTANCE DISPLAY
The Loo p I nd uc tance Dis play set t in g c a n be toggled ON or OFF by mome nt a rily pre s s in g e it her the (UP) or
(DOWN) pus hbu tto n. W hen t his opt io n is enab led ( ON), the LCD dis pla ys t he t ota l lo op inductance (actual loop
inductance plus actual lead-in inducta nce) in microhe nries fo r loop ind uctanc e values in the ra nge of 20 to 25 00
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 mo mentari ly press ing eit her the
(UP) or (DOWN) pushbutton. When this option is enabled (ON), the LCD displays the percentage of
induct ance cha nge (-ΔL/L value) during the Ca ll 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. T his 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 Optio n 3 is set to 3.00, the option is
disab led (OFF), a nd normal noise filtering is used. W hen Option 3 is set to 3.01, 3.02, or 3.03 the option is ON,
and increased filtering of the loop signa l is used to eliminate problems assoc iated with particular types of noise.
Turning this option ON when not required can degrade the performance of the detector. The default setting o f t his
option is 3.00 (OFF). This op tion 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 t rack ou t the vehic le (i.e.
drop the detection of the vehicle) in four minutes to several hours depending on the amount of
inductance chan ge (-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 wil l provide e xtended
detection times.
There are man y fac tors tha t in flu ence t he p roper s ett in g of this op tion. A full expla nat ion of h ow to
determine the correct setting is beyond the scope of this manual. Contact a Technical Support
representative at Reno A&E regarding proper settin g 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 = Tracki ng R ate 0.
4.01 = Tracki ng R ate 1.
4.02 = Tracki ng R ate 2.
4.03 = Tracki ng R ate 3.
4.04 = Tracki ng R ate 4.
4.05 = Tracki ng R ate 5.
4.06 = Tracking Rate 6.
4.07 = Tracki ng R ate 7.
4.08 = Tracki ng R ate 8.
2.7 OPTION 5: SENSITIVITY BOOST
Each loop input’s Option 5 has five settings ranging from 5. 00 to 5.04. W hen Optio n 5 is set to 5. 00, the opt ion is
disab led (OFF), a nd no sensitivity boost is added. W hen Option 5 is set to 5.01, 5.02, 5.03, or 5.04 the option is
ON, and sensitivity boost is enabled. A fter detect ion, the se nsitivity is boosted to t he currently se lected se nsitivit y
level p lus the nu mber of le vel(s ) select ed. The maximu m sens itivit y level that ca n be ob tained w ith or witho ut
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 Signa l setting can be toggled ON or OFF by mome nta r ily p re ss i ng e ithe r the
(UP) or (DOWN) pus hbutton. Only one loop input can be turned ON at a t ime. T ur ning this option ON for o ne
loop i nput auto matica lly turns it OFF for the other loop inputs. When this option is enabled (ON), an audi ble
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 disp lay as well. NOTE: This option
is automatically disabled 15 minutes after activation or on loss o f power.
889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 3 of 33
2.9 LOOP CHECK
The Loop Check feature provides a means of auto matically verifying the proper operation of each loop circ uit.
The Loop Check Timer can be set for an interval ranging from 0 to 255 minutes in o ne-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 s ignature for communication purposes . Detector ID settings can range from
000 to 255. If, however, t he detec tor is set to an ID value of 255, it is co ns idered to be in an uninitialized state a nd
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 betwee n id and 255 until the ID setting is changed to something other than 255 and the new
setting is saved in detector memor y. Whe n a ny detecto r is first initialized, its ID setting is, by default, 255.
2.11 OPTION 7: SYNCH FEATURE
This option provides a means o f linking together up to four (4) P-1400 detectors. Each detector’s Option 7 has
three settings ranging from 7.00 to 7.02. T here are two modes of Synch, Ser ies Synch and Para llel Synch. W hen
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 dete ctors.
When se t to o perate in Parallel Sync h 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 m ust 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 ei ther the (UP)
or (DOWN) pushbutton. When Option 10 is enabled (ON), the Auxiliary Vita l Output will assu me the state
opposite to that of the Primar y Vital Output. When the Primary Vital Output de activates, the Auxiliary Vital
Output will activate. When the Primary Vital Output activates, the Auxiliary V ita l Output will deactivate.
Loop failures or loop check test failures w ill deactivate the Primary V ital Output and activate the Auxilia ry Vital
Output. If either Vital Output fa ils 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 rega rdless of the setting of Option 10.
2.13 PRIMARY VITAL OUTPUT DELAY
The Primary Vital Output ca n be condition ed with a Delay ti me that is adjustable from 0.0 to 25.5 s econds in 0.1second steps. Primary Vital O utput Delay time sta rts counting dow n when a Call state is received fro m the Loop
Status Inp ut o r Vit al I np ut tha t is mapp ed t o the Pr ima ry Vital Output. When the timer reaches zero, the Primary
Vital Output is deactivated. Primary V ital Output Delay does not condition the Auxilia ry Vital Output.
2.14 PRIMARY VITAL OUTPUT EXTENSION
The Pr i ma r y V i t a l O u t p ut c an be co ndition e d with an E x t e nsion ti me tha t is adjustab le from 0.0 to 25.5 sec onds 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 t he Primary Vital Output. The Primary Vital Output will remain
off until the Extension time reaches zero. Any vehicle enter ing the loop detect ion zone during the E xtension 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 E xtension time starts count ing down again. Primary V ital Output
Extension does not co ndition the Auxil iary Vital Output.
2.15 INPUT / OUTPUT MAPPING
The Loop Status Inputs and/or Vital Input can be assigned to either or both of the Pri ma ry Vital and Auxiliary Vital
Outputs. Health Status can only be mapped to the Auxiliary Vital Output.
889-1600-04 Model P-1400 Operations Manual Rev Apr 2020 Page 4 of 33
2.16 FULL RESTORE TO FACTORY DEFAULT SETTINGS
Pressi ng a ll fo ur fr o nt pa ne l pus hb ut to n s wit c hes s imu lta ne o us ly a nd co nt inu o us ly f or f ive (5) seconds restores all
factory default settings. The countdown of the five se cond period is displayed on the LCD. Releasing any or all of
the switches before the countdown ends aborts t he 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) pushb utton will
temporarily activate Option 1 (Loop Inductance Display) and Opt ion 2 (Loop Inductance -ΔL/L Display) for all
loop inputs and Option 6 (Audib le Detect S ignal) for the loop input ind icated in the lower port io n 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 gua rd against the accidental change of detector settings. In order
to change any detector setting, a va lid 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).
S
IZE: 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 mot herboard and is 6.5 inches ( 16.51 cm) long x 2. 5 inches (6.35 c m) wide x 5 inches
(12.7 cm) deep (depth to the motherboard).
O
PERATING TEMPERATURE: -40° F to +180° F (-40° C to +82° C).
C
IRCUIT BOARD: Processor, power supply, LED, and LCD printed circ uit 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 wit h 2 oz.
copper on both sides and plated through holes.
I
NTERFACE CONNECTOR: (Communications, COMM PORT) DB-9, ni ne pi n, right angle, PC Board mount, metal
shell, D subminiature receptacle with gold plated female contacts and nuts for retaining screws.
M
OTHERBOARD 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.
F
USE: 3 amp, ATO / ATC (automotive) type located in a fuse holder mounted on the motherboard.
P
OWER DOWN: When the DC voltage drops be low the low power detection threshold (7.8 VDC ), the detector will
save all needed information to hold calls thro ugh the power down seque nce. Upon power res toration (a minimu m
of 9.0 VDC), the detector will use this saved data to determine the correct occupancy state of all loops.
L
OOP FEEDER LENGTH: Up to 1500 feet (450 m) maximum with proper feeder cab le and appropriate loops .
L
OOP INDUCTANCE RANGE: 20 to 2500 micro Henries w ith a Q factor of 5 or greater.
L
OOP INPUTS: Transformer isolated. The minimum capacitance added by the detector is 0.068 microFarad.
L
IGHTNING PROTECTION: The detector can tolerate, without damage, a 10 microFarad capacitor charged to 2,000
volts being discharged directly into the loop input terminals.
R
ESET: Application of a 30 millisecond low s tate (relative to input +12 VDC) to the Reset terminal on the
motherboard resets all loops. Each loop can be manually reset b y selecting the loop input then pressing and
holding the front pane l CHAN pushbutton for three seconds, or by changing the sens itivity or loop frequency o f
the loop input.
S
YNCHRONIZE SCAN CONTROL: The SYNCH IN inp ut a nd 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 w ill vary depending on
the number of detectors (up to a maximum of four) on the Synch Line. (See Section 3.4.)
V
ITAL OUTPUTS: T he P r ima r y and Aux iliary Vital Outputs are transformer isolated and are capable of sourcing 200
mA at 12 VDC. Opto-isolated circ uitry verifies t hat the Vital Ou tput is in the des ired state. If either Vital Outp ut
fails its self-check, both of the detector’s Vital Outputs will be deactivated.
V
ITAL INPUTS: 12 volt input isolated from the dete ctor. Opto-isolated c ircuitry verifies that t he Vital Inputs are
operational.
C
HECK LOOP RELAYS: Contacts rated for 6.0 Amps maximum, 150 VDC, 300 VAC, a nd 500 VA maximum
switched power.
3.3 OPERATIONAL
LOOP STATUS INDICATORS: Ea c h lo op input has a s uper high intens ity red light emitt ing diode ( LED) to ind icate a
Call (vehicle detected over loop) or failed loop.
I
NPUT / OUTPUT INDICATORS: The detector has t hree dual color (green / red) LEDs to indicate the following:
VITAL IN LED Status Meaning
OFF Vital Input is deactivated (low voltage level).
ON (GREEN) Vital Input is activated (high volta ge leve l).
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