Rae 2018 User manual

This manual contains technical information for the
Model 2018 Conflict Monitor
pn 889-3809-00 Revision: April 2020
Model 2018
Conflict Monitor
Firmware Version 01.07.00
Operations Manual
CALTRANS TEES-2002 Conflict Monitor Unit

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 2018 Operations Manual
Table of Contents
Section 1 General Description......................................................................................... 1
Section 2 General Characteristics................................................................................... 3
2.1 Inputs3
2.1.1 AC Line ( AC + )............................................................................................ 3
2.1.2 AC Neutral ( AC - )........................................................................................ 3
2.1.3 Earth Ground ................................................................................................ 3
2.1.4 Field Terminals (Reds, Yellows, and Greens)................................................ 3
2.1.5 Red Enable................................................................................................... 4
2.1.6 Special Function Inputs................................................................................. 4
2.1.7 MC Coil Input................................................................................................ 4
2.1.8 DC Ground.................................................................................................... 4
2.1.9 +24VDC Input............................................................................................... 4
2.1.10 Watchdog Timer Input................................................................................. 5
2.1.11 External Reset Input.................................................................................... 5
2.1.12 Cabinet Interlock......................................................................................... 5
2.2 Outputs .................................................................................................................. 5
2.2.1 Output Relay................................................................................................. 5
2.2.2 Stop Timing Output....................................................................................... 5
2.3 Programming Card................................................................................................. 5
2.3.1 Channel Compatibility (Permissives)............................................................. 6
2.3.2 Yellow Disable .............................................................................................. 6
2.4 Features................................................................................................................. 6
2.4.1 Monitor Power Up / Power Recovery............................................................. 6
2.4.2 Monitor Power Failure................................................................................... 6
2.4.3 Reset............................................................................................................ 7
2.4.4 COM Port...................................................................................................... 7
2.4.5 Temperature Sensor..................................................................................... 7
2.4.6 Real Time Clock............................................................................................ 7
2.4.7 Up Time Accumulator.................................................................................... 7
2.4.8 Configuration Monitoring (Beeping Monitor) .................................................. 7
2.4.9 Factory Setting.............................................................................................. 8
2.4.10 User Unit Information.................................................................................. 8
2.5 Fault Monitoring ..................................................................................................... 8
2.5.1 Conlfict Monitoring........................................................................................ 8
2.5.2 Red Fail Monitoring....................................................................................... 9
2.5.3 Dual Indication Monitoring............................................................................10
2.5.4 Short Yellow Monitoring ...............................................................................10
2.5.5 Short Clearance Monitoring..........................................................................11
2.5.6 +24 Volts DC Monitoring..............................................................................12
2.5.7 Watchdog Monitoring...................................................................................12
2.5.8 Programming Card Absent Monitoring .........................................................13
2.6 Operation Modifiers...............................................................................................13
2.6.1 Option Switches...........................................................................................13
2.6.1.1 Option Switch 1 – Flashing Don’t Walk Monitoring – DW MON ...........13
2.6.1.2 Option Switch 2 – Flashing Yellow Arrow Monitoring – FYA EN..........13
2.6.1.3 Option Switch 3 - +24VDC Enhanced Monitoring – 24V ENH .............14
2.6.1.4 Option Switch 4 – Special Function 1 Invert – SF1 INV.......................15
2.6.1.5 Option Switch 5 – Special Function 2 Invert – SF2 INV.......................15

2.6.1.6 Option Switch 6 – Green / Yellow Monitoring – GY MON....................15
2.6.1.7 Option Switch 7 – 2010 Mode – 2010 .................................................15
2.6.1.8 Option Switch 8 – LED Threshlods – LED THR...................................16
2.6.2 Option Jumpers............................................................................................16
2.6.2.1 Option Jumper 1 – Do Not Allow 16 Channel Program Card – NO 16CH16
2.6.2.2 Option Jumper 2 – Do Not Allow 18 Channel Progrma Card – NO 18CH17
2.6.2.3 Option Jumper 3 – Red Enalbe Must Be Active (RED EN)..................17
2.6.2.4 Option Jumper 4 – Multi Indication & Short Yellow Monitoring – MI/SY
ON..................................................................................................17
2.6.3 Factory Options............................................................................................17
2.6.3.1 Green Flash ( Canadian Fast Flash)...................................................17
2.6.3.2 Fast Start Up ......................................................................................18
2.6.3.3 Low AC Power Thresholds..................................................................18
2.6.3.4 Diagnostic LCD...................................................................................18
2.6.4 Software Options .........................................................................................18
2.6.4.1 Log Field Changes..............................................................................18
2.6.4.2 FYA for Channels 1-4 Use Yellow Drivers (FYA 1-4 Uses Yel)............19
2.6.4.3 FYA for Channels 5-18 Use Yellow Drivers (FYA 5-18 Uses Yel)........19
2.6.4.4 Flashing Yellow Arrow Ignores Yellow Conflict (FYA Ignores YEL
Conflict)..........................................................................................20
2.6.4.5 Special Function 2 Enable ..................................................................20
2.6.4.6 Force Watchdog to 1500 Milliseconds (Force WD 1500 mSec)...........21
2.6.4.7 Disable Buzzer ...................................................................................21
2.6.4.8 Daylight Saving Time..........................................................................21
2.7 Event Logging.......................................................................................................21
2.7.1 Time Change Log ........................................................................................22
2.7.2 Monitor Reset Log........................................................................................22
2.7.3 Configuration Event Log...............................................................................22
2.7.4 Prior Faults Log............................................................................................22
2.7.5 AC Line Log.................................................................................................22
2.7.6 Signal Sequence Log...................................................................................22
2.8 Diagnostics ...........................................................................................................22
2.8.1 Memory........................................................................................................23
2.8.2 Microprocessor Monitor................................................................................23
2.8.3 Internal Voltage Monitors .............................................................................23
2.8.4 LED DIsplay Test.........................................................................................23
2.8.5 Diagnostic Codes.........................................................................................24
Section 3 Specifications .................................................................................................25
3.1 Physical.................................................................................................................25
3.2 Electrical ...............................................................................................................25
3.3 Timing Functions...................................................................................................26
3.4 Table: Rear Edge Connector Pin Assignments......................................................27
3.5 Table: Front Panel Connectors Pin Assignments...................................................28
3.6 Table: Programming Card Pin Assignments..........................................................29
Section 4 User Interface..................................................................................................30
4.1 Printed Circuit Board Switches & Jumpers ............................................................31
4.1.1 Dual Indication Enable Switches..................................................................31
4.1.2 Red Fail Switches ........................................................................................31
4.1.3 Option Switches...........................................................................................31
4.1.3.1 Switch 1 – Flashing Don’t Walk Monitoring (DW MON).......................31
4.1.3.2 Switch 2 – Flashing Yellow Arrow Enable (FYA EN) ...........................31
4.1.3.3 Switch 3 - +24VDC Enhanced Monitoring (24VDC ENH)....................32
4.1.3.4 Switch 4 – Special Function 1 Invert (SF1 INV)...................................32
4.1.3.5 Special Function 2 Invert (SF2 INV)....................................................32
4.1.3.6 Switch 6 – GY-Dual Indication Monitoring (GY MON)..........................32
4.1.3.7 Switch 7 – 2010 Mode (2010) .............................................................32

4.1.3.8 Switch 8 – LED Thresholdes (LED THR) ............................................32
4.1.4 Option Jumpers............................................................................................32
4.1.4.1 Jumper 1 – Do Not Allow 16 Channel Program Card (NO16CH).........33
4.1.4.2 Jumper 2 – Do Not Allow 18 Channel Program Card (NO 18CH)........33
4.1.4.3 Jumper 3 – Red Enable Must Be One (RED ON)................................33
4.1.4.4 Jumper 4 – Multiple Indication & Short Yellow Monitoring are Always
ON (MI/SY ON)...............................................................................33
4.1.5 Watchdog Switch.........................................................................................33
4.2 Front Panel LED Indicators ...................................................................................33
4.2.1 Field Status Indicators..................................................................................33
4.2.2 AC Power Indicator......................................................................................34
4.2.3 VDC Failed Indicator....................................................................................34
4.2.4 WDT ERROR Indicator................................................................................34
4.2.5 CONFLICT Indicator ....................................................................................34
4.2.6 RED FAIL Indicator......................................................................................34
4.2.7 MULT IND Indicator .....................................................................................35
4.2.8 YELLOW Indicator .......................................................................................35
4.2.9 PC AJAR Indicator.......................................................................................35
4.2.10 DIAG FAIL Indicator...................................................................................35
4.2.11 COMM Indicator.........................................................................................35
4.2.12 Function Disabled Indication ......................................................................35
4.3 Audible Buzzer......................................................................................................35
4.3.1 Critical Failure..............................................................................................36
4.3.2 Configuration Change..................................................................................36
4.4 Diagnostic Display Mode.......................................................................................36
4.4.1 AC Line Voltage...........................................................................................38
4.4.2 Configuration Display 1................................................................................38
4.4.2.1 Permissive Displays............................................................................38
4.4.3 Configuration Display 2................................................................................39
4.4.3.1 Flashing Yellow Arrow Displays..........................................................39
4.4.4 Prior Faults ..................................................................................................40
Section 5 Firmware Upgrade ..........................................................................................41

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 1of 41
Section 1 General Description
This product manual is for people installing, operating, and maintaining the Reno A & E Model 2018 Conflict
Monitor Unit (CMU). We designed the Reno A & E Model 2018 monitor to meet or exceed the specifications in
Chapter 3, Section 6, of the Caltrans Transportation Electrical Equipment Specifications (TEES) dated 08/16/02.
Section 6 responds to the need for a monitor to accomplish the detection of, and response to, improper and
conflicting signals and improper operating voltages in a Controller Assembly (CA). This standard provides
interchangeability between units of different manufacturers. We developed this eighteen-channel monitor to allow
users to take full advantage of all eighteen load switch positions in a Model 332 cabinet with three output files.
This monitor is backward compatible with sixteen-channel monitors.
The Model 2018 detects the presence of voltage on conflicting field connection terminals; it detects the absence of
proper voltages on all of the signal field connection terminals of a channel, and it monitors for the presence of
satisfactory operating voltages within the Controller Unit (CU) and the Model 2018 itself. If any of these
conditions exist or are out of tolerance for the minimum time defined in Chapter 3 Section 6 of the Caltrans
Transportation Electrical Equipment Specifications (TEES) dated 08/16/02, the Output relay’s normally open
contacts will transfer from the no fault state (relay energized) to the fault state (relay de-energized). The closure of
the Output relay contacts will cause the transfer of the traffic signals to Flashing Operation. The fault is recorded
by the Model 2018 and displayed on the appropriate LED indicators.
The Model 2018 monitor can operate in one of several basic configurations:
210 Monitor timings with 16 Channels using standard incandescent field display thresholds.
210 Monitor timings with 18 Channels using standard incandescent field display thresholds.
210 Monitor timings with 16 Channels using LED field display thresholds.
210 Monitor timings with 18 Channels using LED field display thresholds.
2010 Monitor timings with 16 Channels using standard incandescent field display thresholds.
2010 Monitor timings with 18 Channels using standard incandescent field display thresholds.
2010 Monitor timings with 16 Channels using LED field display thresholds.
2010 Monitor timings with 18 Channels using LED field display thresholds.
The differences between the 210 mode and the 2010 mode are:
AC Power -In the 210 mode, the AC Line voltage is considered valid at >98VRMS and invalid at
<92VRMS. In the 2010 mode, the AC Line voltage is considered valid at > 103VRMS and invalid at
<98VRMS. (Now a new Factory Option)
Watchdog Timer Fault - In the 210 mode, a fault occurs if this input does not change states within
1500 milliseconds of the last state change. In the 2010 mode, a fault occurs if this input does not
change states within 1000 milliseconds of the last state change.
Stop Timing - In the 210 mode, the Stop Timing output releases at the same time the Fault Relay
returns to the no fault state. In the 2010 mode, the Stop Timing output releases 250 milliseconds
before the Fault Relay returns to the no fault state.
Red Fail Timing - In the 210 mode, the Red Fail monitoring function will ignore faults of less than
700 milliseconds duration and trigger on faults of more than 1000 milliseconds duration. In the 2010
mode the Red Fail monitoring function will ignore faults of less than 1200 milliseconds duration and
activate on faults of more than 1500 milliseconds duration.
Red Enable - In the 210 mode, a state change of the Red Enable input is recognized when it is in a
state for at least 100 milliseconds. In the 2010 mode, a state change of the Red Enable input is
recognized when it is in a state for at least 400 milliseconds.
The differences between the 16-channel and 18-channel mode are:
The 16-channel mode of operation can only be selected by inserting a 16-channel diode card into the
monitor. In the 16-channel mode the monitor will only check the first 16 channels of the monitor for
faults. Channels 17 and 18 are checked to ensure that no green or yellow input is active while the
monitor is in the 16-channel mode. An active green or yellow on channel 17 or 18 will cause the
monitor to transfer to the fault state with the PC AJAR and CONFLICT indications lit. While the
monitor is operating normally in the 16-channel mode the red, yellow and green indications for
channel 17 and 18 will display the function inhibited indication.
The 18-channel mode of operation can only be selected by inserting an 18-channel diode card into the
monitor. In the 18-channel mode the monitor will perform the same fault tests for channels 17 and 18
as it would for the other 16 channels.
The differences between standard incandescent field display thresholds and the LED field display thresholds are:
With the incandescent thresholds, the monitor senses greens and yellows as ON when their voltage is
above 25VRMS and OFF when below 15VRMS. Reds are ON when their voltage is above 70VRMS and

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 2of 41
OFF when below 50VRMS. Red Enable and Special Function Inputs are ON when their voltage is
above 70VRMS and OFF when below 50VRMS.
With the LED thresholds, the monitor—when checking for Conflicts, Multiple Indications, and Short
Yellows— senses greens, yellows, and reds as ON when their voltage is above 25VRMS and OFF when
below 15VRMS. The Red Fail checks greens, yellows, and reds as ON when their voltage is above
70VRMS and OFF when below 50VRMS. Red Enable and Special Function Inputs are ON when their
voltage is above 70VRMS and OFF when below 50VRMS.
The signal monitor portion of the monitor checks for the presence of voltage on conflicting field connection
terminals in the Controller Assembly. For the purpose of conflict determination, a signal on any of the Green or
Yellow inputs associated with a channel shall be considered as that channel being active.
The signal monitor portion of the monitor also checks for the absence of any required signal voltage on each
channel at the field connection terminals in the Controller Assembly. For this purpose a signal on the Green,
Yellow, or Red inputs associated with a channel shall be considered as that channel being active.
The voltage monitor portion of the monitor is capable of monitoring the Controller Watchdog output that indicates
satisfactory operating conditions in the Controller Unit and the +24 volt direct current power supply.
The Model 2018 is fully programmable. An interchangeable Program Card is provided to allow the assignment of
permissive or compatible channels. Programming is accomplished through the use of diodes soldered on the
Program Card. The Program Card may be a sixteen- or eighteen-channel card. The Program Card is inserted into
the monitor through a slot in the front panel. Two jumpers on the main board are available to force the monitor to
accept only one of the two types of program cards.

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 3of 41
Section 2 General Characteristics
The Model 2018 monitor was designed to meet and/or exceed the specifications in Chapter 3 Section 6 of the
Caltrans Transportation Electrical Equipment Specifications (TEES) dated 08/16/02. The Model 2018 monitor
includes several features designed to enhance the safety and operation of the monitor. These features extend the
Model 2018 monitor features beyond the requirements of the Caltrans standards.
2.1 INPUTS
2.1.1 AC LINE ( AC + )
The over-current protected side of 120-volt AC 60 Hz source. This input (Rear Edge Connector - Pin FF) is used
to generate the voltages required to operate the monitoring logic.
The monitor has a printed circuit board mounted over-current protection device in the 120-volt AC input to the
unit. This fuse is a 1/4 AMP SLO-BLOW and should only be replaced with a fuse of the same type and value.
Typical Connection: Cabinet AC Line power source.
2.1.2 AC NEUTRAL ( AC - )
The un-fused and un-switched return side of 120-volt AC 60 Hz power source is taken from the neutral output of
the AC power source. This input (Rear Edge Connector - Pin 21) is the referenced signal for all field terminal
voltage sensing inputs. This input is not connected to Logic Ground or Earth Ground within the unit.
Typical Connection: Cabinet AC Neutral.
2.1.3 EARTH GROUND
The monitor has an input terminal (Rear Edge Connector - Pin U) providing an independent connection to the
chassis of the unit. This input is not connected to DC Ground or AC Neutral within the unit.
Typical Connection: Cabinet Earth Ground.
2.1.4 FIELD TERMINALS (REDS, YELLOWS, AND GREENS)
The monitor has 54 field terminal inputs (18 Greens, 18 Yellows, and 18 Reds). 38 of these inputs are through the
Rear Edge Connector (Channel 1-18 Greens, Channel 1-18 Yellows, and Channel 17 and 18 Reds). The other 16
inputs are through the front panel Red Interface Connector (Channel 1-16 Reds).
Each field terminal input is measured approximately 13,000 times per second to provide an accurate, true RMS
(root mean square) AC voltage regardless of distortions in the waveform or changes in line frequency. Both
positive and negative half wave rectified signals are sensed. The RMS voltage is calculated over the last two
cycles of the line power (approximately 33 milliseconds) every cycle of the line power for every AC input.
Voltages can be accessed in real-time via the serial port and are recorded in the Signal Sequence Log if a fault
occurs.
Three inputs are provided for each channel to permit the monitoring of voltages at the Green / Walk, Yellow, and
Red / Don’t Walk signal field terminals.
In the Incandescent Mode (Incandescent Field Displays):
A Green or Yellow signal input is sensed as ON when it exceeds 25VRMS and a signal input is sensed
as OFF when it is less than 15VRMS. Signals between 15VRMS and 25VRMS may be in either state.
A Red signal input is sensed as ON when it exceeds 70VRMS and a signal input is sensed as OFF when
it is less than 50VRMS. Signals between 50VRMS and 70VRMS may be in either state.
In the LED mode (LED Field Displays):
For the purpose of testing for Conflicts, Multiple Indications, Flashing Don’t Walk Monitoring, and
ensuring that channels 17 and 18 are OFF when a 16-channel program card is used, a Green, Yellow,
or Red signal input is sensed as ON when it exceeds 25VRMS and a signal input is sensed as OFF when
it is less than 15VRMS. Signals between 15VRMS and 25VRMS may be in either state.
For the purpose of testing for Red Fails, Co-Channel Childs, Short Yellows, and Short Clearance, a
Green, Yellow, or Red signal input is sensed as ON when it exceeds 70VRMS and a signal input is
sensed as OFF when it is less than 50VRMS. Signals between 50VRMS and 70VRMS may be in either
state.

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When the circuit connected to the sensing input of the unit exhibits high impedance characteristics such as those
caused by dimmers or burned out lamps, it may be necessary to place a low impedance device external to the unit
between the unit input and AC Neutral.
Typical Connections: Field terminals for channel Reds, Yellows, and Greens as appropriate.
2.1.5 RED ENABLE
The presence of the proper voltage at this terminal (Red Interface Connector - Pin 20) enables the monitor to detect
the absence of voltage on all field signal inputs of a channel.
The Red Enable input is sensed as ON when the input voltage exceeds 70VRMS and is sensed as OFF when it is less
than 50VRMS.
The Model 2018 will not recognize state changes of the Red Enable input while AC power is not valid. This
ensures that short power interruptions do not cause unintended state changes of the Red Enable input.
When the Red Enable input is sensed as OFF the Multiple Indication and Short Yellow monitoring will be disabled
unless the MI/SY ON (Multi Indication & Short Yellow Monitoring are Always ON) option jumper is installed.
Typical Connection: Control point that has 120VAC when the cabinet is in normal operation.
2.1.6 SPECIAL FUNCTION INPUTS
The monitor provides two Special Function inputs, Special Function 1 (Red Interface Connector – Pin 8) and
Special Function 2 (Red Interface Connector – Pin 6). The presence of an active signal on these inputs disables the
monitor’s ability to detect the absence of voltage on all field signal inputs of a channel (Red Fail monitoring).
The Special Function inputs are sensed as ON when the input voltage exceeds 70VRMS and are sensed as OFF when
it is less than 50VRMS.
The Model 2018 will not recognize state changes of the Special Function inputs while AC power is not valid. This
ensures that short power interruptions do not cause unintended state changes of the Special Function inputs.
There are two Option Switches (Special Function 1 Invert and Special Function 2 Invert) that allow the user to
invert the ON and OFF states for each of the Special Function inputs. The Special Func 2 Enable user option in
RaeComM must be selected in order for Special Function 2 to function.
Typical Connection: Unterminated or Preemption circuitry.
2.1.7 MC COIL INPUT
The monitor provides an input to monitor the state of the Mercury Contactor (MC) Coil (Rear Edge Connector –
Pin EE). When this input is ON, the monitor disables the following functions: Red Fail monitoring, Flashing Don’t
Walk monitoring, Multiple Indication monitoring, and Short Yellow monitoring.
The MC Coil input is sensed as ON when the input voltage exceeds 70VRMS and is sensed as OFF when it is less
than 50VRMS.
The Model 2018 will not recognize state changes of the MC Coil input while AC power is not valid. This ensures
that short power interruptions do not cause unintended state changes of the MC Coil input.
Typical Connection: MC Coil.
2.1.8 DC GROUND
A voltage reference point and current return for the External Reset input, Watchdog Timer input, +24 V Monitor
input, and +24 VDC input circuits. This termination (Rear Edge Connector - Pin Y) is not connected to either the
AC Neutral or Earth Ground within the unit.
Typical Connection: Power Supply DC Common.
2.1.9 +24VDC INPUT
A +24-volt DC input (Rear Edge Connector - Pin 23 & Pin AA) is monitored to assure proper +24 VDC levels.
The actual DC Voltage is measured and monitored at least 1000 times per second to ensure proper value. The 24
VDC Input can be accessed in real-time via the serial port. The actual voltage is also recorded in the Signal
Sequence Log if a fault occurs.
Typical Connection: Power Supply +24VDC.

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2.1.10 WATCHDOG TIMER INPUT
The Watchdog Timer input (Rear Edge Connector - Pin 22) is a logic level input. This signal must toggle
between the low state (nominal 0VDC) and the high state (nominal 24VDC). When not pulled low, the
input is internally biased to the high state (+24VDC). Actual Watchdog Timer voltage is measured and
monitored at least 1000 times per second to determine the status of the input. The actual DC voltage
level of the Watchdog Timer input can be accessed in real-time via the serial port. The actual voltage is
also recorded in the Signal Sequence Log if a fault occurs.
Typical Connection: Controller Watchdog Output.
2.1.11 EXTERNAL RESET INPUT
The External Reset input (Rear Edge Connector - Pin Z) is a logic level input. A voltage of less than 4VDC is
recognized as a low and a voltage greater than 12VDC is recognized as a high. This signal is low state for the true
state. When not activated, the input is internally biased to the false (high) non-operate state (+24 VDC). Actual
External Reset voltage is measured and monitored at least 1000 times per second to determine the status of the
input. The actual DC voltage level of the External Reset input can be accessed in real-time via the serial port. The
actual voltage is also recorded in the Signal Sequence Log if a fault occurs.
Typical Connection: Unterminated or tied to +24VDC. Should be used only for automated testing.
2.1.12 CABINET INTERLOCK
The monitor has two terminals internally connected to indicate the presence of the unit to the external circuitry.
These terminals are on the Rear Edge Connector - Pin 24 and Pin 25.
Typical Connection: Interlock circuitry that will not allow the cabinet to operate normally with the monitor
removed.
2.2 OUTPUTS
2.2.1 OUTPUT RELAY
The Output relay of the monitor has a set of isolated Form C contacts. These relay contacts are capable of
switching all loads in the range from two milliamps at 18 volts DC to three amperes at 135VRMS.
The open circuit of the Output relay is the circuit that is open when the unit is in the No Fault state and all voltages
are sufficient for proper operation of the Controller Assembly. The relay coil is energized in the No Fault state.
When operating in the 2010 mode, prior to the monitor transferring the Output relay contacts from the Fault state to
the No Fault state, a transition state with a duration of 250 milliseconds occurs. During the transition state the
Output relay contacts are the same as the Fault state and the monitor releases the Stop Timing output.
Typical Connection: Used to control the flash transfer relays.
2.2.2 STOP TIMING OUTPUT
The Stop Timing output of the monitor is an Open Collector output. When the output is active, the monitor will
pull the Stop Timing output down to 0.8 volts or less.
When operating in the 2010 mode, prior to the monitor transferring the Output relay contacts from the Fault state to
the No Fault state, a transition state with a duration of 250 milliseconds occurs. During the transition state, the
Output relay contacts are the same as the Fault state and the monitor releases the Stop Timing output.
Typical Connection: Stop Timing input of the controller.
2.3 PROGRAMMING CARD
The monitor is fully programmable and requires programming action to provide configuration information.
Programming is accomplished through the use of diodes and jumpers on an interchangeable Programming Card.
The Programming Card plugs into the monitor through a slot in the front panel. The monitor is constructed with
card guides to ease the insertion of the Programming Card. The Programming Card includes card ejectors to ease
removal of the Programming Card. The edge of the Programming Card is flush with the surface of the front panel
when it is properly seated in the program card slot of the monitor. The PC AJAR LED will illuminate if the
Programming Card is not properly seated while power is applied.
The monitor can use either a 16-channel Programming Card or an 18-channel Program Card. Refer to the table in
section 2.6 for Programming Card connector pin assignments. The monitor can be configured to accept both types

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 6of 41
of Programming Cards or only one type. When configured to select only one type, the PC AJAR LED will
illuminate if the inserted Program Card does not match the selected type.
See Section 3.5 for programming card connector pin assignments.
2.3.1 CHANNEL COMPATIBILITY (PERMISSIVES)
The monitor requires programming action to provide compatibility between channels. Programming is
accomplished through the use of diodes on an interchangeable Programming Card. The diodes are logically
labeled for easy identification by channel pairs. An installed functioning diode defines a pair of channels as
conflicting. Removing a diode (cutting or unsoldering) defines a pair of channels as permissive or compatible.
2.3.2 YELLOW DISABLE
The Programming Card has sixteen or eighteen pairs of 1.09 mm (0.043 in) diameter holes for programming
jumpers. One hole of each pair is connected to the Yellow Inhibit Common pin (pin #28). The sixteen or eighteen
jumper-hole pairs are logically labeled for easy identification of the channel numbers. A soldered wire jumper in a
jumper-hole pair disables short or skipped yellow monitoring, removes the yellow from the multiple indication test
for that channel, and removes the yellow from all conflict tests.
2.4 FEATURES
2.4.1 MONITOR POWER UP / POWER RECOVERY
When the AC+ input voltage exceeds 103VRMS (98VRMS if the factory option for Low AC Power Thresholds is
active) on power up or during power recovery, the monitor will begin a Power Up sequence.
On power up, the Output Relay contacts close.
The Stop Timing output becomes inactive.
The AC POWER indicator flashes at a 4 Hz rate.
A ten second max power up timer starts.
A four second delay is timed.
The monitor begins to count WATCHDOG TIMER transitions.
In the 210 mode of operation, if a transition occurs before the max power up timer
reaches ten seconds, the Output relay contacts open and all monitoring functions become
active.
In the 2010 mode of operation, if five transitions are counted before the max power up
timer reaches ten seconds, the Output relay contacts open and all monitoring functions
become active.
If the max power up timer reaches ten seconds, the Stop Timing output activates and a Watchdog
Timer fault is generated and the WDT ERROR indicator turns on.
2.4.2 MONITOR POWER FAILURE
The monitor responds to a Power Failure by entering a non-latching flash state. The monitor responds to a Power
Failure whether it is the result of over-current protection device operation, failure of the monitor power supply,
absence of proper operating AC Line voltage, or absence of proper operating AC Line frequency as defined below.
The AC+ input is considered to be ON if the voltage level is greater than 103VRMS AND the line frequency is
between 57.5 Hz and 62.5 Hz. It is considered to be OFF if the voltage level drops to less than 98VRMS or the line
frequency becomes less than 56.0 Hz or greater than 64.0 Hz. The hysteresis from the OFF state to the ON state or
vice versa is at least 3VRMS and the line frequency hysteresis is at least 1.0 Hz. If the factory option for Low AC
Power Thresholds is active, the AC+ input is considered to be ON if the voltage level is greater than 98VRMS and it
is considered to be OFF if the voltage level drops to less than 92VRMS.
The monitor responds to Power Failure as follows:
If the AC+ input is OFF for 400 milliseconds or less, the monitor continues to operate as though the
AC+ input had remained ON. The Fault relay contacts do not transfer to the fault condition during
this interval.
If the AC+ input is OFF for 450 milliseconds or more, the monitor transfers the Fault relay contacts to
the fault condition. The time interval from the start of the AC+ input being OFF and the transfer of
the Fault relay to the Fault state does not exceed 475 milliseconds. The relay maintains this state for
the duration of the Power Failure and will enter the Power Recovery mode when power returns.

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Power Failure lasting between 400 and 450 milliseconds may or may not cause the monitor to enter
the power failure state.
2.4.3 RESET
Activation of the front panel manual reset switch or the Reset input causes the Form C Output relay contacts to
transfer to the no fault condition. The monitor remains in the no fault condition only if no existing faults and all
input voltages are at the proper operating levels.
Each activation of the front panel manual reset switch or the Reset input causes a one-time reset input to the
monitor. A continuously activated front panel reset or Reset input will not prevent the monitor from monitoring
any fault conditions and/or transferring the Output relay contacts to the fault condition. The front panel reset or
Reset input must be removed and reapplied to activate a new reset input to the monitor. Activation of either reset
will cause all of the front panel LEDs to turn on for 300 milliseconds.
The only intended purpose of the reset input is to facilitate automated testing of the monitor.
2.4.4 COM PORT
The monitor has a front panel mounted DB-9, RS-232 communications port that can be used with Reno A&E’s
RaeComM software to view / modify configuration settings, view current status and voltages, view logs, and
download firmware upgrades. The COM port supports the standard baud rates from 300 to 57600 with one or two
stop bits and parity of odd, even, or none. The factory default is 57600, no parity, and one stop bit. The most
current version of the RaeComM software can be found on the Reno A&E web site www.editraffic.com/under
support / monitor support / software. Also see Application Note AN-002 for an introduction to the RaeComM
software. This application note can be found on the web site under support / monitor support / application notes.
The monitor was designed to use a standard DB-9 extension cable (male to female, straight through) for connecting
to a laptop or computer. This port does not support handshaking signals. See Section 3.4 for connector pin
assignments.
2.4.5 TEMPERATURE SENSOR
The monitor is capable of measuring the temperature inside of the cabinet. The temperature sensor is capable of
measuring temperatures in the range of -40°F to +214°F (-40°C to +101°C). The internal cabinet temperature is
included in the data logged into the Prior Faults Log when a fault occurs. If the actual temperature inside the
cabinet is below -40°F (-40°C) at the time the fault occurs, the temperature is logged as -40°F (-40°C). If the
actual temperature inside the cabinet is above +214°F (+101°C) at the time the fault occurs, the temperature is
logged as +214°F (+101°C).
2.4.6 REAL TIME CLOCK
The monitor has a Real Time Clock (RTC) that is used as a reference for all date and time stamped events that are
logged by the monitor. The Real Time Clock is initialized to local Pacific Standard Time when the unit is
undergoing final test. In addition, the Daylight Saving Time user option is set to Off.
The Real Time Clock is preprogrammed to recognize Leap Years and Daylight Saving Time events through the
year 2099. Currently, per U.S. Federal standards, Daylight Saving Time is observed in the United States from 2:00
A.M. on the second Sunday in March until 2:00 A.M. on the first Sunday in November.
The Real Time Clock setting can be modified through the use of the RaeComM software supplied with the
monitor. This information is input into the Real Time Clock via the COMM PORT serial connector on the front of
the monitor. Some controller manufacturers support our communications protocol and can synchronize the
monitor to the controller’s clock through a serial cable between the controller ant the monitor.
If there is no connection made to the monitor via the COMM PORT connector, the date / time information stored
in the internal Real Time Clock is used.
2.4.7 UP TIME ACCUMULATOR
The monitor has an Up Time Accumulator that keeps track of the total amount of time that the monitor has been
powered up since it was manufactured. It is saved in the format of Years, Months, Days, Hours, Minutes, and
Seconds. The monitor warranty coverage is valid for a total accumulated Monitor Up Time of two (2) years.
Tracking and recording the total time that the unit was in service provides an accurate means of validating any
potential warranty claims.
2.4.8 CONFIGURATION MONITORING (BEEPING MONITOR)
The monitor checks all configuration settings for changes once each second. If a change is found, an audible
buzzer will start beeping (if not disabled), the PC AJAR indicator will flash at a 1 Hz rate, and the monitor will
transfer to the fault state to indicate that a configuration setting has changed. If the change is undone, the beeping
will stop and the monitor must be reset to resume normal operations. No configuration changes are implemented

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 8of 41
until the front panel reset pushbutton is pressed and held for five (5) seconds. At that time five quick confirmation
beeps will be heard, the new settings will be implemented, the monitor will try to return to normal operation, and a
Configuration Change log entry made.
The following configuration settings are monitored: Channel Permissives, Yellow Disable jumpers, Program Card
type, printed circuit board DIP switches and jumpers, Factory Options, Electronic Options set through the
RaeComM software, and Watchdog Disable.
2.4.9 FACTORY SETTING
The monitor is configured at the factory during final test. Data set at the factory includes: Model Number, Serial
Number, Manufacture Date, Real Time Clock setting, Support for Flashing Greens, Fast Start-Up, Lower AC
Power Thresholds, LA DOT configuration, NYS DOT configuration, and support for a Diagnostic LCD. The Up
Time Accumulator is initialized to zero prior to final testing. Changes to any of the factory options are logged in
the configuration log.
2.4.10 USER UNIT INFORMATION
The monitor has non-volatile memory that can be used to store the following user unit information: 40 character
Location ID, 4 character Unit ID, and 5 character Agency ID. All of these IDs can consist of any alpha-numeric
characters. Upper and lower case characters can be used.
2.5 FAULT MONITORING
2.5.1 CONLFICT MONITORING
Configuration: The diodes removed on the Program Card determine permissive (non-conflicting) channels.
Removal of the diode labeled “2-6” would make Channels 2 and 6 permissive with each other. This is a two-way
relationship. If channel 2 is programmed as permissive with channel 6 then channel 6 is automatically permissive
with channel 2. The testing defaults for this feature are determined by the diodes removed on the program card.
Typically no diodes are removed during automated testing.
Test Preformed: While a channel has a Green or Yellow display active, the channel is tested to see if a non-
permissive channel has a Green or Yellow display active at the same time. If concurrently active conflicting
displays are detected a conflict timer is started. If the conflict goes away, the conflict timer is stopped (it is not
cleared) and a non-conflict timer is started. If the conflict reappears the non-conflict timer is reset to zero and the
conflict timer continues timing from its prior value. If the conflict timer reaches 333 milliseconds or more the
monitor will latch a conflict fault. If the non-conflict timer reaches 666 milliseconds the conflict timer is reset to
zero and the conflict is ignored. The normal voltage thresholds for this test are: Reds – ON when above 70VRMS
and OFF when below 50VRMS, Greens and Yellows – ON when above 25VRMS and OFF when below 15VRMS.
Fault Action: The monitor transfers the Output relay contacts to the fault condition, activates the Stop Time
output, and illuminates the CONFLICT indicator on the front panel. The Signal Sequence log and the Prior Faults
log will record this fault.
Resetting the Fault: The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
MC Coil (Relay Output, Side 2): If Flashing Don’t Walk Monitoring is enabled and channels have
been programmed as active channels, flashing don’t walk conflict testing will not be performed when
this input is below 50VRMS and will be performed when this input is above 70VRMS.
Feature Interactions:
Yellow Disable Jumpers: When Yellow Disable is jumpered for a channel that Yellow is removed
from all conflict testing.
Flashing Don’t Walk Monitoring: When Flashing Don’t Walk Monitoring is enabled and channels
have been programmed as active, a flashing red on a channel with this feature active will be included
in the displays checked for conflicts. A conflict with a flashing red must exist for 1500 milliseconds
to create a conflict fault.
Flashing Yellow Arrow Left Turns: When Flashing Yellow Arrow (FYA) Left Turns are enabled and
FYA Ignore Yellow Conflict is enabled and a Channel has an FYA checked as a child channel that
conflicts with this channel, a Yellow in that channel (if it is terminating a Flashing Yellow Arrow) and
a Yellow in the child channel being active at the same time will be ignored as a conflict. Also, if a
display is a Flashing Yellow Arrow it must flash. If it does not flash the monitor will remove the

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 9of 41
permissive with the programmed opposing channel thus causing a conflict with the Green or Yellow
of the opposing channel if they are on.
LED Thresholds: When LED Thresholds is enabled the monitor senses Greens, Yellows, and Reds as
ON when their voltage is above 25VRMS and OFF when below 15VRMS for the conflict test.
2.5.2 RED FAIL MONITORING
Configuration: All channels with a setting of “ON” for Red Fail switches will be monitored for the red fail fault.
The testing defaults for this feature are all channels enabled for red fail testing.
Test Preformed: When a channel has no displays active (Red, Yellow, or Green) a red fail timer is started. If a
display turns on for the channel the red fail timer is stopped (it is not cleared) and a non-red fail timer is started. If
the no active display condition returns the non-red fail timer is reset to zero and the red fail timer continues timing
from its prior value. If the red fail timer reaches 800 milliseconds or more the monitor will latch a red fail fault. If
the non-red fail timer reaches 300 milliseconds the red fail timer is reset to zero and the red fail is ignored. The
normal voltage thresholds for this test are: Reds – ON when above 70VRMS and OFF when below 50VRMS, Greens
and Yellows – ON when above 25VRMS and OFF when below 15VRMS.
Fault Action: The monitor transfers the Output relay contacts to the fault condition, activates the Stop Time
output, and illuminates the RED FAIL indicator on the front panel. The Signal Sequence log and the Prior Faults
log will record this fault.
Resetting the Fault: The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
Red Enable: All red fail testing will be disabled when this input is below 50VRMS and enabled when
this input is above 70VRMS.
MC Coil (Relay Output, Side 2): All red fail testing will be disabled when this input is below 50VRMS
and enabled when this input is above 70VRMS.
Special Function 1: When operating normally, all red fail testing will be disabled when this input is
below 50VRMS and enabled when this input is above 70VRMS. When inverted, all red fail testing will
be enabled when this input is below 50VRMS and disabled when this input is above 70VRMS.
Special Function 2: This input has no effect unless it is enabled through the RaeComM software.
When operating normally, all red fail testing will be disabled when this input is below 50VRMS and
enabled when this input is above 70VRMS. When inverted, all red fail testing will be enabled when this
input is below 50VRMS and disabled when this input is above 70VRMS.
Feature Interactions:
Red Enable Must Be Active (Option Jumper 3): When Red Enable Must Be Active is jumpered the
Red Enable input and at least one Red input must be active or a red fail fault will be generated.
Yellow Disable Jumpers: When Yellow Disable is jumpered for a channel that Yellow is removed
from red fail testing for that channel. If the Yellow is a child of a Flashing Yellow Arrow channel, the
Yellow will still be used in the parent channel’s red fail test regardless of the Yellow Disable jumper
setting of the child channel.
2010 Mode: When the 2010 mode of operation is enabled the timer thresholds are changed from 800
milliseconds to 1300 milliseconds for fault detection and the reset of the fault timer is still 300
milliseconds. NOTE: These times will be overridden by the Flashing Greens option if both features
are active.
LED Thresholds: When LED Thresholds is enabled the Greens, Yellows, and Reds are sensed as ON
when their voltage is above 70VRMS and OFF when below 50VRMS for the red fail test.
Flashing Greens (also known as Canadian Fast Flash): When Flashing Greens are enabled the timer
thresholds are changed from 800 milliseconds to 1500 milliseconds for fault detection and from 300
milliseconds to 200 milliseconds for the reset of the fault timer. NOTE: These times will override the
2010 Mode times if both features are active.
Flashing Yellow Arrow Left Turns: When Flashing Yellow Arrow (FYA) Left Turns are enabled and a
Channel has an FYA setting with a green border for one of its child channels (child channel is
permissive with the parent channel), then the Green of the child channel will be included in the red fail
test for that channel. If a Channel has an FYA setting with a yellow border for one of its child
channels, then the Yellow of the child channel will be included in the red fail test for that channel.

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 10 of 41
2.5.3 DUAL INDICATION MONITORING
Configuration: All channels with a setting of “ON” for Dual Enable switches will be monitored for the dual
indication fault. The testing defaults for this feature are all channels enabled for dual indication testing.
Test Preformed: The following dual indications are checked for: Yellow + Red, Green + Red, and Green +
Yellow. When a channel has multiple displays active a dual indication timer is started. If one of the indications
turns off the dual indication timer is stopped (it is not cleared) and a single indication timer is started. If both of the
indications turn off the dual indication timer is stopped (it is not cleared) and a no indication timer is started. If the
dual indication condition returns the single indication and no indication timers are stopped (not cleared) and the
dual indication timer continues timing from its prior value. If the dual indication timer reaches 400 milliseconds or
more the monitor will latch a dual indication fault. If the single indication timer reaches 1000 milliseconds the
dual indication timer, the single indication timer, and the no indication timer are reset to zero and the dual
indication is ignored. If the no indication timer reaches 300 milliseconds the dual indication timer, the single
indication timer, and the no indication timer are reset to zero and the dual indication is ignored. The normal
voltage thresholds for this test are: Reds – ON when above 70VRMS and OFF when below 50VRMS, Greens and
Yellows – ON when above 25VRMS and OFF when below 15VRMS.
Fault Action: The monitor transfers the Output relay contacts to the fault condition, activates the Stop Time
output, and illuminates the MULT IND indicator on the front panel. The Signal Sequence log and the Prior Faults
log will record this fault.
Resetting the Fault: The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
Red Enable: All dual indication testing will be disabled when this input is below 50VRMS and enabled
when this input is above 70VRMS. NOTE: The disable function will be overridden when the Multi
Indication & Short Yellow jumper is installed.
MC Coil (Relay Output, Side 2): All dual indication testing will be disabled when this input is below
50VRMS and enabled when this input is above 70VRMS. NOTE: The disable function will be
overridden when the Multi Indication & Short Yellow jumper is installed.
Feature Interactions:
Yellow Disable Jumpers: When Yellow Disable is jumpered for a channel that Yellow is removed
from dual indication testing for that channel. If the Yellow is a child of a Flashing Yellow Arrow
channel, the Yellow will still be used in the parent channel’s dual indication test regardless of the
Yellow Disable jumper setting of the child channel.
Flashing Greens (also known as Canadian Fast Flash): When Flashing Greens are enabled the no
indication timer thresholds for the Green + Red and Green + Yellow fault conditions are changed from
300 milliseconds to 100 milliseconds.
Flashing Yellow Arrow Left Turns: When Flashing Yellow Arrow (FYA) Left Turns are enabled and a
Channel has an FYA setting with a green border for one of its child channels (child channel is
permissive with the parent channel), then the Green of the child channel will be included in the dual
indication test for that channel. If a Channel has an FYA setting with a yellow border for one of its
child channels, then the Yellow of the child channel will be included in the dual indication test for that
channel. This will effectively add the following dual indication tests: Red + FYA, Yellow + FYA,
and Green + FYA. Also the timing thresholds are different for dual indications involving an FYA.
The dual indication timer threshold is 1500 milliseconds, single indication timer threshold is 1000
milliseconds, and the no indication timer threshold is 300 milliseconds. The Dual Enable setting of
the parent channel determines if the FYA display is tested. The Dual Enable setting for the permissive
child only affects the non-FYA displays of that channel.
LED Thresholds: When LED Thresholds is enabled the monitor senses Greens, Yellows, and Reds as
ON when their voltage is above 25VRMS and OFF when below 15VRMS for the dual indication test.
Multi Indication & Short Yellow Monitoring Jumper: When the Multi Indication & Short Yellow
jumper is installed the monitor performs the Dual Indication testing regardless of the state of the Red
Enable or MC Coil input.
2.5.4 SHORT YELLOW MONITORING
Configuration: Yellow Disable jumpers on the program card disable short Yellow monitoring for a channel.
Typically, pedestrian channels will have Yellow Disable jumpers installed. The testing defaults for this feature are
determined by the jumpers installed on the program card. Typically, no jumpers are installed during automated
testing.

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 11 of 41
Test Preformed: When a channel has a Green that turns off, a Yellow must follow it and it must stay on for at
least 2.7 seconds. When each Green turns off a 2.7 second timer is started. A Yellow must start within 1.5
seconds of the Green turning off. If the Red turns on before the Yellow, a short Yellow fault will be generated to
show that the Yellow was skipped. When a Yellow turns on for at least 100 milliseconds another 2.7 second timer
is started and must reach zero before the yellow turns off or a short Yellow fault will be generated. The normal
voltage thresholds for this test are: Reds – ON when above 70VRMS and OFF when below 50VRMS, Greens and
Yellows – ON when above 25VRMS and OFF when below 15VRMS.
Fault Action: The monitor transfers the Output relay contacts to the fault condition, activates the Stop Time
output, and illuminates the YELLOW indicator on the front panel. The Signal Sequence log and the Prior Faults
log will record this fault.
Resetting the Fault: The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
Red Enable: All short Yellow testing will be disabled when this input is below 50VRMS and enabled
when this input is above 70VRMS. NOTE: The disable function will be overridden when the Multi
Indication & Short Yellow jumper is installed.
MC Coil (Relay Output, Side 2): All short Yellow testing will be disabled when this input is below
50VRMS and enabled when this input is above 70VRMS.
Feature Interactions:
Yellow Disable Jumpers: When Yellow Disable is jumpered for a channel that Yellow is removed
from short Yellow testing. If the Yellow is a child of a Flashing Yellow Arrow channel, the Yellow
Disable jumper should be installed for the child channel.
LED Thresholds: When LED Thresholds is enabled the monitor senses Greens, Yellows, and Reds as
ON when their voltage is above 70VRMS and OFF when below 50VRMS for the short Yellow test.
Flashing Yellow Arrow Left Turns: When Flashing Yellow Arrow (FYA) Left Turns are enabled and a
Channel has an FYA setting with a green or yellow border for one of its child channels (child channel
is permissive with the parent channel), then the Yellow of the parent channel will be used for
terminating the Yellow or Green of the child channel and will be checked for short Yellow and
skipped Yellow.
Multi Indication & Short Yellow Monitoring Jumper: When the Multi Indication & Short Yellow
jumper is installed the monitor performs the short Yellow testing regardless of the state of the Red
Enable input.
2.5.5 SHORT CLEARANCE MONITORING
Configuration: Short clearance monitoring is performed on all channels.
Test Preformed: When a channel has a Green that turns off, a conflicting channel cannot display a Green or
Yellow for at least 2.7 seconds. When each Green turns off a 2.7 second timer is started. If a conflicting Green or
Yellow turns on for at least 100 milliseconds the 2.7 second timer must have reached zero or a fault will be
generated. The normal voltage thresholds for this test are: Greens and Yellows – ON when above 25VRMS and
OFF when below 15VRMS.
Fault Action: The monitor transfers the Output relay contacts to the fault condition, activates the Stop Time
output, and illuminates the YELLOW indicator on the front panel. The Signal Sequence log and the Prior Faults
log will record this fault.
Resetting the Fault: The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
Red Enable: All short clearance testing will be disabled when this input is below 50VRMS and enabled
when this input is above 70VRMS. NOTE: The disable function will be overridden when the Multi
Indication & Short Yellow jumper is installed.
MC Coil (Relay Output, Side 2): All short clearance testing will be disabled when this input is below
50VRMS and enabled when this input is above 70VRMS.
Feature Interactions:

889-3809-00 Model 2018 Operations Manual Rev Apr 2020 Page 12 of 41
Yellow Disable Jumpers: When Yellow Disable is jumpered for a channel that Yellow is removed
from short clearance testing when looking for conflicting displays.
LED Thresholds: When LED Thresholds is enabled the monitor senses Greens and Yellows as ON
when their voltage is above 70VRMS and OFF when below 50VRMS for the short Yellow test.
Flashing Yellow Arrow Left Turns: When Flashing Yellow Arrow (FYA) Left Turns are enabled and a
Channel has an FYA setting with a green or yellow border for one of its child channels (child channel
is permissive with the parent channel), then that child, whether green or yellow, will be checked for
short clearance.
Multi Indication & Short Yellow Monitoring Jumper: When the Multi Indication & Short Yellow
jumper is installed the monitor performs the short clearance testing regardless of the state of the Red
Enable input.
2.5.6 +24 VOLTS DC MONITORING
Configuration: +24VDC monitoring is always performed.
Test Preformed: A voltage greater than +22VDC applied to the +24 Volt input is recognized as adequate for proper
operation. A voltage of less than +18VDC is recognized as inadequate for proper operation. When the +24 Volt
input is detected as inadequate for more than 350 milliseconds, the monitor generates a fault. A +24V failure
during the power up or power recovery sequence shall not cause a fault.
Fault Action: The monitor transfers the Output relay contacts to the fault condition, activates the Stop Time
output, and illuminates the VDC FAILED indicator on the front panel. The Signal Sequence log and the Prior
Faults log will record this fault.
Resetting the Fault: The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
None
Feature Interactions:
+24VDC Enhanced Monitoring: When enabled, high voltage monitoring and ripple monitoring will
be performed on the +24VDC input as well as the low voltage monitoring.
2.5.7 WATCHDOG MONITORING
Configuration: The setting of Watchdog switch determines if this feature is active. The testing default for this
feature should be enabled.
NOTE: The Model 2018 monitor can be factory configured without the Watchdog switch. If the switch is not
present, the monitor will operate with the Watchdog monitoring function permanently enabled.
Test Preformed: The Watchdog Timer input (Rear Edge Connector - Pin 22) is monitored. A voltage of less than
4VDC is recognized as a low and a voltage greater than 12VDC is recognized as a high. The input must change
states at least once every 1500 milliseconds or the monitor generates a fault. Testing is disabled if the line voltage
drops below 98VRMS and enabled when the line voltage goes above 103VRMS.
Fault Action: The monitor transfers the Output relay contacts to the fault condition, activates the Stop Time
output, and flashes the WDT ERROR indicator on the front panel. The Signal Sequence log and the Prior Faults
log will record this fault.
Resetting the Fault: The monitor remains in this fault condition until the unit is reset by the activation of the front
panel reset pushbutton or the activation of the reset input. Power loss or power interruption will not reset this fault.
The Reset log will record the resetting of this fault.
Modifying Inputs:
None
Feature Interactions:
2010 Mode: When the 2010 mode of operation is enabled the timer threshold is changed from 1500
milliseconds to 1000 milliseconds for fault detection.
Force Watchdog to 1500 Milliseconds: When the 2010 mode of operation is enabled the timer
threshold is forced to stay at 1500 milliseconds for fault detection.