EDI 210 Series Manuale utente

THIS MANUAL CONTAINS TECHNICAL INFORMATION FOR THE MODEL 210; PCB Issue G.

INCLUDED ARE GENERAL DESCRIPTION, OPERATIONAL DESCRIPTION, INSTALLATION,

AND SPECIFICATIONS.

THE 210 SERIES SIGNAL MONITOR UNIT IS DESIGNED AND MANUFACTURED

IN THE USA BY EBERLE DESIGN INC., PHOENIX, ARIZONA, AN ISO 9001:2008 REGISTERED

COMPANY. 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.

REVISION: SEPTEMBER 2014

pn 888-0210-003C

Serial Number

CALTRANS

MODEL 210 SERIES

RMS Signal Monitor

Operations Manual

MAINTENANCE NOTE

EBERLE DESIGN INC. SIGNAL MONITORS HAVE BEEN CAREFULLY INSPECTED

AND TESTED TO ENSURE PROPER OPERATION. IT IS RECOMMENDED THAT THE

SIGNAL MONITOR BE TESTED AT LEAST ANNUALLY TO ENSURE COMPLIANCE

WITH THE PROPER SPECIFICATIONS.

- WARNING -

PIN 27 OF THE MAIN CONNECTOR (P6) PROVIDES THE CLOSED CONTACT OF

THE OUTPUT RELAY WHEN THE MONITOR IS IN THE NO-FAULT STATE. WHEN

THE MONITOR IS IN THE NO-FAULT STATE AND THE AUTO/FLASH SWITCH IS

IN THE FLASH POSITION, AC LINE VOLTAGE MAY BE PRESENT ON PIN 27.

THIS PIN WAS PREVIOUSLY DEFINED AS A “NO-CONNECT’ PIN IN LEGACY

EQUIPMENT. TO PREVENT POTENTIAL EXPOSURE TO ELECTRICAL SHOCK,

BEFORE INSTALLING THIS MONITOR THE USER IS CAUTIONED TO CHECK

THAT THE CABINET WIRING IS COMPATIBLE WITH THE USE OF THIS PIN AS A

SOURCE OF AC LINE VOLTAGE.

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 TABLE OF CONTENTS 
 
Section 1 GLOSSARY ........................................................................................................... 1 
Section 2 GENERAL DESCRIPTION..................................................................................... 2 
1 Basic Functions.....................................................................................................2 
1.1 Conflict Monitoring .........................................................................................2 
1.2 24VDC Monitoring..........................................................................................2 
1.3 Controller Watchdog Monitoring (WDT Error)................................................2 
Section 3 GENERAL CHARACTERISTICS........................................................................... 3 
1 Hardware Features................................................................................................3 
2 AC Line Brown-out Detection................................................................................3 
3 Non-Volatile Fault Memory....................................................................................3 
4 PCA (Program Card Absent) Indication.................................................................3 
5 Internal MPU Watchdog........................................................................................3 
6 Reset Input Detection............................................................................................4 
7 LED Test...............................................................................................................4 
8 Memory Test .........................................................................................................4 
9 Watchdog Monitoring Disabled Indicator...............................................................4 
10 Diagnostic Display Mode.....................................................................................4 
10.1 No-Fault Diagnostic Display.........................................................................4 
10.2 Fault Diagnostic Display...............................................................................5 
Section 4 INSTALLATION ..................................................................................................... 6 
1 Program Card Programming .................................................................................6 
2 Watchdog Programming........................................................................................6 
2.1 Watchdog Enable Switch...............................................................................6 
Section 5 FRONT PANEL DESCRIPTION............................................................................. 7 
1 Indicators...............................................................................................................7 
1.1 (G) AC POWER Indicator...............................................................................7 
1.2 (Y) VDC FAILED Indicator .............................................................................7 
1.3 WDT ERROR Indicator..................................................................................7 
1.4 CONFLICT Indicator ......................................................................................7 
1.5 PCA Indicator.................................................................................................7 
1.6 DIAGNOSTIC Indicator..................................................................................7 
1.7 CHANNEL STATUS Indicators......................................................................7 
2 Front Panel Controls .............................................................................................8 
2.1 RESET Button................................................................................................8 
Section 6 THEORY OF OPERATION .................................................................................... 9 
1 Introduction ...........................................................................................................9 
2 Main MPU Logic....................................................................................................9 
3 Serial Peripheral Interface (SPI)............................................................................9 
4 Internal MPU Watchdog........................................................................................9 
5 EEprom Memory ...................................................................................................9 
6 24Vdc Logic Inputs..............................................................................................10 

7 Display ................................................................................................................10 
8 Program Card and Switch Inputs.........................................................................10 
9 RMS-Engine........................................................................................................10 
10 Power Supply....................................................................................................10 
Section 7 MAINTENANCE................................................................................................... 11 
1 Trouble Shooting.................................................................................................11 
Section 8 SPECIFICATIONS................................................................................................ 13 
1 Electrical..............................................................................................................13 
1.1 Power Requirements....................................................................................13 
1.2 AC Voltage Monitors....................................................................................13 
1.3 DC Voltage Monitors....................................................................................13 
2 Timing Functions.................................................................................................13 
3 Mechanical..........................................................................................................13 
4 Environmental .....................................................................................................14 
Section 9 WIRING ASSIGNMENTS..................................................................................... 15 
1 Monitor Unit Connector (P6)................................................................................15 
2 Program Card Connector (P4) ............................................................................16 
3 Program Card Diagram.......................................................................................17 
Section 10 PARTS LIST....................................................................................................... 19 
Section 11 SCHEMATICS.................................................................................................... 23 
Section 12 ASSEMBLY DRAWING ..................................................................................... 32 
 

210 SERIES SIGNAL MONITOR

OPERATIONS MANUAL

Eberle Design Inc. Page 1

Section 1

GLOSSARY

A - Ampere

oC - Celsius

Component - Any electrical or electronic device

DC - Direct Current

DIP –Dual Inline Package

Firmware - A computer program or software stored permanently in PROM

FLASH –An IC Memory with nonvolatile, electrically erasable, programmable features

Hz - Hertz

IC - Integrated Circuit

Jumper - A means of connecting/disconnecting two or more conductive by soldering/desoldering a

conductive wire or by PCB post jumper

LED - Light Emitting Diode

LOGIC - Negative Logic Convention (Ground True) State

mA - milliAmpere

uH - microHenry

ms - millisecond

MCU - Micro Controller Unit

N.C. - Normally closed contact

N.O. - Normally open contact

PCB - Printed Circuit Board

RAM - Random Access Memory

RMS - Root-Mean-Square

ROM - Read Only Memory Device

s –second

Schmidtt Circuit –a circuit that provides hysterisis in the threshold

SW –Switch

uF - microfarad

VAC - Voltage Alternating Current

VDC - Voltage Direct Current

VRMS - Voltage Root Mean Square

210 SERIES SIGNAL MONITOR

OPERATIONS MANUAL

Eberle Design Inc. Page 2

Section 2

GENERAL DESCRIPTION

2.1 BASIC FUNCTIONS

The Signal Monitor is a device used in a traffic controller assembly to monitor traffic signals at an

intersection for conflicting proceed indications caused by malfunctions of the controller, load switches,

field wiring and loads, or miss-wiring of the cabinet. The Signal Monitor also provides error sensing of

the cabinet 24VDC supply and monitors the controller Watchdog output. The Signal Monitor is directly

interchangeable with a standard model 210 Signal Monitor and complies with all specifications outlined

in Chapter 4 (Model 210 Monitor Specifications) of the Caltrans Traffic Signal Control Equipment

Specifications (January 1989) and TEES March 12,2009.

When triggered by the detection of a fault condition which exists longer than the minimum period, the

Signal Monitor will enter the fault mode causing the Output relay contacts to close and enabling the

Stop-Time output to the controller. The cabinet assembly should be wired such that the closure of the

Output relay contacts will cause an automaticswitching of the field signal outputsfrom normal operation

to flashing operation. The Signal Monitor will then display the appropriate fault indications and will

remain in this fault mode until a reset command is issued.

2.1.1 CONFLICT MONITORING

The Signal Monitor is capable of monitoring 16 channels. Each channel consists of a Green and Yellow

field signal input. A Program Card is provided for assigning conflicting channels and inhibiting Yellow

monitoring for required channels. The Signal Monitor detects the presence of conflicting Green or

Yellow signals on the AC field terminations between any two or more channels assigned to conflict on

the Program Card. The monitoring circuitry is capable of detecting either full wave or positive and

negative half-wave field signal outputs at the specified voltage levels.

2.1.2 24VDC MONITORING

Sensing of the cabinet 24VDC supply is provided as specified in Section 4.2, Chapter 4 of the Caltrans

Traffic Signal Control Equipment Specifications. When the 24VDC input falls below the specified

voltage levels the Signal Monitor will enter the fault mode causing the Output relay contacts to close

and enabling the Stop-Time output to the controller. See Section 8.1.3.

2.1.3 CONTROLLER WATCHDOG MONITORING (WDT ERROR)

Sensing of the controller Watchdog output is provided as specified in Section 4.3 of the Caltrans Traffic

Signal Control Equipment Specifications. When a logic transition is not sensed for the specified period

(see Section 8.2) the Signal Monitor will enter the fault mode causing the Output relay contacts to close

and enabling the Stop-Time output to the controller.

An AC Line brownout condition will reset the WDT ERROR fault mode when the AC Line is restored.

The WDT Error indicator will remain illuminated until a Reset command is issued via the front panel

RESET button or External Reset input. This indicates to the technician that a WDT Error occurred but

was cleared by an AC Line brownout.

210 SERIES SIGNAL MONITOR

OPERATIONS MANUAL

Eberle Design Inc. Page 3

Section 3

GENERAL CHARACTERISTICS

3.1 HARDWARE FEATURES

The 210 series Signal Monitor is a dual microprocessor based unit. Since all critical timing functions

are accomplished by the microprocessor, the quartz crystal based accuracy results in very precise and

repeatable measurements. This accuracy is maintained on functions from timing fault conditions to

implementing a unique firmware based digital sampling and filtering algorithm. This algorithm is applied

to all AC field signals to help eliminate false detection in a "noisy" AC line environment.

Input voltages are measured using a true Root Mean Squared (RMS) technique. A dedicated

microprocessor RMS-Engine controls the analog to digital (A/D) hardware which samples each AC

input voltage 32 times per cycle. The RMS-Engine then calculates the true RMS voltage value

producing accurate results which are very insensitive to changes in frequency, phase, wave shape,

and distortion.

A nonvolatile EEPROM device is utilized to retain fault status information in the event of an AC Line

power interruption. The correct fault indications will be displayed upon restoration of AC Line power.

This EEPROM device requires no battery back-up.

3.2 AC LINE BROWN-OUT DETECTION

When the AC Line voltage is below the "drop-out" level the Signal Monitor will suspend all fault

monitoring functions, close the Output relay contacts, and enable theStop-Time output to the controller.

The AC POWER indicator on the front panel will flash at a rate of 2Hz to indicate the brown-out status.

When the AC Line voltage returns above the "restore" level the monitor will resume normal operation

and the AC POWER indicator on the front panel will remain illuminated.

3.3 NON-VOLATILE FAULT MEMORY

The Signal Monitor stores the fault and channel indicator status at the time the fault occurs into a non-

volatile EEPROM device. Should an AC Line power interruption occur while the monitor is in the fault

mode, then upon restoration of AC Line power, the Output relay and Stop-Time output will remain in

the fault mode and the correct fault and channel indicators will be displayed.

3.4 PCA (PROGRAM CARD ABSENT) INDICATION

If the Program Card is absent or not seated properly in the edge connector, the Signal Monitor will enter

the fault mode causing the Output relay contacts to close and enabling the Stop-Time output to the

controller. The PCA indicator will illuminate to indicate this condition. A manual or external Reset is

required after the Program Card is properly seated.

3.5 INTERNAL MPU WATCHDOG

The Signal Monitor generates an internal watchdog pulse from its microprocessor. This occurs at least

once per cycle. If the internal hardware does not detect a watchdog pulse within approximately 325

milliseconds, the Signal Monitor will enter the fault mode causing the Output relay contacts to close

and enabling the Stop-Time output to the controller. The DIAGNOSTIC indicator on the front panel will

illuminate to indicate a monitor hardware and/or firmware failure. This type of failure is configured as

210 SERIES SIGNAL MONITOR

OPERATIONS MANUAL

Eberle Design Inc. Page 4

latching. With latching operation, only a loss of AC Line will restore operation. If the microprocessor

resumes operation the unit will not return to normal operation.

3.6 RESET INPUT DETECTION

A reset command from either the front panel Reset button or External Reset input will cause a one-time

reset command to the monitor. If the reset command is maintained longer than 500 milliseconds, the

monitor will resume monitoring functions and the Reset command will then provide input to the

Diagnostic Display mode (see Section 3.10).

3.7 LED TEST

The monitor will illuminate all front panel indicators for 500 milliseconds when a Reset command is

issued by the front panel Reset button or External Reset Input. This function provides a means to verify

the operation of all front panel indicators.

3.8 MEMORY TEST

The Signal Monitor verifies the proper operation of the memory devices (RAM, EPROM, & EEPROM)

required to operate the monitor. This test is performed when AC Line power is applied, a Reset

Command is issued to the monitor, and periodically during operation. If a memory error is detected, the

Signal Monitor will attempt to update the front panel display and then execute a STOP instruction. This

will cause the Output relay contacts to close and enable the Stop-Time output to the controller. The

DIAGNOSTIC indicator on the front panel will illuminate to indicate a monitor hardware and/or firmware

failure. Due to the nature of these hardware or firmware failures, other fault indicators that may be

concurrently illuminated may not be valid for trouble shooting purposes.

3.9 WATCHDOG MONITORING DISABLED INDICATOR

When the WDT ENABLE switch is in the OFF position to disable Watchdog Monitoring of the cabinet

Controller, or the AC Line voltage is below the Watchdog disable level, the Signal Monitor will flash the

WDT ERROR indicator on the front panel once every 2 seconds. This function informs the service

technician that the cabinet Controller Watchdog monitoring function is disabled.

3.10 DIAGNOSTIC DISPLAY MODE

The Signal Monitor provides two means of displaying the individual Green and Yellow field status. The

No Fault Diagnostic Display mode shows the individual colors while the monitor is not in the fault mode

(intersection operating). The Fault Diagnostic Display mode shows the individual colors that were active

at the time the monitor triggered to the fault mode (intersection in flash). The Fault Diagnostic Display

mode also provides a review of previous fault events.

3.10.1 NO-FAULT DIAGNOSTIC DISPLAY

When the Signal Monitor is not in the fault state, the unit can display the active Green and Yellow field

status individually. To enter this display mode depress and hold the Reset button. Each time the Reset

button is activated and held, the next set of colors will be displayed on the channel status indicators.

The display will continue to show the selected color as long as the Reset button is activated. This mode

only affects the monitor display and normal fault processing will continue to occur. The sequence is as

follows: Reset Fault Status LEDs Channel Status LEDs

#1 (G) AC POWER LED flashes Green field status 1-16

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