TWR Lighting E-1DB User manual

C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
4300 WINDFERN RD., SUITE 100 HOUSTON, TX 77041-8943
VOICE [phone] FAX [phone]
WEB: www.twrlighting.com
IMPORTANT!!!!
PLEASE TAKE THE TIME TO FILL OUT THE FORM COMPLETELY. FILE
IN A SAFE PLACE. IN THE EVENT YOU EXPERIENCE PROBLEMS WITH
OR HAVE QUESTIONS CONCERNING YOUR CONTROLLER, THE
FOLLOWING INFORMATION IS NECESSARY TO OBTAIN PROPER
SERVICE AND PARTS.
MODEL # ________E-1DB
SERIAL #
PURCHASE DATE
PURCHASED FROM

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
TABLE OF CONTENTS
1.0 INTRODUCTION...............................................................................................................1
1.1 APPLICATION.......................................................................................................1
1.2 SPECIFICATIONS OF EQUIPMENT....................................................................1
2.0 INSTALLATION ................................................................................................................2
2.1 POWER SUPPLY CONTROL CABINET MOUNTING..........................................2
2.2 PHOTOCELL HOUSING.......................................................................................2
2.3 PHOTOCELL WIRING ..........................................................................................2
2.4 POWER WIRING...................................................................................................3
2.5 TOWER LIGHTING KIT.........................................................................................3
2.5.1 Beacon Mounting and Wiring..................................................................4
2.5.2 Lighting Kit Wiring...................................................................................5
2.6 ALARM WIRING....................................................................................................6
2.6.1 White Strobe Failure (SF)……………………………………………………..6
2.6.2 Red Strobe Failure (RF) .........................................................................6
2.6.3 Power Failure (PF)..................................................................................6
2.6.4 Photocell (PC).........................................................................................6
2.6.5 Sidelight Alarm (SA) ...............................................................................7
2.7 ALARM TESTING..................................................................................................7
2.7.1 White Strobe Failure (SF).......................................................................7
2.7.2 Red Strobe Failure (RF) .........................................................................7
2.7.3 Power Failure (PF)..................................................................................7
2.7.4 Photocell (PC).........................................................................................7
2.7.5 Sidelight Alarm (SA) ...............................................................................7
2.8 CONTROLLER CONFIGURATION.......................................................................8
3.0 THEORY OF OPERATION...............................................................................................9
3.1 THE POWER SUPPLY..........................................................................................9
3.2 THE FLASHTUBE.................................................................................................9
3.3 TIMING CIRCUIT ................................................................................................10
3.4 TRIGGER CIRCUIT.............................................................................................10
3.5 ALARM CIRCUITS..............................................................................................10
3.5.1 White Strobe Failure (SF).....................................................................10
3.5.2 Red Strobe Failure (RF) .......................................................................10
3.5.3 Power Failure (PF)................................................................................10
3.5.4 Photocell (PC).......................................................................................11

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
3.5.5 Sidelight Alarm (SA) .............................................................................11
3.6 BLEEDER CIRCUIT............................................................................................11
3.7 STROBE DIAGNOSTIC CIRCUITS ....................................................................11
3.7.1 Control Power On.................................................................................11
3.7.2 High Voltage.........................................................................................12
3.7.3 Trigger Voltage.....................................................................................12
3.7.4 Nightmode ............................................................................................12
3.7.5 Primary Timing......................................................................................12
3.7.6 Timing Signal Verify..............................................................................15
3.7.7 Flash Verified........................................................................................12
3.7.8 Strobe Fail Test ....................................................................................13
4.0 TROUBLE SHOOTING...................................................................................................14
4.1 TOOL REQUIREMENTS.....................................................................................14
4.2 DIAGNOSTIC EVALUATION ..............................................................................14
4.3 TROUBLE SHOOTING ASSISTANCE................................................................14
4.3.1 Flash Verify LED - Out..........................................................................14
4.3.2 Control Power on LED - Out.................................................................15
4.3.3 Primary Timing LED - Out.....................................................................15
4.3.4 False or Nonexistent Beacon Alarm (SF).............................................15
4.3.5 False or Nonexistent Beacon Alarm (RF).............................................15
4.3.6 No Red Strobe Operation.....................................................................16
5.0 MAINTENANCE GUIDE..................................................................................................17
5.1 FLASHTUBE REPLACEMENT ...........................................................................17
5.2 RED OBSTRUCTION LIGHTING........................................................................18
5.2.1 LAMP REPLACEMENT........................................................................18
5.3 POWER SUPPLY................................................................................................18
5.4 PHOTOCELL.......................................................................................................19
6.0 MAJOR COMPONENTS LIST ........................................................................................20
7.0 SUGGESTED SPARE PARTS LIST...............................................................................23
WARRANTY & RETURN POLICY
RETURN MERCHANDISE AUTHORIZATION FORM (RMA)

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
APPENDIX
CHASSIS LAYOUT..............................................................................................H40-269
WIRING DIAGRAM............................................................................................ MO1-269
HOUSING DETAIL.............................................................................................HDO-269
INSTALLATION GUIDELINE ...............................................................................INS-269
PHOTOCELL HOUSING DETAIL ......................................................................... 100239
TOWER LIGHTING KIT 201’ TO 350’ CABLE............................................................600
SIDELIGHT MOUNT ASSEMBLY......................................................................... 100489
TOWER LIGHTING KIT 201’ TO 350’ CONDUIT/CABLE......................................600-01
OL-1 LIGHT LEVEL DETAIL................................................................................. 100188
TIMING/CONTROL PCB......................................................................................H01-269
HIGH VOLTAGE RECTIFIER PCB...................................................................H02-226A
RELAY PCB.........................................................................................................H03-269
TRIGGER VOLTAGE RECTIFIER PCB...............................................................H04-269
L-810 OL-1 SINGLE OBSTRUCTION LIGHT ....................................................FM10018
L-810 OL-1 SINGLE OBSTRUCTION LIGHT DETAIL.......................................... 279-OL
L-810-OL-1 SINGLE OBSTRUCTION WIRING DETAIL..........................................274-S
JUNCTION BOX DETAIL...................................................................................... 100089
STDBEACON ASSEMBLY.................................................................................... 100414

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
1
1.0 INTRODUCTION
TWR Lighting Division Model E-1DB Type L-864/L-865 Controller has been designed and
built to the Federal Aviation Advisory Circular 150/5345-43E, with safety and reliability in
mind. TWR is committed to providing our customers with some of the best products and
services available. TWR welcomes you to our family of fine products and we look forward to
servicing your needs now and in the future.
1.1 APPLICATION
The E-1DB Controller is for use on lighting structures or towers (201' to 350' AGL)
that are approved to be lighted with Dual White/Red Flashing Medium Intensity
Strobes in accordance with the Federal Aviation Administration's (FAA) Advisory
Circular 70/7460-1K.
1.2 SPECIFICATIONS OF EQUIPMENT
Dimensions:
Controller (H X W X D) / Weight 30.50" X 20.0" X 8.0" / 95.0 lbs
Mounting Dim (H X W) 31.25" X 14.0"
Beacon Height / Weight 28.0" / 36 lbs
Cable Diameter / Weight per 100 ft. .625" +/- 10% 24 lbs
Electrical Voltage: 120V AC +/- 10% 60 Hz (Standard)
240V AC +/- 10% 60 Hz (Available)
Intensity:
White Daymode 20,000 +/- 25% Effective Candelas
Red Nightmode 2,000 +/- 25% Effective Candelas
White Nightmode (Back-up mode) 2,000 +/- 25% Effective Candelas
Beam Spread:
Horizontal 360°
Vertical 3°Minimum
Flash Rate:
White Daymode 40 fpm +/- 2 fpm
Red Nightmode 22 fpm +/- 2 fpm
White Nightmode (Back-up mode) 40 fpm +/- 2 fpm
Wattage:
Daymode 95 Watts
Red Nightmode 310 Watts
White Nightmode 35 Watts
Temperature: +55°C / -55°C
Beacon Wind Load: 2.1 ft2

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
2
2.0 INSTALLATION
WARNING DANGER!!!
THIS SYSTEM OPERATES AT HIGH VOLTAGE LEVELS THAT COULD BE LETHAL TO
SERVICE PERSONNEL. ALL INSTALLATION AND MAINTENANCE WORK SHOULD
BE DONE BY QUALIFIED SERVICE PERSONNEL ONLY. WHEN PERSONNEL IS
INSTALLING SYSTEM OR PERFORMING MAINTENANCE ON THIS SYSTEM, MAKE
SURE THE POWER IS TURNED OFF AT THE SERVICE BREAKER PANEL!!
READ AND UNDERSTAND THE THEORY OF OPERATION AND ITS SAFETY
MESSAGES BEFORE ATTEMPTING INSTALLATION/MAINTENANCE OF THIS
SYSTEM. DO NOT ATTEMPT TO DEFEAT THE INTERNAL SAFETY SWITCHES IN THE
CONTROLLER AND BEACON!!
2.1 POWER SUPPLY CONTROL CABINET MOUNTING
The power supply control cabinet can be locatedat thebase ofthe structureor in an
equipment building. Mounting Dimensions can be found in Section 1.2 on page 1.
Pay particular attention when choosing your controller mounting location to ensure
proper door opening and room for service personnel. Refer to installation drawings
INS-269 and HDO-269 for ease of install.
2.2 PHOTOCELL HOUSING
The standard photocell housing is supplied witha 20' pigtail of 16 AWG TYPE TFFN
wire. On occasion in mounting of the photocell an additional amount of wire may be
required. Refer to drawing 100239 for proper assistance on determining gauge of
wire for your specific needs.
2.3 PHOTOCELL WIRING (Refer to Drawings HDO-269 and H40-269)
If the control cabinet is mounted inside an equipment building, the photocellshould
be mounted vertically on ½” conduit outside the building above the eaves facing
north. Wiringfromthephotocellhousingsockettothecontrolcabinetshouldconsist
of one (1) each; red, black, and white wires. The white wire is connected to the
socket terminal marked "COM," the black wire is connected to the socket terminal
marked "B," and the red wire is connectedto the socket terminalmarked"R." These
socket connections are made by using .25" quick connect terminals, which must be
crimped to the wires. The photocell should be positioned so that it does not "see"
ambient light, which would prevent it from switching to the nightmode. If the control
cabinet is mounted outside an equipment building,the photocell should be mounted
vertically on ½” conduit so the photocell is above the control cabinet. Care must be
taken to assure that the photocell does not "see" any ambient light that would

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
3
prevent it from switching into the nightmode. The photocell housing socketwiring is
the same as above.
2.3.1 Connect the BLACK wire from the photocell to TB1-8.
2.3.2 Connect the RED wire from the photocell to TB1-9.
2.3.3 Connect the WHITE wire from the photocell to TB1-10.
2.3.4 Install the photocell into the receptacle and twist to the right while depressing
to lock into place.
2.4 POWER WIRING (Refer to Drawing H40-269)
Power wiring to the control cabinet should be in accordance with local methods and
the National Electric Code (NEC).
2.4.1 A 15 amp circuit breaker is recommended at service panel.
2.4.2 Connect the "HOT" side of the 120V AC line to TB1-11.
2.4.3 Connect the "NEUTRAL" side of the 120V AC line to TB1-12.
2.4.4 Connect the AC ground to the ground stud to the lower right of the terminal
block TB1.
2.4.5 Controller panel should be connected tothetowerand/orbuildinggrounding
system with the exception of installations on AM RF Applications where
controllergroundingtoearthgroundisprohibited. Groundthecontrolleronly
to the tower itself using a suitable RF ground.
2.5 TOWER LIGHTING KIT
When installing this system, the customer will need to use strobe cable wiring
method to wire the strobe beacon. Refer to Lighting Kit Drawing 600-01 and 600 for
cable installations.

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
4
WARNING DANGER!!!
THIS SYSTEM OPERATES AT HIGH VOLTAGE LEVELS THAT COULD BE
LETHAL TO SERVICE PERSONNEL. ALL INSTALLATION AND MAINTENANCE
WORK SHOULD BE DONE BY QUALIFIED SERVICE PERSONNEL ONLY.
WHEN PERSONNEL IS INSTALLING SYSTEM OR PERFORMING
MAINTENANCE ON THIS SYSTEM, MAKE SURE THE POWER IS TURNED OFF
AT THE SERVICE BREAKER PANEL!!
READ AND UNDERSTAND THE THEORY OF OPERATION AND ITS SAFETY
MESSAGES BEFORE ATTEMPTING INSTALLATION/MAINTENANCE OF THIS
SYSTEM. DO NOT ATTEMPT TO DEFEAT THE INTERNAL SAFETY SWITCHES
IN THE CONTROLLER AND BEACON!!
2.5.1 Beacon Mounting and Wiring (Refer to Drawings HDO-269 and INS-269)
2.5.1.1 Bolt the beacon to the mounting plate using four 5/8" X 1 1/4"
galvanized bolts that are supplied. Installer should make sure to
check for full thread engagement on Anco locknut. Allow 16"
clearance in back of the hinge (25" from the center of the base)to
tilt lens back without hitting an obstruction.
2.5.1.2 Level the beacon using the spirit level at the base of the lens.
Shims may be used under beacon base or triple nutting each bolt
with palnuts on all four (4) nuts.
2.5.1.3 Slip the electrical cable for the dual beaconthrough the watertight
connector (cable gland bushing), and tighten the gland nut to
make a watertight seal. Attach the wires to the terminal strip as
follows:
Connect Cable To Lamp platform Terminal
Wire Color Match Wire Color Block
Number
10 Gauge Black 20 Gauge Black 5
10 Gauge Red/Black 12 Gauge Red 3
10 Gauge Red 12 Gauge Red/Black 2
14 Gauge White 20 Gauge White 6
14 Gauge White/Green 20 Gauge White/Green 7
14 Gauge Green 20 Gauge Green 4
16 Gauge Blue 20 Gauge Blue 8
16 Gauge Brown 20 Gauge Brown 9
16 Gauge Bare Wire Beacon Base

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
5
2.5.2 Lighting Kit Wiring
Install wiring between the controller to the beacon utilizing strobe cable
method. (TWR LIGHTING CANNOT WARRANTY SYSTEMS THAT
EMPLOY SPLICING CABLE.) Refer to drawings HDO-269, 600 and
600-01forinstall of light kits. Followingtheseminimumguidelinesas well as
any local or end user additional requirements, installing light kits will require
lifting of the cable by the supplied cable grip or conduit to affix to the tower.
Always work safely and adhere to all OSHA Safety Guidelines when lifting
wiring or working on the structure or tower itself. It is the installer’s
responsibility to install the lighting kit in a safe manner. Installers can
request from OSHA their requirements 29CFT 1926.21 and 29CFR
1926.105 to ensure compliance to regulations.
NOTE: On occasion, a set of custom lighting kit drawings may be
specifically requested by a customer and installed in this manual. In cases
such as this, the drawings will proceed the manual if a conflict occurs.
All the necessary information for wiring the dual beacon and sidelights is
contained on the tower kit drawings 600 and 600-01. The connections for
the dual beacon and sidelights in the controller are as follows:
2.5.2.1 Connect the 10 gauge Red/Black wire from beacon wiring to
TB1-1.
2.5.2.2 Connect the 10 gauge Red wire from beacon wiring to TB1-2.
2.5.2.3 Connect the 10 gauge Black wire from beacon wiring to
TB1-3.
2.5.2.4 Connect the 14 gauge White wire from beacon wiring to
TB1-4.
2.5.2.5 Connect the 14 gauge White/Green wire from beacon wiring to
TB1-5.
2.5.2.6 Connect the 14 gauge Green wire from beacon wiring to the

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
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12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
6
ground screw left of TB1.
2.5.2.7 Connect the 16 gauge Brown wire from the beacon wiring to
TB1-6.
2.5.2.8 Connect the 16 gauge Blue wire from beacon wiring TB1-7.
2.5.2.9 Connect the Neutral wire from sidelight wiring to TB1-12.
2.5.2.10 Connect the Red wire from the sidelight wiring to Fuse Block
marked S1.
2.5.2.11 Connect the ground wire (if cable is used) from sidelight wiring to
ground screw right of TB1.
2.6 ALARM WIRING
Individual alarm contacts (Form C) are provided for strobe failures, power failure,
and photocell on. It is left up to the customer or installer on how they choose to
utilize these contacts with their monitoring equipment. External monitoring
equipmentisavailable. Pleaseinquire within thesales staff at the factory for models
available and pricing. Alarm configurations are shown on Drawings H40-269 and
M01-269.
2.6.1 White Strobe Failure (SF)
Connect the customer's alarm common to plug J3 terminal #5. Connect the
customer's alarm wire to plug J3 terminal #4 for normally open (or) terminal
#6 for normally closed monitoring.
2.6.2 Red Strobe Failure (RF)
Connectthecustomer'salarmcommontoplugJ3terminal#11. Connectthe
customer's alarm wire to plug J3 terminal #10for normally open (or)terminal
#12 for normally closed monitoring.
2.6.3 Power Failure (PF)
Connect the customer's alarm common to plug J3 to terminal #14. Connect
the customer's alarm wire to plug J3 terminal #15 for normally open (or)
terminal #13 for normally closed monitoring.

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
7
2.6.4 Photocell (PC)
Connect the customer's alarm common to plug J3 terminal #8. Connect the
customer's alarm wire to plug J3 terminal #7 for "off" operation (or) terminal
#9 for "on" operation monitoring.
2.6.5 Sidelight Alarm (SA)
Connect the customer's alarm common to plug J3 terminal #2. Connect the
customer's alarm wire to plug J3 terminal #1 for normally open (or) terminal
#3 for normally closed monitoring.
2.7 ALARM TESTING
To test alarms, follow these procedures using an "ohm" meter between
alarm common and alarm points.
2.7.1 White Strobe Failure (SF)
White strobe failure testing can be performed in the day mode operation.
Check for status of strobe beacon. Turn "on"switch S1 on PCB 1 and status
should change after an four (4) second delay. After test, turn switch S1 to
the normal operating position.
2.7.2 Red Strobe Failure (RF)
Red strobe failure testing can be performed in the night mode operation.
Check for status of strobe beacon. Turn "off" switch SW2 on controller panel
and status should change after a eight (8) second delay. This testing will
cause the unit to go into the back-up white strobe operation. To clear this
situation, turn on switch SW2 and reset the breaker.
2.7.3 Power Failure (PF)
While the controller is in normal operation, shut off power to the controller at
the breaker panel. Alarm should be prompt. Reset the breaker to resume
normal operation.
2.7.4 Photocell (PC)
Controller should be in the day mode of operation when performing thistest.
Check status of operation. Turn switchSW1 on (or) cover the photocell and
operation status should change state. After test, turn switch SW1 to the
normal operating position.

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
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12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
8
2.7.5 Sidelight Alarm (SA)
Controller should be in the night mode of operation. Check status of
operation. Pull fuse switch S1 open. Alarm should occur within five (5)
seconds. After test, re-engage fuse switch S1.
2.8 CONTROLLER CONFIGURATION (Refer to Drawing H01-269)
This unit is factory setup to be a master controller. If this unit is to be used in
conjunction with additional unit, change dip switch settings as drawing indicates.
The following connections will need to be interfaced between systems.
2.8.1 Connect at least an 18/20-gaugewire from PCB 1 connector P1-15 from unit
setup to be the master unit to PCB 1 connector P1-15 ofunit setup to be the
slave unit.
2.8.2 Connect at least an 18/20-gauge wire fromTB1-9 of master unit to slave unit
TB1-9.
2.8.3 Connect at least an 18/20-gauge wire(ground) from one chassis to the other
chassis.
2.8.4 Use a single breaker for supply power to all controllers.
2.8.5 Follow standard instructions provided in the manuals supplied with the
controllers.

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
9
3.0 THEORY OF OPERATION
3.1 THE POWER SUPPLY
The AC line is sent to transformers T2 through fuse F2 MOVMOD1 and relayK1. In
order for K1 to energize and complete the circuit to T1, the safety interlock switch
CSS, BSS, must be closed. The BSS switch is located in the base of the beacon.
In order for the system to operate, the beacon and the power supply must be closed
and secured.
TransformerT1secondaryoutputisaround900VAC. Theseoutputsaresenttothe
high voltage rectifier PCB (PCB #2) and converts the 900V AC of the transformer to
around +550V DC and -550V DC in daymode and +700V DC and -550V DC in
nightmode. This high voltage is then used to charge the energy storage capacitor
C102 through current limiting resistor R31, T3 and steering diode D5 for nightmode
operation. Resistor R31 and R31A are by-passed through K5 for daymode
operation.
Energy storage capacitors bank C103-110 is used for the daymode operation and
are connected to the high voltage through the normally closed contacts of relay K5.
When the light level drops below 3 foot candles the photocell supplies 120V AC to
relay K5 which removes C103-110 from the discharge path leaving capacitor C102
in the circuit for nightmode operation. The energy storage capacitor banks are
connected to the flashtube through the interconnecting tower wiring.
3.2 THE FLASHTUBE
The flashtubes FT1 (daymode) and FT2 (nightmode) are quartz tubes containing
two (2) electrodes each. The electrode at the positive (+) end is called the anode
and is connected to the positive side of the storage capacitors through inductor L1,
and L2. The electrode at the negative (-) end of the tube is called the Cathode and
is connected to the negative side of the energy storage capacitors banks.
The flashtube contains a gas called Xenon. When the high voltage energy in the
storage capacitors is connected to theflashtube, nothing will happen since Xenonin
its natural state is not a conductor of electricity. However, when a very short
duration high voltage pulse is impressed on the trigger element of the tube (via the
power supply and trigger transformers T4 and T5), the Xenon gas is ionized and
therebybecomesagoodconductorofelectricity. Thisallowstheelectricalenergyin
the storage capacitors to discharge rapidly through the flashtube, which converts
this energy to light energy and heat energy. When the voltage stored in the
capacitors discharges to a low level, the Xenon gas can no longer sustain
conduction and since the short trigger pulse is gone by this time, it deonizes
returning to its nonconducting state until another trigger pulse arrives to repeat the
process. Meanwhile, the storage capacitor is being recharged by the transformer

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12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
10
and the high voltage rectifiers.
3.3 TIMING CIRCUIT
The timing circuit is contained entirely on printed circuit board #1. The timing circuit
has its own power supply. This circuit convertstheACvoltageto approximately 12V
DC, which is used to supply all of the components in this circuit. It uses this low
voltage DC to generate pulses that control the flash rate of the flashtube. It actually
generates two (2) groups of pulses. The first is a pulse approximately once every
1.2 seconds to operate the flashtube during daylighthours. The second is a burst at
100 Hz to elongate the apparent flash during the night time hours at reduced flash
energy.
3.4 TRIGGER CIRCUIT
The trigger circuit is supplied by transformer T2 secondary windings. The 250V AC
is converted to DC, which is stored in a storage capacitor much like theactionof the
high voltage circuit. The main difference is that the storage capacitor is much
smaller. The trigger circuit receives the pulses generated by the timing circuit. It
releases its stored energy with each pulse and delivers it to the flashtube's trigger
element to initiate each flash.
3.5 ALARM CIRCUITS
3.5.1 White Strobe Failure (SF)
White Strobe Failure alarm circuit monitors each flash of the daymode
flashtube within the beacon. If the flashtube fails to flash (for any reason),
the alarm circuit operates relay K7 (on PCB #3) that the customer can
connect to their alarm transmitting devices. The alarm point can be
accessed on J3 of PCB #3.
3.5.2 Red Strobe Failure (RF)
Red Strobe Failure alarm circuit monitors each flash of the nightmode
flashtube within the beacon. If the flashtube fails to flash (for any reason),
the alarm circuit operates relay K8 (on PCB #3) that the customer can
connect to their alarm transmitting devices. The alarm point can be
accessed on J3 of PCB #3.
3.5.3 Power Failure (PF)
The power failure alarm relay is energized during normal operation. Should
the power be removed for any reason, then relay K1 would drop,creatingan
alarm for the customer alarm-transmitting device.

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
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Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
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3.5.4 Photocell (PC)
The photocell alarm relay K4 is energized whenever the photocell orSW1 is
on. This relay will allow the customer to monitor the modes of operation to
determine if switch from day to nightmode has occurred.
3.5.4.1 To test daymode operation in night time, set SW1 switch in the
middle position. Make sure to switch downward to “NORMAL” position after
testing.
3.5.5 Sidelight Alarm (SA)
Module M1 monitors the current flowing to the sidelights. This module can
monitor from (1-4) 116W lamps. Factory setting is generally for three (3)
lamps. When the current falls to two (2) amps (1 lamp less than the factory
setting), then the onboard relay will engage, creating an alarm which is then
sent to PCB #3.
3.6 BLEEDER CIRCUIT
The bleeder circuit is the most important safety item in this system. It consists of
resistor R32 connected to the high voltage storage capacitor through relay K2.
When the AC line voltage is turned off, the relay will close allowing the resistors to
discharge the high voltage stored in the capacitor banks below 50V in 30 seconds.
**CAUTION**
NEVER RELY ON THIS CIRCUIT TO RENDER THIS SYSTEM HARMLESS. ANY
DEFECT IN THIS CIRCUIT COULD ALLOW A HAZARDOUS HIGH VOLTAGE
CHARGE TO REMAIN ON THE STORAGE CAPACITORS. ALWAYS WAIT AT
LEAST 30 SECONDS AFTER POWER HAS BEEN TURNED OFF BEFORE
STARTING ANY WORK ON THIS SYSTEM. ALWAYS MEASURE THE
VOLTAGE ON THE STORAGE CAPACITORS WITH A VOLTMETER BEFORE
STARTING ANY OTHER WORK ON THIS SYSTEM. NEVER ATTEMPT TO
DEFEAT THE SAFETY INTERLOCKS.
3.7 STROBE DIAGNOSTIC CIRCUITS
The diagnostic circuit is provided as a means of making system checks and
maintenance more convenient. This circuit is entirely contained on the printed
circuit boards PCB #1 and PCB #2. The circuits that are contained on PCB #1 and

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
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12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
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PCB #2 are as follows:
3.7.1 Control Power On
Line from the 120V AC input is sent through safety switches CSS, BSS,
isolation transformer T2 and fuse F11 on PCB #1. Once this low voltage is
at PCB #1, it is rectified, then sent to LED4 (D5). If for any reason power is
interrupted, (beacon opened, controller door open, blown F1 fuse, failed
relay, etc.) LED4 would be extinguished.
3.7.2 High Voltage
The Cathode side of the high voltage HV is routed through a current limiting
resistor (R201). When the unit is in daymode, D14 will be at full brightness
when the capacitors are at full charge, but dims with the discharging of the
storage capacitors. A constant intensity indicates that high voltage is
present but capacitors are not discharging (check other indicators for fault).
When the red LED fails to glow, then the high voltage is no longer present.
3.7.3 Trigger Voltage
The trigger voltage from fuse F41 (PCB #4)is sent tocurrent limiting resistor
R1andLED6(D11). Undernormalcircumstances,theredLEDshouldbeat
full intensity indicating voltage to be normal. An absence of this indication
means that the voltage is no longer present.
3.7.4 Nightmode
Output voltage from the photocell (SSR) is connected to the coil of relay K4
on PCB #3. Whenever the photocell senses the darkness or switch SW1 is
on, relay K4 will energize, thereby sending 120V to relay U2. Relay U2 will
supply 12V DC to the timing circuit as well as LED7 (D7). LED7 will glow a
constant red when in the nightmode.
3.7.5 Primary Timing
The primary timing pulses are received at LED8 (D12). LED8 will flash
according to the pulses received from the timing circuit. If LED8 fails to
flash, then the primary timing circuit has failed. Check LED9 (D28) for
secondary timing operation. The strobe unit should produce 40 (+/- 2)
pulses per minute in daymode or nightmode back-up operation. The strobe
unit in nightmode operation should produce 22 (+/- 2) pulses per minute.
3.7.6 Timing Signal Verify

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MODEL E-1DB
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12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
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Timing pulses (either primary or secondary) are received at LED9 (D28).
The LED will flash according to the pulses received from the timing circuit.
In the unlikely event that this LED is out, then total timing failure has
occurred.
3.7.7 Flash Verified
Current from the Cathode side of the flashtube (FTC) is sent through the
current sensing transformer T4 on PCB 1. T4 will send a pulseto the gate of
the SCR's Q13 and turns it on. Capacitor C15 via Q13 will send voltage to
LED1 (D20). After each confirmed flash, LED1 will blink. Absence of a
blinking LED signifies that strobe beacon has ceased to flash.
3.7.8 Strobe Fail Test
Switch S1, when turned on, cuts off the timingsignal to the trigger circuit and
extinguishes LED8 (D12). At this time a strobe alarm should be received at
J3. The normal position of switch S1 is off (switch downward).

DUAL MEDIUM INTENSITY STROBE
MODEL E-1DB
C:\Documents and Settings\esalazar\Local Settings\Temporary Internet Files\OLK1\E-1DB Rev 10 06 03.doc
12/1997, Rev. 04/13/1998 (Dwgs. Revised) Rev. 07/6/1999, Rev. 01/13/2000
Rev. 07/2000 (o2 L/H), Rev. 10/17/2000 (Retyped)
Rev 03/28/03 (Removed #600-02)
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4.0 TROUBLE SHOOTING
Much of the trouble shooting of this system will consist of correcting a "beacon out"
situation. There may also be a failure mode where the flashtube is still flashing, but at the
wrong rate or the wrong intensity.
You must study and understand the safety messages and the theory of operation before
attempting any service on this system. Servicing this system must be done by qualified
personnel only.
4.1 TOOL REQUIREMENTS
In order to be prepared to trouble shoot or repair this system, aminimum amount of
tools and equipment will be required. A recommendation list includes:
1) 5/16 Flat Electrician's Screwdriver 1) 5/32 Allen Wrench
1) #2 Phillips Screwdriver 1) Needle Nose Pliers
1) Nut Driver or Socket Set 1) Precision Flat Screwdriver
1) Multi meter - Analog or Digital 600V AC / 600V DC Minimum
4.2 DIAGNOSTIC EVALUATION
The first step in trouble shooting of this system or performing annual maintenance
will require the technician to open the controller door. With the power off to the
controller, the technician should look over the controller circuit and repair or replace
any apparent problems such as loose wire connections or corroded terminations.
After the initial visual checks have been completed, restore power to the controller
and pull out on the plunger of the cabinet safety switch (CSS) located at the lower
right edge of the enclosure. Observe at this time the LEDs located on PCB #1 and
PCB #2. Determine, by observation of these LED indicators, if the controller is
performing to normal operation.
LEDs on PCB #1 are numbered from top to bottom, 1-9. LEDs on PCB #2 are
numbered from top to bottom, D14 - D16. (See drawings H40-269 and H01-269)
4.3 TROUBLE SHOOTING ASSISTANCE
4.3.1 Flash Verify LED - Out
4.3.1.1 Observe high voltage LED (D14) on the same beacon circuit to
determine if it is available. If the LED is dim or out completely,
then check the high voltage capacitor bank (C103 - C110
daymode, C102 nightmode) for a short. If no capacitor is found to
be shorted, check the resonant cap (C101) for a short. If the