
Instruction Manual
L-804 Runway Guard Light, 804E-AP1
2
7General Description
7.1 General
The Crouse-Hindselevatedrunwayguardlight (ERGL) is an ETL verified FAA L-804. The ERGL runway
guard light is an elevated light fixtureconsistingoftwo LED modules thatalternately flashes45-50per
minutein yellowto identify taxiway holding positionlines.The clearsignallenses are glassandare housed
in aluminumenclosures. Accessto eachLED module is made throughahinged coversecuredby locking
latches. No specialtools arerequired formaintenance.The UniversalPowerSupply is housedin an
aluminumenclosure attached betweenthe two LEDboards. UniversalPowerSupply can bechangedwith a
nut driverand disconnecting thefast-onterminals fromtheterminals. A spare doorwith replacement circuit
cards can be slid backontothe hingepin and fast-on terminals reattached to circuit card terminalblocks.
Positive angularadjustment is made by moving the hairpin cotteron thesupport pin through theappropriate
hole in the steelside supportsand post. The unit is attachedto a standardsteel10-1/4dia. B.C. L-867 light
base (customersupplied)andheavy12-inch diameterbase plate (customersupplied,see accessories,page 4)
with a 2-11 1/2 NPSM threadedaluminumcoupling. The coupling is prevented fromrotatingdueto jet blast
by an aluminumanti-rotationplate boltedto thebaseplate. In addition,thecouplingis preventedfrom
rotating andlifting out ofits aluminumslide fit mount by set screws. A stainless steeltetheris provided for
securingtheunit to the base plate. Poweris provided to theunit through an L-823style plug. A groundstud
is provided internalforunitswith monitoringand externalforunits without. Allhardwareis type 18-8
stainlesssteel. Poweris provided to theunit through an appropriate size isolationtransformer(not provided)
or name plate rated ACorDC powersources. The averageweight ofthe unit is approximately 45 lb.
7.2 Units without Control SystemMonitoring (6.6A)
Powerprovided tounit fromthe65W,6.6A isolation transformerthrough asupplied 5-pin molded L-823
plug. See Figure 7 on page 19(without monitoring).
7.3 On/Off Switch (Option -1 (6.6A)) Mode 1
Allows unit to be servicedorhave UniversalPowerSupplies changedin field without turning poweroffat
source. Switch isolatesthe secondary ofisolationtransformerfromthe internalcircuitry.
7.4 6.6A Series Unit with Monitoring (Standard Unit orOption 5) - Mode 1
Unit requires connection to a 65W,6.6A series secondary isolationtransformer. A molded female connector
(L-823, Style7) is providedforthe monitoringconnectionto a 5-pin L-823 style plug. The5-pin female
connectorprovides forconnectionto theisolation transformer,agroundlead forconnectionto theL-867
internalground stud,andtwo leadsforconnectingthe monitoring signallines. Shieldedmonitorleadsare
connected to the circuit card relay common and normally open orclosedcontact(customercan changethis
connectiondependingon theirpreference). The monitoringrelay (rated 120V, 2 A resistive load)will
provide asignalpath forfailuredetectionifthe fixture is not operatingcorrectly to a customerprovided
indicator. PerFAA AC150/5340-28, a threeorfive step FAA L-828constant current regulatorshould be
used forpoweringtheRunwayGuard Light.
ForOption 5, the monitoring connectoris changed toan L-823, Style 6 connectorfordirect power
monitoring connections toCooperCrouse-HindsLogitracDevice.The indication is typically set to NCfor
Option 5.