E.F. Johnson 242-2008-332, Руководство пользователя

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INSTALLATION
2-2
September 1994
Part No. 001-2008-300
should be protected by a circuit breaker. (A separate
15A breaker is recommended for three Universal Sta-
tions). An AC surge protector is recommended for all
equipment.
Each Universal Station requires an outlet and the
Receiver multicouplers require one each, so for a 5-
channel system, a minimum of 7 outlets is required.
An additional three outlets should be added for test
equipment. The outlets must be within 3 feet of each
Universal Station cabinet. Future system expansion
should be considered when electrical work is being
planned for the initial system.
The Universal Station power supply can be
equipped with an optional 24V DC back-up in the
event of AC power failure. Since the transmitter will
remain on full power, if desired, the DC power source
must have a current capability of about 20A per 110W
repeater or 100A for 5 - 110W repeaters. The multi-
coupler requires another 0.5A for a total system
requirement at 24V DC of 100.5A for 110W Universal
Stations.
2.5 BATTERY BACKUP
If the power supply is equipped with battery
backup, screw lugs are provided on the front of the
power supply for battery connections (see Figure 2-2).
A switch is provided for charging the battery or can be
off if a separate battery charger is used. A battery
temperature sensor connection is also provided. The
temperature sensor cable is shown in Figure 2-2. LED
indicators are provided to show Reverse Battery con-
nection, Charger On/Off and Battery Fault.
Figure 2-1 BATTERY BACKUP CONNECTOR
B- B+ TEMP
ACTIVE
CHARGER
ON
CHARGER
FAULT
BATTERY
BATTERY
REVERSE
GROUND
EARTH
NEUTRAL LINE
SWITCH
Figure 2-2 TEMPERATURE SENSOR CABLE
2.6 GROUNDING
CAUTION
PROPER SITE GROUNDING AND LIGHTNING
PROTECTION ARE VERY IMPORTANT TO PRE-
VENT PERMANENT DAMAGE TO THE UNIVER-
SAL STATION.
As in any fixed radio installation, measures
should be taken to reduce the possibility of lightning
damage to the equipment. Proper grounding elimi-
nates shock hazard, protects against electromagnetic
interference (EMI) and lightning.
Ground each piece of equipment separately. Do
not ground one piece of equipment by connecting it to
another grounded piece of equipment.
A good DC ground must be found or created at
the site. Roof top site grounds can be researched
through the building management or architects.
Tower site grounds must be made with grounding
rods. The many techniques for providing adequate
grounds for towers and poles and for installing build-
ing ground bus lines are beyond the scope of this man-
ual. Refer to National Electrical Code article 250
"Grounding Techniques," article 800 "Communica-
tions Systems" and follow local codes.
The ground bus should be routed within 5 feet of
the system with a runner of 6 AWG or larger solid
copper wire or 8 AWG stranded copper wire to the
floor area.
Each transmission line at the point where it enters
the building should be grounded using 6 AWG or
larger solid copper wire or 8 AWG stranded wire.
BATTERY
TEMP
TERMINAL
NEGATIVE
GND
BLK
WHT