Raytheon IDS M3-UHF-450 100W UHF BASE STATION User Manual Switching Power Supply

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Document ID	1612501
Application ID	AeBODPNkta3wRX5Rumpm0Q==
Document Description	Users Manual Switching Power Supply
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
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Filesize	35.85kB (448117 bits)
Date Submitted	2011-12-30 00:00:00
Date Available	2011-12-30 00:00:00
Creation Date	2011-11-02 13:22:59
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Document Lastmod	2011-11-02 13:24:11
Document Title	Users Manual Switching Power Supply
Document Creator	PFU ScanSnap Manager 4.2.14

s.
MM22315, Rev. B t
4. INSTALLATION
The MASTR III PSlOJOlO series Switching Power Supply is designed for MASTR Ill stations with
26VDC Power amplifiers Before installation verify that the station’s RF Power Amplifier is designed to
operate with a nominal 14VDC power supply
Figure 4-1. Figure 4-2, and Figure 4-3 show the front and rear panel views of P81030l0V120 and
P5103010V240. The power supplies are identical in design, Willi exception of the front panel service
receptacles found only on the Pstosotovtzoi
Insure that ventilation holes in the unit are not obstructed when the unit is mounted and
Operational.
Ensure that the RF Power Amplifier input voltage rating matches the rating of the
Switching Power Supply before installing the unit. Severe damage may occur to Ute
station and the Power Supply if ratings do not match
WARNING
Figure 441: Rear Panel Vlew, PSIOSOWVIZO and V240
10
l/MRRIS'
MM22315, Rev. B
4.1 INSTALLA'HON PREPARA110N
Installation and service is simplified through the use of connectors and common hardware componmts
Dining installation L-Bmekets are installed to support the rear of the Switching Power Supply.
FM103177V1 brackets are used to support the supply in 69“ and 83“ indoor cabinets and the Open Rack.
FM103177V2 brackets are used to flipper! the supply in 37" indoor cabinets. Determine the type of
cabinet and install the appropriate support brackets as shown in Figure 4-4 and Figure 4-54
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10»: VIEW
figure 4-5: Mounting Bracket Configurations, 69/83" Indoor Cabinet and Open Rack
11
s.
MM22315, Rev. B b
4.2 RACK LOCATION
12
When lowing new equipment in rack mount assemblies it is important to follow all specified installation
procedures to achieve proper air flow, wiring homes requirements. and maintain system integrity. Figure
4-6 provides rack mounting information to be followed when replacing the l9Al49979Pl power supply
with a PSlo3010V120 Switching Power Supply. The new supply should be mounted to the upper most
rack position in the cabinet or open rail station.
New installations should be installed as specified in the produa’s application assembly instructions.
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Figure A-G: Rack Mount Location
WIRING INSTALLATION
Be sure that the main AC power cord is unplugged from the AC mains and that no AC or DC power is
present. Make sure the ON/OFF switch on the front panel is in the OFF position. Determine the proper
mounting location for the power supply within the rack (refer to the appropriate base station manual).
Attadi the cable from the RF Power Amplifier lo F801 A on the rear panel. Next connect the DC Power
Cable fi'om the station T/R shelf to B0] on the rear panel.
If utilizing the battery backup option, install the battery cables to the battery while observing proper
polarity of all connections. Route the cables into the station as necessary but do not connect the battery to
the power supply at this time. Remember to always follow general safety praaices when working around
high voltage and current power devices. Always remove any jewelry and wear safety goggles!
The backup battery network is a nominal 24VDC system. DO NOT attempt to eomect
a battery network rated less than 24VDC nominal. Typically this network of batteries
consiss of a minimum of two-lZVDC batteries connected in series, or four-GVDC
cannon batteries connected in series.
Install the AC Power Cord to J802. Do not plug the AC power cord imo the AC power source at this
time. Be sure all tables are routed to prevent strain and damage to the comectors.
MM22315, Rev. B
4.4
4.5
4.6
Once the Power Supply is mounted. it may be difficult to access the rear panel
connections. Ensure that all connections are secure prior to mounting the power
were SUPP”
RACK INSTALLATION
Installation and service is simplified through the use of connectors and common hardware components.
Alter installing the support brackets to the rear of the Switdting Power Supply, and connecting all
associated wiring, install the power supply assembly into the cabinet as shown on the Assembly Diagram,
AASG-HRB 104 26, Sheet 2 and Sheet 3. found in the rear of this manual.
BATTERY BACKUP
Many choices exist when it comes to choosing the right battery for your specific application. Ines such
as life expectancy. recpired periodic maintenance, Amp-Hour capacity. recharging life cycles and cost are
just a few of the factors that go into choosing the right battery for the job.
Three basic varieties of batteries are widely used for battery backup systems Starting. Deep Cycle and
Deep Wcle Marinei Further choices within these types of batteries include Wet Cell, Sealed Cell, Gel
Cell, and various low maintenance designs.
In general, “Starting“ batteries are designed for shun duration~high current applications such as when
cranking art automobile. This type battery usually suffers a significantly reduced life cycle when “fiilly
discharged’ patterns of use occur. “Deep Cycle" batteries are designed to deliver a continuous current
supply and survive repeated “hilly discharged" patterns. “Deep Cycle Marine“ batteries combine the
advantages and disadvantages of both Starting and Deep Cycle batteries.
Several general mles can be applied to esimate the charge time of a lead acid battery systan. There is
almost a 100% conversiort of electrical energy to stored chemical energy for the first 80% of a battery‘s
charging capacity. If usable capacity is defined to be at least 80 % of full charge, then the time to reach
usable capacity is T = 0.8 x AH/C. where T is in hours AH is in Amp-Hours and C is the average
charge rate in amps. To charge the remaining 20 % to a full charge takes longer because the electrical
energy is no longer close to 100 % conversion to stored chemiuil energy. The time to a fully charge a
typical battery network um be eiimated as, T = 1.1 x AH/C, where again T is in hours AH is in Amp~
Hours, and C is the average charge rate in amps. Using this formula to estimate for a five amp charger. a
standard 50 Amp-Hour battery network would recharge in ll hours.
Estimates can be provided for air time for 3 Mn] station. Assuming a worst case scenario of a 100%
transmit duty cycle, the station air time with a 50 Amp-Hour battery would be approximately one hour
and considerably longer for a snaller transmit duty cycle,
TEST
Careful attention itould be given to stations utilizing the backup battery option. Before applying power
to the power supply. if battery backup is utilized. verify the float voltage reqaired by the battery
manufacturer‘ Battery manufacturers usually specify a specific float voltage with regard to ambient room
temperature and other factors. Adjustments should be made in accordance with the data supplied by the
battery manufacturer.
13
s.
MM22315, Rev. B t
14
A potentiometer for adjusting the float voltage of the battery charging circuit is accessible through an
opening in the top cover of the power supply assembly. Adjuyments should only be made in accordance
with the data supplied by the battery manufacturer. Damage may occur if the float voltage is not set per
the battery‘s manufacturer specifications,
specifications. DO NOT set the battery float voltage above 26,4VDC unless there is
it Damage may occur if the float voltage is not set per the battery’s manufacturer
supporting documentation from the battu'y manufacturer.
MON
The power supply should now be ready to power up and tea. him on the power supply using the front
panel ON/OFF switch. Measurements should be taken at F801 A and JSOI for proper operation. Detailed
descriptions of each connedion point can be found in Section 5.2: Adjustments and Connections
it“ utilizing battery backup, use an insulated 2mm flat tip tuning tool to adjui the float voltage in
accordance with installation data supplied by the battery manufacturer Then carefitlly connect the
battery to 1803. Alter the battery has had a reasonable charge‘ cycle tea the battery backup by
disconnecting the AC power input and check for normal station operation Recomect the AC power
input and check that the sation returns back to nonnal AC operation
Also, the two from mounted IZOVAC at 4 Amps max AC receptacles are only available on the
PSIOlOtOVlZO, and are intended for use only as convenience outlets for service personnel. The use of
these outlets for any other purpose is not recommended or supported by the manufacturer.
The two front mounted (IZOVAC version only) service
receptacles are only intended for use as convenience outlets
NOTE for service personnel. Any other use IS NOT recommetded.
Also, it is not recommended to use the PSIO3010V120 in applications above the rated nominal input
voltage of 120 VAC. The service receptacles on the fi'ont panel are passively connected to the AC input
connector via board connections No over-voltage protection or regulation is provided for the front panel
receptacles. Severe damage to equipment connected to the receptacles and personal injury may occur
when the rated input voltage is exceeded.
yams
MM22315, Rev. B
5.1
MAINTENANCE
Disassembly and/or field service is not recommended A tamper-reustant warranty label has been placed
on the unit. Opening tlte unit will damage the label and void the produa warranty. The unit should be
returned to Harris for factory service. When replacing any component such as power cords cables, and
fuses be certain to use an identical compment.
The front panel ON/OFF switch only disables the DC output voltages High Volgges
are present within the Power Supply even with the ONIOFF switch in the OFF
position
W110”
TROUBLESHOOTlNG
Since field service is not recommended Tl'oublesiooting should be limited to the isolation of the source
of faults and factory service or power supply replaeement where required. The troubleshooting
procedure in Table 1 may be helpful in isolating sources of failure, both internal and external to the power
supply unit. When a failure has occurred be sure to check associated circuitry for damaged components
before applying power to the equipment. Remember to always follow general safety practices when
working around high voltage and current power devices. Always remove any jewelry and wear safety
goggles!
The design concept of the Switching Power Supply is to provide interruption fi'ee perforrnanoe while
protecting both the power supply and supporting equipment thereby limiting the potential for catastrophic
failures. The power supply incorporates the lates state-of-the-art design and safety features including
under-voltage. over-voltage, and over-current protection circuitry. Understanding these features will aid
in the systematic troubleshooting of the entire system
5.1.1 AC Input Protectlon
The power stpply incorporates an AC lnput Under-Voltage protection model If the AC input voltage
drops within the limits of 65VAC-84VAC the unit should shutdown thereby dimbling the output voltages
at 1801, FSOIA. and 1803. When the AC Input voltage becomes greater titan 85 VAC the supply will
resume normal operation.
5.1.2 DC Output Proteetlon
The power supply is protected against over-voltage due to possible internal regulation failure. The power
supply output will latch "OFF“ under this condition. The fault must be removed and the AC power to the
station recycled to restore the DC outputs
15
s.
MM22315, Rev. B 5
5.2
5.1.3 status Slgnallng (Alarm Output)
Power sipply provides a status indicator output. In the event of an AC power or fan failure this output
can be used to provide signaling to alarm or satus inputs within the MASTR lll Base station. This output
is designed to provide a positive feedback loop for alarm inputs. An Alarm status condition could also be
generated by a loss of loop (wiring connedions).
This status indicator output monitors both the AC input and fan status. When proper AC power is present
at the AC Input to the power supply. and the speed monitoring circuitry for both fans are satisfied.
26.5VDC will be present at 1801-7. when no AC power is present at the AC Input JSOI-7 has OVDC
present.
fire power supply is protected against over-voltage due to internal regulation failure.
The output will latch "OFF" under this condition. The fault must be removed and the
NOTE AC recycled to resore the DC outputs.
5.1.4 Ambient Tem rature Protectlon
Power Supply operation during conditions in execs of the specified ambient temperature may impair the
performance of the power supply. The power supply is protected against operating in ambient conditions
in excess of the specified ambient ratings. The power srpply outputs will latch "OFF" before any damage
occurs.
ADJUSTMENTS AND CONNEC’HONS
The 272VDC and 13.6VDC power supply sections have no user adjustments. A potentiometer for
adjusting the float voltage of the battery charging ciralit is accessible through an opening in the top cover
of the power supply assembly and can be tuned using an insulated 2mm flat tip tuning tool. Battery
manufacturers usually specify a float voltage with regard to ambient room temperature and other factors.
Adjusments should be made in accordance with the data supplied by the battery manufacturer.
The rear panel connections are conveniently labeled as shown in Figure S-l. Refer to the appropriate
station manual for qwecific hookup insructions. All cable resrainls and connector latches should be
properly utilized to prevent accidental disconnection of cables, and to further redice unnecessary stress
on the cable and connector asanblies. Any cables or connectors slowing signs of damage should be
promptly replaced to prevent further damage to the power supply or other associated equipment.
5.2.1 27.2VDC Connection (F801Al
Power supply connections F801A—1 (+Positive) and F801A—2 (Negative) provide a 27.2VDC at 15 amps
connection point. This output is typically used to power the RF Power Amplifier in MASTR III Base
Stations.
A 30 amp fuse (F2) is used as a secondary safety device in the event that the over-current protection
cirCUit fails to protect the sipply and connected equipment. However. the built-in over-current and over-
voltage protection ciratit is the main protection device for this section of the power supply. and should
provide adequate protection from most overload conditions,
16

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