Tait T809-10 User manual

MBZ-00001-01 1
Copyright © 2004 Tait Electronics Ltd November 2004
DRAFT 2.5
T809-10 Power Supply
Service Manual
Issue 1
November 2004
MBZ-00001-01

2MBZ-00001-01
November 2004 Copyright © 2004 Tait Electronics Ltd
About This Manual
Scope This manual contains general and technical information on the
T809-10 power supply.
Format This manual is published as a booklet that can be inserted into the
T800 Series II Ancillary Equipment Service Manual ring binder.
Updated Issues If this manual becomes outdated, a new issue will be released.
Errors If you find an error in this manual, or have a suggestion on how it
might be improved, please do not hesitate to contact Technical Sup-
port (contact details are on page 42).
Technical Information
If further information is required about the T809-10 power supply or this Manual, it can
be obtained from your nearest Tait Dealer or Customer Service Organisation. Further
technical assistance may be obtained from Technical Support (contact details are on
page 42).
Updating Equipment and Manuals
In the interests of improving performance, reliability or servicing, Tait Electronics Ltd
reserve the right to update the power supply and/or manuals without prior notice.
Copyright
All information contained in this manual is the property of Tait Electronics Ltd. All
rights are reserved. This manual may not, in whole or part, be copied, photocopied,
reproduced, translated, stored or reduced to any electronic medium or machine read-
able form without prior written permission from Tait Electronics Ltd.
Ordering Tait Service Manuals
You can order additional copies of this service manual from your nearest Tait Dealer or
Customer Service Organisation. When ordering, make sure you quote the correct Tait
product code (’M’ number). Note that only the latest issue of the manual will be avail-
able for order.
Publication Information
T809-10 Power Supply Service Manual
Issue Publication Date Product Code
1 November 2004 MBZ-00001-01

MBZ-00001-01 3
Copyright © 2004 Tait Electronics Ltd November 2004
Table of Contents
1 General Information
1.1 Introduction 5
1.1.1 Description 5
1.1.2 Protection Features 5
1.2 Specifications 7
1.2.1 Introduction 7
1.2.2 General 7
1.2.3 AC Mains Input 8
1.2.4 Output 8
1.2.5 Miscellaneous 9
1.3 Regulatory Information 10
1.3.1 EMC Conformity 10
1.3.2 Safety Approvals 11
2 Power Supply Description
2.1 Introduction 13
2.2 Front Panel Indicators 15
2.3 Features 16
2.3.1 Input Voltage Range 16
2.3.2 Protection 16
2.3.3 Remote Sense 17
2.3.4 Remote Control 17
2.3.5 Output Voltage Adjust 17
3 Installation Guidelines
3.1 Rack Mounting 19
3.1.1 T809-10-0000) Configuration 19
3.1.2 T809-10-00C1 and -00C2 Configuration 19
3.2 Wiring and Protection Devices 20
3.2.1 Protection Device Positioning 20
3.2.2 Wire Gauges 21
3.2.3 Power Supply Cord (AC Input) 22
3.3 Rear Panel Connectors 23
3.3.1 DC Output Terminal Block 24
3.3.2 Auxiliary Inputs Connector 24
3.4 Rack Frame Earthing 25
3.4.1 Earthing Procedure: Method 1 25
3.4.2 Earthing Procedure: Method 2 25
3.5 Remote Sense 26
3.5.1 Connecting the Remote Sense Wires 26
3.6 Remote Control 28
3.6.1 Using a Control Voltage Above 10VDC 28
3.7 Parallel Operation for Redundancy 29
3.8 Output Voltage Adjust 30
3.8.1 Adjusting the Output Voltage 30
3.9 Power Supply Cooling and Derating 31
3.10 Battery Charging 32
4Functional Testing
4.1 Basic Operation 33

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November 2004 Copyright © 2004 Tait Electronics Ltd
4.2 Output Current Overload 33
4.3 Output Noise 34
4.4 Overall Power Supply Stability 34
5 Troubleshooting
6 Service Information
6.1 Warnings 37
6.1.1 Warning: Lethal Voltages 37
6.1.2 Caution: Handle With Care 37
6.1.3 Warning: Safety Approval 37
6.2 Mechanical 38
6.2.1 Wiring Diagram 38
6.2.2 Screw Heads and Torque Settings 39
6.2.3 Assembly Drawing 40
6.2.4 Parts List 40

MBZ-00001-01 General Information 5
Copyright © 2004 Tait Electronics Ltd November 2004
1 General Information
This section provides:
• A brief description of the T809-10 switched mode power supply.
• Detailed specifications.
1.1 Introduction
The T809-10 is a switched mode power supply with universal AC input capability and
built-in active Power Factor Correction (PFC). The power supply is capable of supply-
ing 13.8VDC at up to 30A.
The T809-10 power supply is designed as a replacement for the T807 and T808 power
supplies, and as such, it is intended to supply T800 Series Base Stations. The T809-10
power supply is available in two configurations – the T809-10-0000 and the T809-10-
00C1 (or -00C2), as described below.
1.1.1 Description
The T809-10-0000 is a 60mm wide vertical module designed for use in a standard
483mm (19inch) T800 subrack.
The T809-10-00C1 and the T809-10-00C2 are both 2U subracks designed to fit directly
into a standard 483mm rack or cabinet. The T809-10-00C1 has a single power supply
unit fitted horizontally on the 2U front panel, while the -00C2 has two power supplies.
Functions of the power supply include remote ON/OFF control, remote sense, output
voltage adjust, and a number of circuit protection features. The remote functions are
accessible on the options connector (9-way D-range) on the rear panel (refer to Section
3.3).
1.1.2 Protection Features
The circuit protection features protect against damage caused by faults in the line or the
load, or by temperature variation.
They include:
• Inrush current limiting.
• Over-current protection (short circuit protection).
• Over-voltage protection.
• Over-temperature protection.
For more information on protection features, refer to Section 2.3.2.

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November 2004 Copyright © 2004 Tait Electronics Ltd
Electromagnetic Compatibility (EMC) and operator safety are both critical parameters
for the trouble-free functioning of a switched mode power supply. For detailed specifi-
cations, refer to Sections 1.3.1 (EMC Conformity) and 1.3.2 (Safety Approvals).
Caution: To prevent the T809-10 equipment from overheating, do not exceed the
rated current. Note: the rated output of the power supply may need to be
lowered (derated), depending on AC input voltage and ambient tempera-
ture (refer to Section 3.9).

MBZ-00001-01 General Information 7
Copyright © 2004 Tait Electronics Ltd November 2004
1.2 Specifications
1.2.1 Introduction
The performance figures given are minimum figures (unless otherwise indicated) for
equipment operating at standard room temperature (+22°C to +28°C).
Details of test methods and the conditions which apply for Type Approval testing in all
countries can be obtained from Tait Electronics Ltd.
1.2.2 General
Basic Power Supply Concept … Switched mode technology pulse
width modulation
Power Switch … Illuminated when mains supply is
present
ON LED (DC Power Indicator … LED glows green when DC output is
ON
Cooling … Convection and forced air (fan)
Efficiency … 85%, full load (typical)
Working Temperature Range … –10°C to +60°C (ambient air temp1)
Note: Derating may apply, depending on AC input voltage and ambient tempera-
ture.
Over-temperature Protection … Shutdown of output voltage
…Autorecoverywith
temperature reduction
… Temperature sensed on power
transistors and diodes
Withstand Voltage
Input to Output … 3000VAC, 1 minute
Input to Ground/Chassis … 1500VAC, 1 minute
Output to Ground/Chassis … 500VAC, 1 minute
Dimensions
Height … 183mm
1 Ambient temperature refers to the air temperature circulating around the power sup-
ply unit, inside the rack cabinet, during normal operation. It does not refer to the tem-
perature in the equipment room.

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November 2004 Copyright © 2004 Tait Electronics Ltd
Width … 60mm
Length … 390mm
Weight … 2.8kg
1.2.3 AC Mains Input
Input Voltage Range … 100 to 240VAC
Frequency Range … 50/60Hz
AC Input Current
230VAC supply … 3.5A maximum (full load)
115VAC supply … 6.5A maximum (full load)
Inrush Current
230VAC supply … 40A maximum (cold start, full load)
115VAC supply … 25A maximum (cold start, full load)
Connection to Mains Supply … IEC plug on rear panel
Power Factor
230VAC supply … >0.95 (full load)
115VAC supply … >0.98 (full load)
Note: Exact power factor depends on the impedance of the mains supply.
Input Fuse (Internal to module) … 10A 250V fast acting
… Glass tube 5 x 20mm
(Tait IPN 265-00010-21)
1.2.4 Output
Output Voltage … 13.8VDC (adjustable 13.5 to 18V)
Load Regulation … ±0.5%
Line Regulation … ±0.3% (full load)
Current Range … 0 to 30A
Output Derating … Derating may apply depending on
Input voltage and ambient
temperature1(refer to Section 3.9)
1 Ambient temperature refers to the air temperature circulating around the power sup-
ply unit, inside the rack cabinet, during normal operation. It does not refer to the tem-
perature in the equipment room.

MBZ-00001-01 General Information 9
Copyright © 2004 Tait Electronics Ltd November 2004
Warning: Exceeding the deratings shown in Section 3.9 (Power Supply Cooling and
Derating) will cause the equipment to overheat.
Output Over-voltage Protection … 18 to 21VDC
Type: Shutdown
Reset: Power OFF and ON
Output Hum and Noise … <40m Vpp (25A load with 230VAC sup-
ply)
Overload Current Limit … 37 to 48A
Type: Constant current limiting
(voltage foldback)
Reset: Auto recovery
DC Output Connector … Phoenix Contact Feed-through
terminal block (refer to Section 3.3.1)
1.2.5 Miscellaneous
Remote Control (Auxiliary inputs +RC and –RC)
Power OFF … 4 to 10V across +RC and –RC
Power ON … 0 to 0.8V across +RC and –RC
Note: The remote control circuit is optically isolated from the rest of the power
supply.
Remote Sense (Auxiliary inputs +S and –S) … 0.3V maximum voltage drop between
sense inputs and load terminals

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November 2004 Copyright © 2004 Tait Electronics Ltd
1.3 Regulatory Information
1.3.1 EMC Conformity
This equipment complies with:
EN 301 489-5 V1.3.1: ‘Electromagnetic Compatibility and Radio Spectrum Matters
(ERM); Electromagnetic Compatibility (EMC) standard for radio equipment and serv-
ices; Part 5: Specific conditions for Private land Mobile Radio (PMR) and ancillary
equipment (speech and non-speech)’, when tested in accordance with EN 301 489-1
V1.4.1: ‘Common Technical Requirements’.
Tested in accordance with:
•EN 55022: 1998+A1: 2000 (Radiated and conducted emissions).
•EN 61000-3-2: 2000 (Limits for harmonic current emissions).
•EN 61000-3-3: 1995+A1: 2001 (Limitation of voltage changes, fluctuations
and flicker).
•EN 61000-4-2: 1995+A1 (Electrostatic discharge immunity).
•EN 61000-4-3: 1995+A1 (Radiated, RF and electromagnetic field immu-
nity).
•EN 61000-4-4: 1995 (Electrical Fast Transient / burst immunity).
•EN 61000-4-5: 1995 (Surge immunity).
•EN 61000-4-6: 1996+A1 (Immunity to conducted disturbances, induced by
RF fields).
•EN 61000-4-11: 1994 (Voltage dips, short interruptions and voltage varia-
tions immunity).
For a Declaration of Conformity, refer to eudocs.taitworld.com.
FCC 47 Part 15: 2004 (for Class B of the FCC rules for the United States). Radiated and
conducted emissions, and electromagnetic susceptibility specifications.
Operation is subject to the following conditions:
1This device may not cause harmful interference.
2This device must not accept any interference received, including interfer-
ence that may cause undesired operation.
Warning: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
There is, however, no guarantee that interference will not occur in a particu-
lar installation. If this equipment does cause harmful interference to radio or
television reception (which can be determined by turning the equipment

MBZ-00001-01 General Information 11
Copyright © 2004 Tait Electronics Ltd November 2004
OFF and ON) the user is encouraged to try to correct the interference by one
or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Modifications not expressly approved by the manufacturer could void the
user’s authority to operate the equipment.
Canadian ICES-003: 2004 (for Class B). Radiated and conducted emissions, and elec-
tromagnetic susceptibility specifications.
AS/NZS CISPR22: 2004 (for Class B). Radiated and conducted emissions, and electro-
magnetic susceptibility specifications.
1.3.2 Safety Approvals
This equipment complies with:
IEC 60950-1: 2001 (edition 1). Safety of information technology equipment.
Tested according to national requirements for the following countries:
• All CB members as listed in CB Bulletin 107A, May 2004, including Aus-
tralia, New Zealand, Israel and the Republic of Korea.
• All CENELEC members as listed in EN 60950-1: 2001.
For the European Declaration of Conformity, refer to eudocs.taitworld.com
CAN/CSA-C22.2 No 60950-1. Safety of information technology equipment.
ANSI/UL Std No 60950-1. Safety of information technology equipment.
Warning: Safety approval will be void if T809-10 components are replaced with non-
equivalent rated or non-certified/non-approved components. Contact Tait
Electronics Technical Support before replacing T809-10 components. For
important servicing information, refer to Section 6.

12 General Information MBZ-00001-01
November 2004 Copyright © 2004 Tait Electronics Ltd

MBZ-00001-01 Power Supply Description 13
Copyright © 2004 Tait Electronics Ltd November 2004
2 Power Supply Description
This section provides an overview of the power supply’s features.
2.1 Introduction
The T809-10 power supply consists of:
• A Power Supply Unit (PSU) module.
• Connectors.
• Ferrite filters.
• ON LED (DC power indicator).
•Mainspowerswitch.
Figure 2.1 T809-10 internal view. Refer to Section Section 6.2.4 (Parts List) for more detail.
9-way D-range connector
(Auxiliary inputs)
Phoenix Contact Feedthrough
terminal block (DC output)
Ferrite sleeve
(DC output )
Protective earthing
Power switch
Protective bonding
Ferrite sleeve
(AC input)
IEC plug (mains input)
terminal (with solder tag)
terminal
F
oam

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November 2004 Copyright © 2004 Tait Electronics Ltd
Mains power to the PSU module is supplied via an IEC plug on the rear panel and the
illuminated power switch on the front panel (refer to Figure 2.1). This path is filtered.
The mains ground line is connected directly to the T809-10 chassis (stud terminal), and
from there to the module’s ground terminal.
The PSU module’s output is filtered by a ferrite sleeve, and then interfaces to the rack
through a Phoenix Contact Feed-through terminal block on the T809-10 rear panel.
For the wiring diagram, refer to Section 6.2.1.

MBZ-00001-01 Power Supply Description 15
Copyright © 2004 Tait Electronics Ltd November 2004
2.2 Front Panel Indicators
The status of the T809-10 is shown on the front panel by two indicators – an illuminated
power switch and an LED.
Figure 2.2 T809-10 Power Supply Front Panel
Indicator Status
Power switch illuminates when the unit
is connected to the mains power supply
The power supply has AC power
Green ON LED illuminates brightly Voltage output is at normal operational
level
Green ON LED illuminates faintly PSU module has entered over-current
mode
Green LED is OFF, but the power switch
is in the ON position
Power supply has shut down due to
over-temperature or over-voltage
conditions
Power switch
ON LED (DC power indicator)

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2.3 Features
This section describes the main features of the T809-10 power supply.
These include:
• Universal AC input capability.
• Built-in active Power Factor Correction (PFC).
• Remote control (ON/OFF).
• Remote sense.
• Circuit protection features.
•OutputVoltageAdjust.
2.3.1 Input Voltage Range
The T809-10 power supply has universal AC input range capability. It is designed to
operate for an input voltage range of 100 to 240VAC. If used at any other input voltage
the power supply may operate improperly and/or lose the PFC function.
Note: When operated at low AC input voltages, the power supply is less efficient
and produces more heat. Output derating may apply in this situation – refer
to Derating Curves in Section 3.9 (Power Supply Cooling and Derating).
2.3.2 Protection
The PSU module has inrush current limiting, and over-temperature, over-current and
over-voltage protection. For detailed specifications, refer to Section 1.2.
2.3.2.1 Inrush Current
A thermistor and relay are used within the PSU module for protection from inrush cur-
rent.
Caution: After turning the power supply OFF, a 10-second cool-down period is rec-
ommended before turning it on again. Inrush current will be a lot higher
than the specified value if the input thermistor is not allowed sufficient time
too cool down.
2.3.2.2 Over-voltage
An over-voltage of 18 to 21VDC applied to the power supply output will cause the mod-
ule to shut down. To reset the module, turn OFF the mains switch and wait 30 seconds
before switching it ON again.

MBZ-00001-01 Power Supply Description 17
Copyright © 2004 Tait Electronics Ltd November 2004
2.3.2.3 Current Overload
The module is protected from current overload (short circuit) by a voltage fold-back
method. If the load on the output starts drawing more than 35A (approximately), the
output voltage will start decreasing. The power supply recovers automatically when the
load is removed or returns to normal.
Caution: If the over-current condition lasts more than 30 seconds the power supply
may be damaged.
2.3.2.4 Over-temperature
Over-temperature will cause the module to shut down. Sensors monitor the tempera-
ture on the power transistors and power diodes. If over-temperature shutdown occurs,
switch OFF the input voltage and eliminate the cause of the overheating. Allow the
power supply to cool down to normal working temperature before switching it back
ON.
Caution: Correct mounting of the T809-10 power supply is important. For ventilation
guidelines, refer to Section 3.9 (Power Supply Cooling and Derating). Ignor-
ing these conditions may cause the module to overheat and consequently
shut down.
2.3.3 Remote Sense
The remote sense function enables the power supply to adjust its output to compensate
for voltage drop lost along the cables to the load. Connecting the remote sense allows
the power supply to maintain a 13.8VDC at the load terminals (for example, a transmit-
ter).
This feature is accessible on the auxiliary input connector (9-way D-range) on the rear
panel of the T809-10. For more information, refer to Section 3.5 (Remote Sense).
2.3.4 Remote Control
The output voltage of the PSU module can be remotely controlled (ON/OFF) by apply-
ing a DC control voltage across the remote control input terminals. The remote control
input circuit is optically isolated from the rest of the PSU circuit.
This feature is accessible on the auxiliary input connector (9-way D-range) on the rear
panel of the T809-10. For more information, refer to Section 3.6 (Remote Control).
2.3.5 Output Voltage Adjust
If it is not possible or desirable to use the remote sense feature to maintain the required

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DC voltage at the load, the output voltage of the power supply can be increased (up to
18V approximately) to compensate for the voltage drop lost along the cable.
For more information, refer to Section 3.8 (Output Voltage Adjust).

MBZ-00001-01 Installation Guidelines 19
Copyright © 2004 Tait Electronics Ltd November 2004
3 Installation Guidelines
This section gives a brief description of the basic rack mounting and wiring procedures.
3.1 Rack Mounting
The T809-10 is available in two configurations. The T809-10-0000 and the T809-10-00C1
(or -00C2).
3.1.1 T809-10-0000) Configuration
The T809-10-0000 is designed for use in a standard 483mm (19inch) T800 subrack fitted
with the same supporting guide rails as those used for the T808/T807.
To mount the T809-10-0000 into a subrack, use the two front-panel mounting screws.
3.1.2 T809-10-00C1 and -00C2 Configuration
The T809-10-00C1 and the T809-10-00C2 are both 2U subracks designed to fit into a
standard 483mm rack or cabinet. The T809-10-00C1 has a single power supply unit fit-
ted horizontally on a 2U front panel. The T809-00C2 has two power supply units fitted.
To mount the 2U subracks, secure the power supply into the rack using four front-panel
mounting screws.

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3.2 Wiring and Protection Devices
For safety reasons, all T800 subracks must be fitted with a protection device (fuse or cir-
cuit breaker) positioned after the output of the T809-10 power supply. The T809-10 out-
puts a high current when overloaded – up to 48A for an output short circuit.
3.2.1 Protection Device Positioning
The location of the DC output protection device depends on whether or not the remote
sense feature is used – refer to Sections 3.2.1.1 (When Remote Sense Is Not Used) and
3.2.1.2 (When Remote Sense Is Used).
3.2.1.1 When Remote Sense Is Not Used
When the remote sense is not used, the DC output protection device should be located
as close as possible to the output of the power supply, as shown in the diagram:
Figure 3.1 Protection device without remote sense
3.2.1.2 When Remote Sense Is Used
When installing a protection device with the remote sense connected:
• Connect the sensing wires to the power supply side of any protection
device. Failure to do this will cause the power supply to shut down if the
protection device opens the circuit. This happens because the power supply
senses 0V across the remote sense terminals and the output voltage then
increases to compensate for the apparent reduction.
• Connect the sensing wires as close as possible to the load terminals to
ensure the remote sense feature functions effectively.
As a consequence of applying these procedures, the protection device will be located
close to the load, as shown in the diagram below (Figure 3.2).
Heavy gauge wire
Load
(e.g. transmitter)
Power supply
+
–
+V
–V
Protection
device