OXTS RT-UPS User manual

Confidently. Accurately.
RT-UPS
Uninterruptible
Power Supply
User Manual

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Oxford Technical Solutions
Legal Notice
Information furnished is believed to be accurate and reliable. However, Oxford
Technical Solutions Limited assumes no responsibility for the consequences of use of
such information nor for any infringement of patents or other rights of third parties
which may result from its use. No license is granted by implication or otherwise under
any patent or patent rights of Oxford Technical Solutions Limited. Specifications
mentioned in this publication are subject to change without notice and do not represent
a commitment on the part of Oxford Technical Solutions Limited. This publication
supersedes and replaces all information previously supplied. Oxford Technical
Solutions Limited products are not authorised for use as critical components in life
support devices or systems without express written approval of Oxford Technical
Solutions Limited.
All brand names are trademarks of their respective holders.
Copyright Notice
© Copyright 2013, Oxford Technical Solutions.
Revision
Document Revision: 131125 (See Revision History for detailed information).
Contact Details
Oxford Technical Solutions Limited
77 Heyford Park
Upper Heyford
Oxfordshire
OX25 5HD
United Kingdom
Tel: [phone]
Fax: [phone]
Web: http://www.oxts.com
Email: [email protected]

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Revision: 131125
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Warranty
Oxford Technical Solutions Limited warrants the RT-UPS product to be free of defects
in materials and workmanship, subject to the conditions set forth below, for a period of
one year from the Date of Sale.
‘Date of Sale’ shall mean the date of the Oxford Technical Solutions Limited invoice
issued on delivery of the product. The responsibility of Oxford Technical Solutions
Limited in respect of this warranty is limited solely to product replacement or product
repair at an authorised location only. Determination of replacement or repair will be
made by Oxford Technical Solutions Limited personnel or by personnel expressly
authorised by Oxford Technical Solutions Limited for this purpose.
In no event will Oxford Technical Solutions Limited be liable for any indirect,
incidental, special or consequential damages whether through tort, contract or
otherwise. This warranty is expressly in lieu of all other warranties, expressed or
implied, including without limitation the implied warranties of merchantability or
fitness for a particular purpose. The foregoing states the entire liability of Oxford
Technical Solutions Limited with respect to the products herein.

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Table of contents
Introduction 5
Product features 5
Description 5
Scope of delivery 7
Connecting the battery 8
Connections 11
Operation 12
LED definitions 12
Extended storage 12
RT-Range 12
Specification 14
Conformance notices 15
Regulator testing standards 15
Safety notices 16
Battery information 16
Transport by sea 17
Transport by sir 17
Disposal / End of Life 17
Revision history 18

RT User Manual
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5
Introduction
The RT-UPS is an uninterruptible power supply that can supply 12 V at 2 A for up to 1
minute. It has been designed specifically to overcome brown-out problems in vehicles
while the engine is cranking or if the driver stalls the engine and the ignition is turned
off. It is suitable for use with the Inertial+GNSS Navigation Systems from OxTS
including the RT and Inertial+ series.
Product features
The features of the RT-UPS are:
Suitable for use in vehicles.
Brown-out and black-out protections during cranking or when the engine stalls.
Wide input voltage range from 9 V to 48 V, including standard 12 V, 24 V and
42 V systems.
Charges the battery at the same time as supplying the output.
Isolated output.
Transient protection for equipment.
Description
RT-UPS is designed to enhance the use of OxTS’s Inertial+GNSS Navigation System
product range. The wide input voltage range allows use of most of the common
automotive power supplies to be used, for example 12 V, 24 V and 42 V.
The RT-UPS turns on when input power supply is on. If the input power supply is
removed or drops too low then the RT-UPS will supply power to the output for up to 1
minute. Power is supplied from an internal battery and the output voltage is not
interrupted. The RT-UPS keeps outputting a stable voltage during vehicle cranking, if
the cigar socket is temporarily removed or if there are transients on the vehicle power
supply.
While the input power supply is absent a warning buzzer will sound and the RT-UPS
will continue to supply power to the output. If the RT-UPS does not detect a load on
the output then the RT-UPS will turn off immediately and the buzzer will stop.
If the input power supply is restored within 1 minute then the RT-UPS will revert back
to the vehicles power supply and charge the battery (if necessary).

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If the input power supply is absent for longer than 1 minute then the RT-UPS will stop
the output power and the “No Power” LED will light up for up to 10 minutes.
If the internal temperature of the enclosure exceeds the “over heat temperature” then
output power will be turned off and the RT-UPS will enter standby for 5 minutes. It is
not possible to exit this mode except by waiting 5 minutes.
The RT-UPS will try to charge its internal battery whenever an input power supply is
present and charging is necessary. The internal battery is protected against charging
outside of its specified charging temperature range. If the battery temperature exceeds
the battery “upper charging temperature” charging will be suspended until the
temperature falls 5°C below the trip threshold. If the battery temperature falls below the
battery “lower charging temperature” charging will be suspended until the temperature
rises 5°C below the trip threshold.
The internal fan will operate when the output is powered. If the battery temperature
falls below “battery low temperature” the fan is temporarily switched off to avoid
unnecessary further cooling of the battery which might prevent charging due to the
“lower charging temperature” being reached.

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Scope of delivery
Table 1 lists the parts that are delivered with an RT-UPS.
Table 1. Summary of the components delivered with the RT-UPS
Qty
Description
1
RT-UPS unit
1
RT-UPS User Manual

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Connecting the battery
Air transportation regulations require that battery products are disconnected while in
transit. The RT-UPS will be shipped with the battery disconnected. The battery will
need to be connected before the RT-UPS can be used. Before transporting the RT-UPS
by air the battery should be disconnected. These instructions can be used to connect and
disconnect the battery.
Although the RT-UPS does not need to be opened in a full electrostatic free
environment, you should take care to discharge yourself on the metal case before
touching any of the internal components.
To open the RT-UPS undo the four front panel screws using a No.1 Philips screwdriver
as shown in Figure 1. Occasionally the two screws on the rear panel also need to be
undone to remove the lid.
Figure 1. Removing the front panel screws on the RT-UPS
Remove the front panel and slide the lid off the RT-UPS, as shown in Figure 2.

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Figure 2. RT-UPS showing the battery connector
Connect the battery wires to the socket on the circuit board as shown in Figure 3. The
connector can only be fitted one way round; take care not to force it incorrectly. Slide
the lid back in place, fit the front panel and replace the four screws. The battery will
now be connected correctly.
Before transporting by air disconnect the battery.
The battery should only be replaced by OxTS because the temperature sensor needs to
be fitted correctly.

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Figure 3. Battery connector fitted correctly