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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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

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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

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Connections
The RT-UPS has two leads that need to be connected for correct operation. The pin
connections are shown in Table 3 and Table 4.
The input power connector supplied with the RT-UPS contains a 5 A fuse, which is
required as part of the input protection circuit. If the fuse in the plug needs to be
replaced then it should be replaced with the Littelfuse model specified in Table 2.
Table 2. Replacement fuse
Parameter
Specification
Manufacturer
Littelfuse
Part Number
0214005
Description
5 A Torpedo Type Fuse
Dimensions
25 x 6 mm dia
Voltage Rating
36 V
Table 3. Input power lead pin configuration
Pin
Direction
Description
1
Input
Power in, 9 to 48 V dc. This pin is the tip of the connector. (Brown wire).
2
Input
Input ground (yellow/green wire).
Connector: Automotive univ fused plug (cigar lighter plug)
Table 4. Output power lead pin configuration
Pin
Direction
Description
1
Output
Power output, 12 V, 2 A (brown wire).
2
Output
Power output, 12 V, 2 A (white wire).
3
Output
Output ground, isolated from input (blue wire).
4
Output
Output ground, isolated from input (black wire).
Connector: Binder Series 763, 4-way, socket, M12

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Operation
Mount the RT-UPS so that the fan and air vent holes are not covered and so that the
heat can be removed from the internal components.
To operate the RT-UPS, connect the output connector (Binder Series 763) to the
product that needs a stable 12 V power supply. Connect the input connector (cigar
plug) into the input power source. The input power supply can be disconnected at any
time. To stop the output power early, disconnect the product from the output power
connector.
LED definitions
Table 5 lists the definitions of the LEDs on the RT-UPS. As a special condition all the
LEDs flash when the RT-UPS has overheated.
Table 5. LED definitions
LED label
Description
No power
Lit when there is no power available in the internal battery to supply the
output.
Discharging
Lit when power is being supplied from the internal battery.
Charging
Lit when charging at the standard rate. Slow flash when charging at the
fast rate. Single fast flash when too cold to charge. Double fast flash when
too hot to charge.
Output OK
Output power on.
Extended storage
The life of the batteries in the RT-UPS is reduced if they are left discharged for a long
period of time. When leaving the RT-UPS for long periods of time it should be charged
monthly.
RT-Range
When using the RT-UPS with the RT-Range product from OxTS care should be taken
when connecting the systems. The RT-UPS should be connected between the RT-
Range Hunter system and the RT. It should not be connected between the power supply
and the RT-Range Hunter system as the current draw will be too much and may
damage the RT-UPS. Figure 4 illustrates the correct connection set up.

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Figure 4. Connection set-up with RT-Range

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Specification
The specifications for the RT-UPS are shown in Table 6.
Table 6. Specifications
Parameter
Value
Input power supply
9 to 48 V dc
Output voltage
12 V dc
No load detection current
200 mA
Maximum output current
2 A
Output power
24 W
Efficiency
>60%
Fuse
5 A (Yellow, continental style)
No supply operation
up to 1 minute
No supply indication
up to 10 minutes
Internal battery
Nickel MetalHydride 12 V nominal (10 x 1.2 V
cells, Varta 10V600HR)
Battery charge time
1.5 hours typical
Transient protection
Yes
Short circuit protection
Yes
Supply reversal protection
Yes (will blow fuse)
Dimensions (mm)
170 x 81 x 48 (excluding cables)
Weight
0.9 kg (including cables)
Operating temperature range
-10° to 50ºC
Internal over heat temperature
75ºC typical
Upper charging temperature
65ºC typical
Lower charging temperature
10ºC typical
Environmental protection
None

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Conformance notices
The RT-UPS complies with the radiated emission limits for 47CFR15.109:2010 class A
of Part 15 subpart B of the FCC rules, and with the emission and immunity limits for
class A of EN 55022. These limits are designed to provide reasonable protection
against harmful interference in business, commercial and industrial uses. 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. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
Re-orient or relocate the receiving antenna
Increase the separation between the equipment and the receiver
The RT-UPS conforms to the requirements for CE.
Regulator testing standards
47CFR15.109:2010 class A (radiated emissions)
EN 300 440-1:2008, test methods 8.3.2 (conducted emissions) and 8.3.3 (radiated
emissions)
EN55022 class A according to standard EN 301 489-1:2008 (conducted
emissions)
EN6100-4-3 criterion A according to standard EN 301 489-1:2008 (radiated
immunity)
ISO7637-2 criterion B, 12V and 24V according to standard EN 301 489-1:2008
(vehicular transients and surges immunity)
EN60950-1:2006 (safety)
A11:2009 (safety)

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Safety notices
Do not block the apertures in the box otherwise overheating will occur, which will
eventually result in thermal shutdown of the device.
Do not obstruct the internal fan.
If the unit becomes excessively hot please unplug the device and allow it to cool.
Do not replace the fuse (in the cigar lighter connector) with anything other than a 5 A
fuse. If another connector is used then make sure that a 5 A fuse is included in the
positive supply.
Do not deliberately short circuit the outputs.
Do not short circuit the internal battery.
Do not throw or cause impact to the RT-UPS as it contains batteries.
Do not burn.
The enclosure will become warm whilst in use; allow heat to be ejected from the
enclosure.
Do not dispose of in domestic waste.
Do not ingest the batteries.
Do not allow the product to become wet or immersed in water.
Recommended storage temperature 20°C.
Battery information
The battery replacement should only be performed by OxTS as the temperature sensor
needs to be reattached and the battery strain relief replaced.
The following safety information has been provided by the battery manufacturer.
1. The only battery replacement is a Varta 10V600HR (To Varta drawing no.
074530).
2. Keep out of the reach of children. If swallowed, contact a physician at once.
3. Do not reverse the battery connections. Strictly follow the signs + and –shown on
batteries and appliances. If batteries are put in the wrong way they are bound to

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become hot very quickly. This can lead to gas or toxic material leakage and/or to a
violent rupture.
4. Do not incinerate or mutilate otherwise the batteries may burst or release toxic
material. Do not throw battery into open fire. This can cause violent rupture due to
the heat.
5. Do not deform batteries. Batteries are not to be crushed, drilled into or damaged in
any other way. This can lead to toxic material or gas leakage and/or violent rupture.
6. Do not short circuit the battery. This can lead to toxic material or gas leakage
and/or violent rupture.
7. The Battery should be disposed in accordance with local and state regulations.
Transport by sea
For any sea transportation of nickel-metal-hydride round cells there is an additional
requirement:
1. Batteries must not be stored in the near proximity of external heating sources.
Transport by sir
Any electrical battery or battery powered device, equipment or vehicle having the
potential of a dangerous evolution of heat must be prepared for transport so as to
prevent:
1. A short circuit. In the case of equipment, by disconnection of the battery and
protection of exposed terminals
2. Accidental activation.
The battery must be disconnected before transporting by air.
Disposal / End of Life
For disposal of the battery, take to local authorities recycling centre or contact OxTS
for advice. The battery waste code is 160605, “Other batteries and accumulators
(nickel-metal-hydride batteries)”.

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Revision history
Table 7. Revision history
Revision
Comments
100816
Initial version (draft only)
110607
First release
130613
Updates, discharge time reduced to 1 minute
131125
Minor updates, RT-Range disclaimer