Fujitsu Power Select D2703-S User manual

Issue May 2009
Product Power Select
Power Select
Pages 6
Brief Description
The Power Select feature of specific Fujitsu Siemens Computers mainboards
(such as the D2703-S) offers additional power supply options; this allows an
integration of these boards in various applications, in particular in industrial
environments.
Benefits
•Flexible options for supplying operating power to the mainboard
▬Standard ATX supply via onboard connector
▬24 V DC supply via onboard connector
▬24 V DC supply via external connector / AC adapter
•These options enable effective system integration solutions particularly in industrial environments where
standard solutions can’t meet specific requirements (e.g. SELV environment).
Power Select on the Mainboard D2703-S

Product Facts Issue: May 2009 Product: Power Select Page 2 / 6
Functional Description
The Power Select feature of specific Fujitsu Technology Solutions mainboards provides additional power supply
options for the system beyond the standard ATX power supply method. This is useful e.g. in industrial
applications where tough requirements exist concerning chassis and housing design; these requirements often
can’t be met when using standard components for mainboard, power supply and housing.
The D2703-S is a Fujitsu Technology Solutions mainboard with Power Select; this board is used as an example
in the following sections to illustrate the technology.
Power Select offers three different power supply options:
•Standard ATX supply via onboard connector
•24 V DC supply via onboard connector
•24 V DC supply via external connector / AC adapter
Typical Application Fields for Power Select
Standard ATX power supply
•Industrial designs based on standard or open-frame ATX compliant power supplies
•Any designs that require enhanced power for additional components (high-current controllers, several hard
disk drives or optical drives, etc.)
24 V DC supply via onboard connector
•Industrial applications using an existing 24 V infrastructure
•Applications that require 24 V supply via lockable power supply connector
•Avoids need for expensive DC/DC-converters in applications that require SELV (= Safety Extra Low
Voltage) according IEC60950-1
24 V DC supply via external connector / AC adapter
•Enables small chassis design (no space for power supply required)
•Enables silent chassis designs (no effort for cooling of internal power supply)
•Best choice for small and low-power system design
•Enables design with reduced safety risk and effort by using approved AC adapter according IEC60950-1
Power Select Specifications
Important Note
•The internal power supply input (ATX connector) and external 24 V DC input shall under no circumstances
be operated simultaneously, as this will cause irreparable damage to the mainboard.
•If for any reason the power supply input is changed from internal to external or vice versa (e.g. for
evaluation tests), make sure to wait at least 5 minutes after disconnecting the internal power input and
connecting the external power input or vice versa. Otherwise, the remaining charge of onboard capacitors
may cause irreparable damage to the mainboard.
Any damage caused by misuse of the power supply inputs is excluded from the standard warranty. Fujitsu
Technology Solutions cannot be held liable for any damages that result from inappropriate use of the power
supply inputs.

Product Facts Issue: May 2009 Product: Power Select Page 3 / 6
ATX compliant Power Supply Option (internal connector)
The mainboard D2703-S offers a standard ATX power supply connector as shown in the figure and table below.
Figure ATX Power Supply Connector
Table ATX Power Supply Connector Pin Assignment (D2703-S)
Pin Signal Assignment Pin Signal Assignment
1 +3.3 V 11 +3.3 V
2 +3.3 V 12 -12 V
3 ATX Detect (low asserted) 13 GND
4 +5 V 14 PS on (low asserted)
5 GND 15 GND
6 +5 V 16 GND
7 GND 17 GND
8 Powergood (high asserted) 18 +24 V
9 +5 V
AUX
(Auxiliary) 19 +5 V
10 +12 V 20 +5 V
Notes to Pin Assigment
•The mainboard D2703-S uses pin 18 of the ATX connector for an internal single 24 V DC supply (see
section “24 V DC power supply option” below for details).
•Typically pin 18 of a standard ATX power supply is “not connected”. Former ATX power supplies provided -
5 V via pin 18 which is no longer required for state-of-the-art mainboards.
•If the ATX power supply used for a specific implementation still delivers -5 V via pin 18, this causes no
damage to the mainboard D2703-S.
•In general, pin 3 of an ATX power supply is connected to GND. The mainboard D2703-S uses pin 3 to
detect if an ATX power supply is connected or not.
•Instead of a standard 20-pin ATX power supply, a 24-pin BTX power supply can be connected to the
mainboard D2703-S as well. Pins 21 to 24 will not be used.
The following table lists the requirements for the electrical characteristics that must be met by an ATX power
supply to operate a D2703-S mainboard properly. Please also pay attention to the specific notes.
•During power-on/power-off, the power supply must fulfill the general ATX requirements regarding ramp-
up/down timing for all supply voltages and the Powergood output.
•The ATX power supply input of the D2703-S has capacitive loads which need to be covered by the power
supply during power ramp-up. See the table below for the capacitance values on each voltage rail.
•The ATX power supply must be approved according to IEC60950-1.
Table ATX Power Supply Requirements (D2703-S)
Source
(ATX / BTX) Voltage PS Load (min),
see note 1) Tolerance (max) Mainboard Current (typ.),
see note 2)
Mainboard
Current (max),
see note 3)
Capacitive Input
Load
Main Power +12 V 0.15 A ± 5% 0.7 A 2.8 A 1000 µF

Product Facts Issue: May 2009 Product: Power Select Page 4 / 6
Source
(ATX / BTX) Voltage PS Load (min),
see note 1) Tolerance (max) Mainboard Current (typ.),
see note 2)
Mainboard
Current (max),
see note 3)
Capacitive Input
Load
-12 V 0 A ± 10% ~ 20 mA ~ 20 mA 10 µF
+5 V 1 A ± 5% 1.5 A 3 A 470 µF
Rails
+3.3 V 0.3 A ± 5% 0.6 A 0.6 A 500 µF
Auxiliary Rail +5 V
AUX
0.1 A ± 5% 0.15 A 0.15 A; note 4) 1000 µF
Notes to ATX Power Supply Requirements
1) The ATX power supply must support these minimum load conditions for a mainboard incl. processor and
memory if there is no power consumption by any additional components (e.g. drives, LVDS, PCI
adapters, USB devices)
2) Configuration: Turion TL-52; 2 x 1 GB, Windows XP Idle mode (w/o any add-in cards, w/o LVDS)
3) Configuration: Turion TL-66 (max. 35 W), 2 x 2 GB, Windows XP, 100% processor load (w/o any add-in
cards, w/o LVDS)
4) In order to support any USB devices in all operating conditions the power supply should be able to
provide 2 A @ +5 VAUX
24V DC Power Supply Option (internal connector)
The ATX power supply connector previously offered the option to provide -5 V via pin 18 to the mainboard, which
is no longer used for current designs. Thus, the mainboard D2703-S can be powered via pin 18 of the ATX power
supply connector with 24 V DC. The return path (GND) can be connected to pin 17.
Figure 24 V DC Power Supply Option, Internal Connector

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24V DC Power Supply Option (external connector)
The mainboard D2703-S also provides a DC connector at the rear I/O shield for an external AC adapter.
Figure 24 V DC Power Supply Option, External Connector
The DC plugs used with this connector should have the following characteristics (see also figure below):
•Inner/outer diameter 2.5 / 5.5 mm
•Contact Length 10 to 11 mm
•Straight or right-angle plug
Figure Appropriate DC Plugs for External AC Adapters

Product Facts Issue: May 2009 Product: Power Select Page 6 / 6
All rights reserved, including intellectual property rights. Technical data subject to modifications
and delivery subject to availability. Any liability that the data and illustrations are complete, actual
or correct is excluded. Designations may be trademarks and/or copyrights of the respective
manufacturer, the use of which by third parties for their own purposes may infringe the rights of
such owner. For further information see: ts.fujitsu.com/terms_of_use.html
Copyright © Fujitsu Technology Solutions GmbH 2009
Published by department:
Fujitsu Technology Solutions GmbH
Clients Group, Systemboard OEM
Buergermeister-Ulrich-Str. 100
86199 Augsburg, Germany
Company stamp
Basic Requirements for 24V DC Supply (internal or external)
•Supply via internal ATX power supply connector (Pin 18) or via external DC connector
•Max. DC operating range: 24 V +10%/-15%
•Max. ripple/noise: 400 mV (PP)
•Max. input current: 5 A
•The 24 V DC power supply input of the mainboard D2703-S provides a capacitive load of 700 µF which
has to be covered by the AC adapter respectively the 24 V DC source during power ramp-up.
•Any external AC adapter must be approved according to IEC60950-1.
Restrictions for 24V DC Supply (internal or external)
•In 24 V DC supply mode, the maximum output power available via the D2703-S mainboard connectors
(PCI/PCIe connectors, USB connectors, GPI/O, backlight connector, Firewire™ connector and drive power
connector) is limited. See the table below for the maximum allowed values on the different voltage levels.
•In 24 V DC supply mode, also the maximum capacitive load for the onboard voltage sources is limited. See
the table below for the maximum allowed values on the different voltage levels.
Table Maximum Output Power and Capacitive Load (D2703-S) in 24 V Operating Mode
Voltage Maximum Output Current Maximum Capacitive Load
+12 V 2.3 A 470 µF
-12 V 0.1 A 470 µF
+5 V 4.5 A 1000 µF
+3.3 V 5 A 1000 µF
+5 V
AUX
n/a 470 µF
Additional information and downloads
• General Information:
www.ts.fujitsu.com/mainboards
•Documentation and downloads:
ftp.ts.fujitsu.com/pub/Mainboard-OEM-Sales/
Contact: Fujitsu Technolgy Solutions GmbH:
Peter Hoser / Director OEM Sales, Clients Group, Systemboard OEM
Phone: +49 (0) 821 - 804 3177
Fax: +49 (0) 821 – 804 3329
Email: [email protected]