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Module Overview Functional Description
Services Board and Single Board Computer
The Single Board Computer (SBC) is an off the shelf processor board supplied to CareFusion Corporation by DSP Designs . The SBC
connects both mechanically and electrically to the Services Board PCB which provides the processor with the peripheral external
interfaces . The SBC also contains the 512 MByte Compact Flash card . Also available on the Services Board is a PCMCIA connector into
which attaches the Cisco wireless card and antenna .
Low Voltage Power System Board
The Low Voltage Power System Board (LVPS) provides the Workstation with low voltage DC power . The LVPS Board gets power from the
PSU module connected to the AC mains supply . A smart rechargeable battery pack is connected to the LVPS Board as a second power
source used when the AC mains is unavailable; this makes the LVPS Board act as a UPS .
The LVPS Board has an on-board charger that is responsible for keeping the smart battery pack charged . The LVPS Board provides
regulated 3 .3V and 5V to the Services Board and also provides either +15V from the power supply or battery terminal voltage to the
Tile Boards . The circuitry for switching on and off the Docking Station is on the LVPS Board, which the User activates with an externally
mounted keypad .
Tile Board
In the Workstation the Tile Board provides the interface to the pumps providing power (directly from the AC mains) and an IrDA port for
communication with the pumps . The Tile board itself communicates via the Internal Switched Ethernet to the SBC . The Tile board also
controls the Visual Status Indicator and Nurse Call interface directly without the need for the SBC to be fitted .
The Tile Board is designed in four different configurations:
• Vertical mount, two tiles high
• Vertical mount, three tiles high
• Horizontal mount, two tiles wide
• Horizontal mount, three tiles wide
To enable the modular construction, Tile Boards connect in series to extend the number of tiles within the Workstation as the
configuration shape grows .
Ethernet Isolation Board
The function of the Ethernet Isolation Board is to provide electrical separation between the internal electronics of the Workstation
and the external Ethernet connections . This board isolates both the primary 10 Base T / 100 Base-Tx interface and also the Ethernet
connection with an Auxiliary Docking Station . The board also provides the relay for the nurse call function .
Power Supply Unit
The Power Supply Unit (PSU) converts AC mains voltage into +15VDC used to power all electronic sub-systems within the Workstation
when AC mains is connected . The AC mains input is implemented as a spur off the Live and Neutral wiring within the device that also
provides AC mains power to the pumps and to the AC mains outlet connector .
Battery Pack
A 9 .6v, 2 .7A internal battery provides a UPS function should a temporary disconnection from the AC mains power supply occur . The
NiMH battery pack includes a gas gauge and supports the SMB interface .
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Alaris® Gateway Workstation
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Circuit Descriptions
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