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What is the WS5A?
The System
Powered USB
Powered USB, also known as Retail USB, or USB Plus Power, is an addition
to the Universal Serial Bus standard that allows for higher-power devices to
obtain power from the workstation instead of an external power supply.
Powered USB is a proprietary variant of USB, developed by IBM, NCR, and
FCI/Berg, and not endorsed by the USB Implementers Forum (USB-IF).
The Workstation 5A implements a form of Powered USB in the following
manner. See Figure 1-3, below.
Figure 1-3: Workstation 5A Powered USB Implementation (+12V Example)
An internal cable carries the powered USB voltages (+5V, +12V, +24V) and
USB Port 6 from system board header J14 to the IO Panel connector shown on
the left of the illustration.
Separate dongles, one for each voltage, attach to the IO Panel connector and
terminate in the appropriate powered USB connector. The center of the
illustration shows an example of the +24V powered dongle.
Details of a +24V powered USB connector are shown on the right of the
illustration. Consisting of two connectors stacked upon one another, the top
half of the connector supplies the specified voltage and includes keying
specific to that voltage. The lower half of the connector is a standard USB
Type A receptacle that supplies +5V and USB Port 6 data.
This implementation may not be capable of providing the amount of power
specified in the Powered USB Standard. The MICROS implementation
provides the following power capacity. Applies to Revision C and D.
•
+5V/2.2A (11W)
•
+12V/1A (12W)
1-6
Workstation 5A Setup Guide - Fourth Edition
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