Matrix Orbital PK202-24-USB - Manual (Page 10)

The display has a secondary power connector used for High Power GPOs. Only if the user is planning on
using GPO 1, GPO 2 and GPO 3 as +12V, should the user plug in a unmodified 3.5” floppy power cable.
Figure 3: Header
Figure 4: Connector Pinout
Pin Description
Pin 4 +5.0 VDC (normally from PC power supply)
Pin 3 Ground
Pin 2 Ground
Pin 1 +12.0 VDC (normally from PC power supply)
Make certain to have sufficient current capacity to handle the desired load. Each High Power GPO can
source over 1000mA.
2.1.2 Power by 3.5” floppy cable
The display can be powered by the USB port or by external power. An unmodified floppy power cable
may be applied externally via the high power input as shown in Figure 2. The advantage to this is, the
display will power up right away, allowing fans to start, for example, without waiting for the OS to power
the display. In addition, if the advanced GPOs are set to the +5V position power will be drawn from external
power rather than the USB port, thus allowing higher current draw.
2.1.3 USB Communications
A standard B type USB header is provided on the display for USB communication. The USB cable pro-
vides power and data to the display. There are two ways of communicating to the display. Under Windows,
the user will have direct access to the display drivers or create a virtual COM Port (VCP). With the VCP,
a new COM Port is created in Windows. Under the control panel the user can set all the options for the
USB device, including speed. Windows 98, Windows ME, Windows 2000, and Windows XP drivers have
been tested and work. VCP drivers are also available for Apple OS-X, OS-8, and OS-9. Linux drivers are
available as well, but have not been tested by us, nor will Matrix Orbital be able to provide any support for
them.
For more driver information please visit
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Matrix Orbital PK202-24-USB 6