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• NPN-compatible PLC devices.
NPN-compatible PLC devices include all forms of external devices that are
programmable logic controllers with NPN transistor types. An NPN-compatible
PLC device has an input that is enabled when it is grounded (sinking input).
• PCIe.
Peripheral Component Interconnect Express. The standard used for the computer
bus that acts as an interface between hardware devices (such as your computer and
its video card).
• PoE.
Power-over-Ethernet. A network connection that passes electrical power along with
data using Ethernet cabling. A PoE connection can power devices external to your
unit, such as a network-aware camera or telephone.
• PNP-compatible PLC devices.
PNP-compatible PLC devices include all forms of external devices that are
programmable logic controllers with PNP transistor types. A PNP-compatible
PLC device has an input that is enabled when it receives a current (sourcing input).
• POST.
Power-on self test. This test is performed by the BIOS, as soon as the computer is
turned on. POST gathers information about what the unit contains, and ensures
that everything is working properly. It works by performing a list of tasks related
to testing the RAM, the on-board hardware, the expansion boards, the mass
storage devices, and other installed components. If all the tasks are completed, the
BIOS will proceed to boot the operating system. If a task cannot be completed,
POST will report an error to the BIOS, and a message will be displayed.
Glossary
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