TotalFlow XRC6490, Руководство пользователя

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B-10
TERM DEFINITION
Circuit 1. The complete path between two terminals over which one-way or two-way
communications may be provided. 2. An electronic path between two or more
points, capable of providing a number of channels. 3. A number of conductors
connected together for the purpose of carrying an electrical current. 4. An
electronic closed-loop path among two or more points used for signal transfer.
5. A number of electrical components, such as resistors, inductances,
capacitors, transistors, and power sources connected together in one or more
closed loops.
Circuit board Sometimes abbreviated PCB. Printed circuit boards are also called cards. A
thin plate on which chips and other electronic components are placed. They fall
into the following categories:
Motherboard: Typically, the mother board contains the CPU, memory and basic
controllers for the system. Sometimes call the system board or main board.
Expansion board: Any board that plugs into one of the computer's expansion
slots, including controller boards, LAN cards, and video adapters.
Daughter Card: Any board that attaches directly to another board.
Controller board: A special type of expansion board that contains a controller
for a peripheral device.
Network Interface Card (NIC): An expansion board that enables a PC to be
connected to a local-area network (LAN).
Video Adapter: An expansion board that contains a controller for a graphics
monitor.
Class 1, Division 1 Class 1 refers to the presence of flammable gases, vapors or liquids. Division 1
indicates an area where ignitable concentrations of flammable gases, vapors or
liquids can exist all of the time or some of the time under normal operating
conditions.
Class 1, Division 2 Class 1 refers to the presence of flammable gases, vapors or liquids. Division 2
indicates an area where ignitable concentrations of flammable gases, vapors or
liquids are not likely to exist under normal operating conditions.
Class 1, Zone 0
Class 1 refers to the presence of flammable gases, vapors or liquids. Zone 0
refers to a place in which an explosive atmosphere consisting of a mixture with
air of flammable substances in the form of gas, vapor or mist is present
continuously or for long periods or frequently.
Class 1, Zone 1 Class 1 refers to the presence of flammable gases, vapors or liquids. Zone 1
refers to a place in which an explosive atmosphere consisting of a mixture with
air of flammable substances in the form of gas, vapor or mist is likely to occur in
normal operation occasionally.
Class 1, Zone 2 Class 1 refers to the presence of flammable gases, vapors or liquids. Zone 2
refers to a place in which an explosive atmosphere consisting of a mixture with
air of flammable substances in the form of gas, vapor or mist is not likely to
occur in normal operation.
Clean Gas Gas that has no particles larger than one micron and no more than one
milligram of solids per cubic meter.
Clear To restore a device to a prescribed initial state, usually the zero state.
Clock The source(s) of timing signals for sequencing electronic events (e.g.
synchronous data transfer).
Closed Circuit Voltage The difference in potential between the terminals of a cell/battery when it is
discharging (on- load condition).
CM Acronym for Cubic Meter.
Cm Acronym for Centimeter.
CMM Acronym for Cubic Meter per Minute.
CMOS See Complimentary Metal-Oxide-Semiconductor.