National Instruments NI 2565 User Manual page 39

Glossary
bus
C
C
Category I, Category II,
CAT I, CAT II
channel
contact bounce
D
DC
debounced
device
digital multimeter
DIN
diode
NI 2565 User Manual
the group of conductors that interconnect individual circuitry in a computer.
Typically, a bus is the expansion vehicle to which I/O or other devices are
connected. Examples of PC buses are the ISA and PCI bus.
Celsius
These categories refer to different levels in impulse voltage. Category I is
at the signal level, and refers to special equipment or parts of equipment,
telecommunication, electronic, and so on, with smaller transient
overvoltages than Category II. Category II is local level, and refers to such
items as appliances and portable equipment. The impulse withstand
voltages for each category are as follows:
Voltage Phase-to_Earth Category I Category II
150 V 800 V 1,500 V
300 V 1,500 V 2,500 V
pin or wire lead on the multiplexer to which you apply or from which you
read the analog or digital signal. Signals can be single-ended or differential.
the intermittent switching that occurs when the movable metal parts of a
relay make or break contact
direct current
indicates when the contact bounce has ended. See contact bounce.
a plug-in board, card, or pad that can contain multiple channels and
conversion devices. Some examples of devices are computers,
multimeters, multiplexers, oscillators, operator interfaces, and
counters.
a multifunction meter used to make measurements such as voltage, current,
resistance frequency, temperature, and so on
Deutsche Industrie Norme
an electronic component that acts primarily as a one-way valve
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