Addi-Data PC104-PLUS1500 Technical Description page 44

Appendix
Disturb signal
Driver
Edge
EPIC
FIFO
Gain
Ground
Impedance
Inductive loads
Input impedance
Input level
Instrumentation
amplifier
Interrupt
Interrupt logic
44
Interferences that occur during the transfer caused by reduced
bandwidth, attenuation, gain, noise, delay time etc.
A part of the software that is used to control a specific
hardware device such as a data acquisition board or a printer.
Logic levels are defined in order to process or show
information. In binary circuits voltages are used for digital
units. Only two voltage ranges represent information. These
ranges are defined with H (High) and L (Low). H represents
the range that is closer to Plus infinite; the H level is the digital
1. L represents the range that is closer to Minus infinite; the L
level is the digital 0. The rising edge is the transition from the
0-state to the 1-state and the falling edge is the transition from
the 1-state to the 0-state.
= Embedded Platform for Industrial Computing
= First In First Out
The first data into the buffer is the first data out of the buffer.
The factor by which an incoming signal is multiplied.
A common reference point for an electrical system.
The reciprocal of admittance. Admittance is the complex ratio
of the voltage across divided by the current flowing through a
device, circuit element, or network.
The voltage over the inductor is U=L.(dI/dt), whereas L is the
inductivity and I is the current. If the current is switched on
fast, the voltage over the load can become very highly for a
short time.
The measured resistance and capacitance between the high and
low inputs of a circuit.
The input level is the logarithmic relation of two electric units
of the same type (voltage, current or power) at the signal input
of any receive device. The receive device is often a logic level
that refers to the input of the switch. The input voltage that
corresponds with logic "0" is here between 0 and 15 V, and the
one that corresponds with logic "1" is between 17 and 30 V.
= IA
Instrumentation amplifiers (IA) are precise measuring
amplifiers with high input impedance, low output impedance,
significantly high common-mode suppression and adjustable
gain with high continuity respecting the time.
A signal to the CPU indicating that the board detected the
occurrence of a specified condition or event.
With the interrupt logic the micro processor can be interrupted
over an interrupt and the interrupt can react to this by calling a
specific sub-program (interrupt service routine). The interrupt
logic can for example bloc or release interrupt inputs.
An external device can with a logic signal release an interrupt
request over an interrupt input, the currently running command
will be processed and then the interrupt service routine that
belongs to the interrupt input will be called. With the interrupt
PC104-PLUS1500