Rockwell Automation 1746-NR4 SLC RTD/Resistance Input Module User Manual - Manual (Page 137)

Publication 1746-UM008B-EN-P - December 2006
Glossary 137
full scale range (FSR)
The difference between the maximum and minimum specified analog
RTD or resistive input values.
gain drift
The change in full scale transition voltage measured over the
operating temperature range of the module.
input data scaling
The data formats that you select to define the logical increments of the
channel data word. These may be scaled-for-PID, or Engineering Units
for RTD or potentiometer inputs, which are automatically scaled. They
may also be proportional counts, which you must calculate to fit your
application’s temperature or resistance resolution.
local configuration
A control system where all the chassis are located within several feet
of the processor and chassis-to-chassis communication is via a
1746-C7 or 1746-C9 ribbon cable.
LSB (Least Significant Bit)
Refers to a data increment defined as the full scale range divided by
the resolution. The LSB represents the smallest value within a string of
bits.
multiplexer
A switching system that allows several input signals to share a
common A/D converter.
normal mode rejection (differential mode rejection)
A logarithmic measure in dB, of a device’s ability to reject noise
signals between or among circuit signal conductors, but not between
equipment grounding conductor or signal reference structure and the
signal conductors.
potentiometer (Pot)
A variable resistor that can be connected to the RTD module.