ROC364 Instruction Manual
G-1 Glossary Rev Jun/05
GLOSSARY
A
AGA – American Gas Association.
AI – Analog Input.
AO – Analog Output.
Analog – Analog data is represented by a continuous variable, such as an electrical current signal.
AP – Absolute Pressure.
ASCII – American (National) Standard Code for Information Interchange.
AWG – American Wire Gauge.
B
BTU – British Thermal Unit, a measure of heat energy.
Built-in I/O – I/O channels that are fabricated into the ROC and do not require a separate module. Also
called “on-board” I/O.
C
CMOS – Complementary Metal Oxide Semiconductor. Type of microprocessor used by the ROC.
COM1 / COM2 – Port on the ROC364 that may be used for host communications, depending on the
installed communications card.
Configuration – Typically, the software setup of a device, such as a ROC, that can often be defined and
changed by the user. Can also mean the hardware assembly scheme.
CSA – Canadian Standards Association.
CTS – Clear to Send modem communications signal.
D
DB – Database.
dB – Decibel. A unit for expressing the ratio of the magnitudes of two electric signals on a logarithmic
scale.
DCD – Carrier Detect modem communications signal.
DI – Discrete Input.
Discrete – Input or output that is non-continuous, typically representing two levels such as on/off.
DO – Discrete Output.
DMM – Digital multimeter.
DP – Differential Pressure.
DSR – Data Set Ready modem communications signal.
DTR – Data Terminal Ready modem communications signal.
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