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.