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Rockwell Automation Publication ICSTT-RM448J-EN-P - April 2018
Glossary
G
group
A collection of two or three input modules (or two output modules), arranged
together to provide enhanced availability for their respective input or output
channels.
H
hand-held equipment
Equipment which is intended to be held in one hand while being operated with
the other hand.
HART
HART (Highway Addressable Remote Transducer) is an open protocol for
process control instrumentation. It combines digital signals with analogue
signals to provide field device control and status information. The HART
protocol also provides diagnostic data. (For more details of HART devices
refer to the HART Application Guide, created by the HART Communication
Foundation, and their detailed HART specifications. You can download
documents from www.hartcomm.org.)
high demand mode
Where the Safety Instrumented Function in the Safety System only performs
its designed function on a demand, and the frequency of demands is greater
than one per year.
hot swap
See live insertion.
I
I/O base unit
A backplane assembly which holds up to three I/O modules and their
associated termination assembly or assemblies in an AADvance controller. Part
number 9300. See 'I/O module' and 'termination assembly'.
I/O module
A collation of interfaces for field sensors (inputs) or final elements (outputs),
arranged in a self-contained and standardized physical form factor.
IEC 61000
A series of international standards giving test and measurement techniques for
electromagnetic compatibility.
IEC 61131
An international standard defining programming languages, electrical
parameters and environmental conditions for programmable logic controllers.
Part 3, which is entitled 'Programming Languages', defines several limited
variability languages.
IEC 61508
An international standard for functional safety, encompassing electrical,
electronic and programmable electronic systems; hardware and software
aspects.
