Dräger REGARD 3000 Mode D'emploi page 183

Term
Channel
Module
Threshold limit
Normally Energized
Port
Slotcover
Terminal Block
Transmitter
16 Annex
16.1 Abbreviations
Abbreviation
ACK
ATEX
DCS
HART
LACK
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Instructions for use
REGARD 3000
Description
A channel is a configured port and forms either an input
or output channel.
Unit for connecting input and output signals. The con-
nected transmitter is also supplied with energy via the
module (exception: 3-wire transmitter with a current con-
sumption greater than 500 mA).
The smallest measured value of the gas concentration
for which the accuracy is within the specified limits.
Mode of operation of a relay in which the coil is ener-
gized in the normal state. Used in safety-critical applica-
tions, because if there is a power failure in the control
system the relay will fail and the alarm state will be
received.
Physical output or input of a module. A configured port
forms a channel (input channel or output channel). The
number of ports in a module shows how many of the total
number of channels possible in the system are config-
ured through that module.
Cover for a slot
Terminal block
Connecting element for electrical connection of input and
output signals to a module
Fixed gas detector, which supplies a conditioned electri-
cal signal or a measured value output in accordance with
a generally accepted industry standard (4 to 20 mA). It is
designed for operation with separate controllers, sys-
tems for data recording and signal processing, central
monitoring systems or similar systems. They typically
process information from various locations and sources
with gas detectors but also from other sources.
Explanation
Non-latching and acknowledgeable relay
Configurable behaviour of a relay output.
Atmosphères Explosives
ATEX Directive
Distributed Control System
Highway Addressable Remote Transducer, standardised com-
®
munication system for designing industrial fieldbuses.
®
HART facilitates digital communication between multiple sub-
scribers via a common data bus.
Latching and acknowledgeable relay
Configurable behaviour of a relay output.
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en
Annex
183