Large 5 Digit Display with Bargraph
Displays up to 8 Variables
Selectable Node or Listener Mode
IP66 Field Mounting GRP Enclosure
The
BA644DF-P PROFIBUS Indicator is a general purpose instrument that
can display up to eight fieldbus process variables. A numeric
annunciator on the left hand side of the screen shows which variable
is being displayed. This version of the indicator supports PROFIBUS
PA protocol; for FOUNDATION™ fieldbus systems an alternative version
is available - please see the BA644DF-F FOUNDATION™ fieldbus
datasheet.
Configuration as a fieldbus Node or
Listener using the indicator’s front panel push buttons allows the
instrument to be tailored to suit local requirements. When
configured as a Listener the BA644DF-P is not visible to the
fieldbus host; may not be subject to a Node Licence Fee and is
configured and controlled via the instrument’s front panel push
buttons.
As a fieldbus Node, the indicator is
configured by the fieldbus host and the displayed variable is
selected from the eight pre-configured variables using the
indicator’s front panel up and down buttons.
Powered by the fieldbus the BA644DF-P
only requires a 2-wire connection to the fieldbus segment, no
additional power supply is required. Compatibility with most
Profibus hosts is assured by the use of eight Analogue Output and
six Digital Input function blocks.
The liquid crystal display has large
20mm high digits providing maximum contrast and a wide viewing
angle, allowing the BA644DF-P PROFIBUS indicator to be read easily
in most lighting conditions. The five digits, with four decimal
points and a negative sign, may be configured to display any
variable between -99999 and 99999. The 31 segment bargraph, which
provides a bold analogue indication of the fieldbus variable may be
conditioned to any starting or finishing values within the fieldbus
variable’s range.
The enclosure which is moulded in
glass reinforced Polyester (GRP) has stainless steel fittings,
silicone gaskets and an armoured glass window. Its robust
construction provides IP66 protection which has been independently
assessed by Intertek Testing Services. A separate terminal
compartment allows the instrument to be installed and terminated
without exposing the indicator electronics. To further simplify
wiring and subsequent inspection, the terminal cable entries and
clamping screws are forward facing. The indicator may also be
mounted onto a vertical or horizontal pipe using one of the
accessory kits.
Operator acknowledgements may be
returned to the fieldbus host when the BA644DF-P is configured as a
fieldbus Node. Six Digital Input function blocks in the indicator
which are supported by most Profibus hosts enable the status of the
four front panel push buttons to be read.
A Comprehensive PROFIBUS interface
guide contains commissioning information for the BA644DF-P. Copies
may be requested from the BEKA sales office or downloaded from
www.beka.co.uk
Units of measurement and the
instrument’s application or tag number can be economically marked
onto the display escutcheon prior to despatch or after installation
on-site. Alternatively, for customers who prefer a stainless steel
label, the indicator can be supplied with a removable blank or
custom etched stainless steel plate mounted on the front of the
enclosure.
For panel mounting applications see
the BA648CF-P PROFIBUS datasheet. This instrument has a similar
electrical specification but is housed in a 144 x 72 panel mounting
enclosure.
For use in hazardous areas the
intrinsically safe BA444DF-P PROFIBUS and the Type n BA444NDF-P
PROFIBUS indicators are available. These are similar to the
BA644DF-P PROFIBUS indicator but have international certifications
allowing installation in most gas and dust hazardous area. |