| 4 Operator
Pushbuttons 6 Optional Local Alarm
Outputs
High Contrast Display with Backlight
IP66 Field Mounting GRP Enclosure
The BA684DF-P
Fieldbus Display is a general purpose instrument that can display up
to eight fieldbus process variables. Eleven selectable standard
screen formats contain one, two, three, four or eight variables,
with units of measurement, tag descriptions and bargraphs on some
screens.
Powered by the fieldbus the BA684DF-P
only requires a 2-wire connection, no additional power supply is
required. The high contrast 86 x 45mm liquid crystal display
incorporates a green backlight enabling the display to be read in
all lighting conditions from full sunlight to total darkness.
Simple commissioning results from the
use of standard display formats. Apart from loading the BA684DF-P
configuration files onto the system host and selecting the fieldbus
variables to be displayed, no programming is required. Configuration
of the BA684DF-P Fieldbus Display is performed via the fieldbus and
the instrument front panel push buttons; simple menus enable the
required standard display format to be selected and the units of
measurement and tag information for each variable to be entered.
Six optional local alarm outputs may
be linked to any of the displayed variables. Each isolated single
pole solid state output may be conditioned as a combined high and
low alarm, or as just a high or low alarm. Each output can switch
any low power load such as a sounder, lamp or solenoid valve. Alarm
configuration and the alarm set point adjustment is performed
via the BA684DF-P front panel push
buttons, as the local alarms are not accessible from the fieldbus
system host.
BA684DF-P applications vary from a
simple single variable display using a standard format, to providing
an operator interface with a custom display and control inputs via
external buttons.
The four push buttons on the front of
the instrument may be used for returning operator acknowledgments or
controls to the fieldbus host. If larger industrial switches are
required for these operator controls, up to six external push
buttons may be connected to the BA684DF-P. When the external
switches are activated, the front panel push buttons may be disabled
or operated in parallel with the external switches.
Comprehensive documentation includes
a PROFIBUS Interface Guide.
For panel mounting applications see
the BA688CF-P datasheet. This instrument has a similar electrical
specification but is housed in a 144 x 72 panel mounting enclosure.
If flammable atmospheres are present
the intrinsically safe BA484DF-P fieldbus display should be used. |
