Intrinsically safe for use

　　in gas and dust

　　hazardous areas　　 FOUNDATION fieldbus TM

　　& Profibus PA models

　　 Compatible with most

　　system hosts

　　 High contrast display

　　with backlight

　　 Intrinsically safe

　　ATEX gas

　　or ATEX gas & dust

　　or FM & ATEX gas

　　All models have

　　IECEx certification

　　FISCO compliant

　　 Four operator push

　　buttons & six optional

　　alarm outputs

　　 IP66 field mounting

　　GRP enclosure

　　 3 year guarantee

　　The MTL BA484DF Fieldbus Display is an intrinsically safe instrument that can display up to eight fieldbus process variables. Nine selectable standard screen formats contain one, two, three or four variables, with units of measurement, tag descriptions and bargraphs on some screens. The use of standard screens simplifies commissioning,but if required dedicated screens tailored to an individual application can be constructed.

　　F OUNDATION fieldbus TM and Profibus PA　versions of the BA484DF are available and have been registered by both organisations.The FOUNDATION fieldbus TM version now has selectable function blocks allowing use with most popular system hosts. Configuration files may be downloaded from the appro-priate Fieldbus Foundation TM or Profibus sites, or from www.beka.co.uk.

　　Powered by the fieldbus the BA484DF only requires a 2-wire connection, no additional power supply Zener barriers or galvanic isolators are 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 BA484DF configuration files onto the system host and selecting the fieldbus variables to be displayed, no programming is required. Configuration of the BA484DF Fieldbus Display is performed via the fieldbus and the instrument front panel push buttons.

　　ATEX, FM and IECEx intrinsic safety certification allows the BA484DF to be installed in gas and dust hazardous areas.The two fieldbus terminals comply with the Fieldbus Intrinsic Safety Concept (FISCO) simplifying system design and documenta-tion, although connection to non-FISCO intrinsically safe systems is possible using the entity concept.

　　This allows a BA484DF display to be directly connected to almost any hazardous fieldbus segment, provided that the segment can supply the 25mA consumed by the display.

　　Six optional alarm outputs may be linked to any of the displayed variables. Each isolated single pole solid state output may be condi-tioned as a combined high and low alarm, or as just a high or low alarm. All the outputs comply with the requirements for simple apparatus, which permits them to switch any certified intrinsically safe load such as an intrinsically safe sounder, lamp or solenoid valve.

　　Custom display screens dedicated to a specific application can be created by writing to the transducer block parameters. Custom designed display screens can contain text in five different font sizes plus lines, boxes,bargraphs , simple graphics and fieldbus process variables. Free programming utilities to assist with screen development are available via the BEKA web site.

　　The four push buttons on the front of the instrument may be used for returning operator acknowledgments or controls by reading a transducer block parameter. If larger industrial switches are required for these acknowledgements, up to six external push buttons may be connected to the BA484DF. 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 FOUNDATION fieldbus TM and Profibus Interface Guides and a Programming Guide that explains how to create custom display screens.

　　For panel mounting applications see the BA488CF datasheet. This instrument has a similar electrical specification but is housed in a 144 x 72 panel mounting enclosure.