BA307NE
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Safe area Rugged 2-wire 4/20mA 4 digit indicator Ex nA and Ex tc certified for installation in Ex n, Ex e, Ex p or Ex tc panel enclosure located in Zones 2 or 22 u Rugged IP66 stainless steel enclosure. Shown with optional backlight - loop powered The BA307NE loop powered, panel mounting Indicator has a rugged stainless steel housing allowing it to be safely installed in an Ex n, Ex p, Ex e or Ex tc panel enclosure located in Zone 2 or 22, without the need for Zener barriers or galvanic isolators. The indicator has a full 4 digit display with guaranteed performance between -40 and 70°C. The scale card can easily be marked to show the units of measurement and can be installed on-site without dismantling the instrument or removing it from the panel. The main application of the BA307NE is to display a measured variable in meaningful engineering units in Zone 2 or 22. The front of the indicator has certified impact and ingress protection allowing it to be installed in an Ex n, Ex p, Ex e or Ex tc panel enclosure without invalidating the panel's impact and ingress protection. The bold 15mm high 4 digit display provides maximum contrast and has a wide viewing angle, allowing the BA307NE to be read easily in most lighting conditions over a wide temperature range. An optional factory fitted backlight is available for applications in poorly illuminated areas. The four digits, with three decimal point positions and a negative sign, may be configured to display any variable between -9999 and 9999. ATEX and IECEx Ex nA non sparking certification allows the BA307NE, when installed in a Ex n, Ex p, or Ex e panel, to be operated in a Zone 2 gas hazardous area without the need for Zener barriers or galvanic isolators. For European and inter­ational Zone 2 applications the n BA307NE offers a less expensive alternative to intrinsically safe and flameproof indicators. Ex tc dust certification also allows the BA307NE, when installed in an Ex tc panel enclosure, to be operated in a Zone 22 dust hazardous area, again without the need for Zener barriers or galvanic isolators. A backlight which may be loop or separately powered is available as a factory fitted option. It provides green background illumination allowing the display to be read at night or in poorly illuminated areas. When powered from the 4/20mA loop no additional field wiring is required but the indicator's voltage drop increases. Powering from a separate supply produces a brighter backlight but requires additional wiring. Optional dual alarm outputs which can switch hazardous or safe area loads, such as sounders, beacons or solenoid valves are available as a factory fitted option. The two galvanically isolated solid state alarm outputs may be independently configured as high or low alarms with normally open or closed outputs. Annunciators on the display show the status of both outputs. Units of measurement may be shown on the scale card which is visible through the window on the right hand side of the display. Instruments are supplied with the units legend requested when ordered, but the scale card may be easily changed on-site without removing the BA307NE from the panel or opening the instrument enclosure. certification eliminates the need for Zener barriers and galvanic isolators. u Loop powered only 1.2V drop. u digit 15mm high 4 display. u Optional backlight & alarms. u Easy on-site scale card installation. u Root extractor and 16 segment lineariser. Application Guide AG310 which explain how Ex nA certified instruments should be installed may be downloaded from the BEKA associates website, or requested from the BEKA sales office. Other models in this range include the BA327NE which has a similar specification with five 11mm high digits and a 31 segment bargraph. BEKA associates Ltd. Old Charlton Rd. Hitchin, Hertfordshire, SG5 2DA, U.K. Tel. (01462) 438301 Fax (01462) 453971 e-mail sales@beka.co.uk www.beka.co.uk

SPECIFICATION Input Current Voltage Over range indicator. DIMENSIONS (mm) 4 to 20mA Less than 1.2V at 20°C Less than 1.3V at -40°C Less than 5V with optional loop powered backlight. ±200mA or ±30V will not damage the Panel cut-out Hazardous area certification Europe ATEX Code Input parameters Ii Cert. No. International IECEx Code Parameters Ii Cert. No. Accuracy at 20°C Linear Root extracting Temperature effect on: Zero Span Series mode rejection Shows display with 4mA input Shows display with 20mA input Displays input in mA or as a % of span, has a modified function when alarms are fitted....