BA304E
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Hazardous area Safe area Intrinsically safe for use in all gas & dust hazardous areas u Loop powered only 1.2V drop. Zener barriers or galvanic isolators u 4 digit 34mm high display. ATEX gas or ATEX gas & dust or FM, cFM & ATEX gas or INMETRO Shown with optional backlight - loop powered The BA304E loop powered 4/20mA indicator is a fourth generation field mounting instrument that is electrically and mechanically compatible with the earlier BA304D. It has a much larger full 4 digit display and guaranteed performance between -40 and 70°C. Like it’s predecessor, the BA304E is housed in a robust IP66 enclosure with a separate terminal compartment. Main application of the BA304E is to display a measured variable in meaningful engineering units within a hazardous area. The zero and span of the display are independently adjustable allowing the indicator to be calibrated to display any linear variable represented by the 4/20mA signal. A root extractor and an adjustable sixteen segment lineariser enable the indicator to display flow and non-linear variables such as tank level in linear engineering units. For weighing applications a tare function is included. The bold 34mm high 4 digit display provides maximum contrast and has a very wide viewing angle, allowing the BA304E indicator to be easily read in most lighting conditions over a wide temperature range. An optional factory fitted backlight is available for installations in poorly illuminated areas. The four digits, with three decimal points and a negative sign, may be configured to display any variable between -9999 and 9999. The robust GRP enclosure has stainless steel fittings, silicone gaskets and an armoured glass window providing IP66 protection between -40 and 70°C. Ingress and impact protection have been independently assessed by Intertek. A separate terminal compartment allows the instrument to be installed and terminated without exposing the display electronics. To further simplify field wiring and subsequent inspection, the terminal cable entries and clamping screws are forward facing. Additional terminals are provided which may be used for linking the return 4/20mA conductor and the cable screens. International intrinsic safety certification permits the BA304E to be installed throughout the world. The 4/20mA input terminals comply with the requirements for simple apparatus which, together with the low voltage drop, allow the indicator to be connected in series with most intrinsically safe 4/20mA loops. The BA304E may also be installed in dust hazardous areas. All input safety parameters are the same or greater than those for the preceding BA304D, thus allowing the BA304E to safely replace the earlier model. 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 intrinsically safe interface or wiring is required and the indicator input remain compliant with the requirements for simple apparatus. Powering from a separate supply produces a brighter backlight but requires an additional intrinsically safe interface and field 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 outputs may be independently conditioned as high or low alarms with normally open or closed outputs. Annunciators on the display show the status of both alarm outputs. versions have IECEx All certification. u P66 GRP enclosure with I separate terminal compartment. u ptional backlight, O alarms & external keypad. Reliability is ensured by component conformal coating, protection from incorrect connection and radio frequency interference. The indicator has been subjected to extensive vibration testing and is supported by a three year guarantee. Other field mounting models in this range include the BA324E which has a similar specification but has a five digit 29mm high display plus 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.u

Input Current 4 to 20mA Voltage Less than 1.2V at 20°C Less than 1.3V at –40°C than 5V with optional loop powered backlight Less Overrange ±200mA or ±30V will not damage the indicator Push buttons (Function in display mode) ▼ Shows display with 4mA input ▲ Shows display with 20mA input ‘P’ Displays input in mA or a % of span, has a modified function when alarms are fitted. ‘E’ Used for tare function Removable cover provides access to controls Output parameters Cert. No. USA FM Standard Code Standard Code File International IECEx Code Cert. No Ex ia IIC T5 Ga Dust option, see Ex ia IIIC...