IS serial text displays with Modbus
February 2006
Operator Interfaces, Switches & Relays
BEKA Associates is offering its enhanced BA484D and BA488C intrinsically safe serial text displays. These instruments, which display process variables, text and simple graphics in hazardous areas, now include Modbus protocol and nine standard format display screens showing one, two, three or four variables with optional bar graphs.
The addition of Modbus protocol allows these serial text displays to be easily interfaced with the considerable range of process instrumentation having a Modbus port. Most applications can be satisfied by one of the nine new standard display screen formats, which include units of measurement, tag identification and optional bar graphs, thus eliminating the need to design a custom screen.
For applications requiring a dedicated display screen, BEKA protocol enables text to be written anywhere on the screen in five different font sizes, together with lines, boxes and simple bitmap graphics. A free instrument stimulator that runs on a personal computer demonstrates the capabilities of the serial text display and the associated programming utilities enable application software to be developed without any additional hardware.
The recent enhancement also includes the addition of two advanced features, pattern matching and scripting. Pattern matching enables ASCII data from instruments such as weighing systems and bar code readers, which are primarily intended for printing, to be decoded and displayed by the text display. Scripts are a sequence of commands downloaded and stored in the serial text displays non-volatile memory that can be executed without intervention from the host.
Both serial text displays have ATEX Group II Category IG (EEx ia IIC T5) certification and are ideal for simple machine and process control applications. The instruments include pushbuttons which may be used for returning operator acknowledgements.
The field mounting BA484D has an IP66 GRP enclosure and has been certified for use in both flammable gases and combustible dusts. The panel mounting BA488C has an IP66 front panel and has been certified for use in flammable gases.
For more information contact K V Dahya, Extech Safety Systems, 011 791 6000, [email protected]
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