Operator Interfaces, Switches & Relays


IS relays for hazardous areas

June 2009 Operator Interfaces, Switches & Relays

RTK Instruments is offering its DA149 intrinsically safe relays. These relays allow control signals and other data to be exchanged between items of equipment in hazardous areas and between hazardous area and safe area equipment. The range consists of four models, two of which are designed for safe area location and two that can be located within hazardous areas. These slim line units are suitable for universal DIN-rail mounting.

Requiring very little power, the DA149 relays do not affect operation of other connected equipment. The inputs and outputs of these relays are certified equivalent to ‘simple apparatus’, which means they can be included in any intrinsically safe loop without further certification. The inputs and outputs are galvanically isolated so the relays do not require an earth connection.

For more information contact KV Dahya, Extech Safety Systems, +27 (0)11 791 6000, [email protected], www.extech.co.za



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