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Intrinsically safe analog input/output

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article image Turck MK33-221Ex0-HLi/24V dc isolator.

TURCK has announced the MK33-221Ex0-HLi/24V dc 2-wire loop isolator designed to energise intrinsically safe 2-wire HART compatible transducers in a hazardous area and transmit the 4-20mA signal to a non-hazardous area.

Available from Sensit , the isolator features two intrinsically safe analog inputs and two analog outputs.

The economical and functional device can also be used with 3-wire devices. Other features include LED ‘Power ON’ indication and removable terminals that streamline installation and replacement.

HART protocol, an industry standard, allows end users to gather accurate digital transducer data used for preventive maintenance and inventory.

The digital HART signals use the same two wires as the analog signal. The MK33-221Ex0-HLi/24VDC allows this signal to be passed bi-directionally between hazardous and non-hazardous areas.

The design of the isolator, which measures just 18mm wide, features hazardous area circuits which are galvanically isolated from non-hazardous area circuits, eliminating the need to use external grounding.

The MK33-221Ex0-HLi/24VDC is FM, CENELEC and CSA approved.

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