Compact versatile interfaces

Turck has developed the IMX12 device series of Ex isolated barriers and Ex analogue signal isolators. With its compact 12.5mm housing and an input range from 10 to 30Vdc, the series is said to offer maximum signal density. The series also feature two-channel temperature measuring amplifiers in four-wire PT100 circuits to be implemented via up to four two-pole terminals – each on the Ex and non-Ex side.

The IMX12-DI isolating switching amplifier offers input frequencies up to 15,000Hz, previously only possible with special frequency transducers, which is said to allow precise measurement without signal conversion.

The electronic design enables the effects of factors such as temperature or voltage fluctuations to be reduced on the IMX12-AI Ex analogue signal isolator. The effect of the interface device on the overall performance of a complete measuring circuit is thus considerably less than usual.

The devices have been developed and certified in compliance with the requirements of IEC61508 and can be used in functional safety loops up to SIL2. All device types have also been individually tested and approved according to international Ex standards.