ISpac 9147 series Ex i isolators

Wednesday, 19 September, 2012 | Supplied by: R. STAHL Australia Pty Ltd


R. Stahl has extended its ISpac family of Ex i isolators with the 9147 series. The transmitter supply units enable the use of vibration sensors in hazardous areas. These sensors for condition monitoring of plants and machines allow users to detect any damage at an early stage.

Most vibration sensors are designed with the protection class Intrinsic Safety (Ex i) and require the use of isolators. The 9147-type supply units support a wide range of these sensors and transmitters.

An easily accessible rotary switch allows for quick and easy configuration. Two versions are available: a one- and a two-channel version. The two-channel version requires 50% less space in the switching cabinet, which may reduce indirect installation costs. An optimal signal-to-noise ratio ensures precise signal transmission.

Like all ISpac isolators, the modules are available as single units on a DIN rail, with a common power supply and collective error message via the pac-Bus, or in pac-Carriers. The pac-Carriers enable factory prewiring of plants, thus facilitating final mounting or retrofitting at a later date and ensuring error-free installation of the isolators.

The detection of problematic vibrations is important in condition monitoring of process plants with rotating parts. By diagnosing danger before a failure could happen, it helps prevent plant shutdowns. Generally, vibration detection is successful earlier than temperature, speed or acoustic measuring. Complete condition monitoring for machines also includes temperature sensors, discrete signals and 4-20 mA signals.

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