The most important characteristics of a good signal conditioner

The most efficient production facilities depend on the reliable transmission of signals between field devices and process controllers. A good quality signal conditioner is a critical tool here, as it converts these electronic signals into an easily readable format, providing users with the key data they need to keep operations running smoothly. 

What to look for

Signal conditioners have varying capabilities, depending on the supplier. There are certain characteristics to look for in a signal conditioner to ensure it’s up for the task. These features include first-class isolation quality, maximum permissible ambient temperature, minimum height and width of the module, and robust mechanisms.

• Isolation: Good isolation is one key feature, as it helps prevent interference in the signal transmission from the field device to the process control system. Choose a device from a manufacturer that has experience developing and manufacturing isolated barriers for hazardous areas. This is key because good isolation quality is essential in hazardous areas. The products used here must meet stringent standards and pass various external tests. 
• Temperature: When selecting signal conditioners, it is important to look for units with low self-heating and a relatively high permissible operating temperature. 
• Footprint: Size counts, too. Make sure the unit’s dimensions fit the space requirements. Consider both height and width. These days, a module width of as little as six millimetres is possible and, in fact, is offered by various companies. Keep the future in mind, too. When replacing or expanding, new signal conditioners must fit into the existing cabinet grid. 
• Robustness: The mechanical stability of the signal conditioner’s housing is also important. Pepperl+Fuchs carries out Elmech tests to examine the mechanical properties of the devices according to specified standards. These tests, conducted in a separate, independent testing laboratory, involve subjecting prematurely aged devices to mechanical and climatic loads, and then monitoring compliance with the relevant specification.

Where to get them

Pepperl+Fuchs manufactures a wide selection of signal conditioners with the key features users are looking for. These products are available in Canada from Process Instruments and Components Inc., a leading Canadian industrial controls distributor.

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