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RDP Electronics’ DR7 series signal amplifiers are increasingly being used in conjunction with programmable logic controllers (PLCs) in situations where enclosure space is at a premium.

PLCs typically have terminations for I/O from a number of control and measurement devices, including signal input from linear variable differential transformers (LVDTs), strain gauges, loadcells, pressure transducers and torque transducers.

DR7 amplifiers can clip on to the DIN rail alongside the PLCs, offering the benefit of short interconnecting cables and often operating from the same 24V supply.

With transducer excitation options of 1V or 3V RMS at either 3kHz or 5kHz carrier signal excitation, the DR7 provides full-range output of either +/-10V or 4-20mA from switched selectable input signal levels ranging from 20mV to 4V RMS.

RDP Electronics – experts in measurement solutions

Measurement experts RDP Electronics Ltd have 45 years experience in developing transducers for a diverse range of applications in research, prototype testing, industrial plant and machinery, or embodied in products. Examples are numerous, spanning industries that include aerospace, automotive, structural engineering and power generation. The company is responsible for the development and manufacture of a comprehensive programmme of transducer products and associated electronics to recognised international standards for accurate and reliable measurement of displacement, load, pressure and torque. Often the best solutions have a simple elegance that is possible thanks in part to the quality and high reliability of the transducers they supply. Because of their knowledge and expertise RDP’s skilled engineering team is frequently invited to propose solutions to measurement challenges.

RDP Design, manufacture and market a wide range of LVDT and other displacement transducers. LVDT Displacement transducers accurately measure position and displacement. The strength of the LVDT is in its principle of operation. As LVDT sensors are inductive, there is no electrical connection across the sensing element ensuring clean data and a long life.

The LVDT operation principle lends itself to use in extreme environments. LVDTs can be made to work submerged in sea water, in temperatures of 600°C (1100°F) in high nuclear ratiation and at pressures of up to 2000bar (30,000psi).

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