LD4

2 Channels, 28 Vrms Input, 10 kHz-20 kHz

A linear variable differential transformer (LVDT) is a type of electrical transformer/transducer used for measuring linear displacement (position). A counterpart to this device used for measuring rotary displacement is called a rotary variable differential transformer (RVDT). The RVDT is like an LVDT in that it measures a positional displacement, however, the displacement, which is still a linear proportional function, is based on rotary instead of linear positional movement.

Both types provide output signals (voltages) as a proportional linear function based upon an AC reference source. The AC Reference source applied at the transformer primary winding causes a magnetic flux generated on the transformer secondary windings by a moveable core, which causes output signal(s) proportional to the linear displacement position being gauged.

With isolated excitation and signal input covering 2, 3, or 4-wire transducer interfaces and a normalized digital position word based on a percentage of full-scale travel, these modules can interface to virtually any type LVDT or RVDT transformer.

Features

• Signal, reference and frequency measurements
• Signal under-voltage and over-voltage detection
• Reference under-voltage and over-voltage detection
• Support an optional, programmable AC excitation supply
• All channels have continuous background Built-In-Test (BIT)
• Extended LVDT FIFO buffering capabilities for greater incoming data storage/management
• Programmable FIFO buffer thresholds