Signal Conditioning

LDM-1000 Signal Conditioner

LDM-1000 Signal Conditioner

The LDM-1000 is an extremely versatile and popular LVDT/RVDT signal conditioning module and the perfect choice for industrial applications requiring the DIN standard rail mount. The LDM-1000 provides everything you will need for accurately interfacing an AC operated Linear or Rotary Variable Differential Transformer to your industrial position control system.

The LDM-1000 was designed with maximum sensor/system compatibility in mind. A wide range of gains, excitation voltages and frequencies ensure compatibility with virtually all LVDT and RVDT type transducers. A full-wave synchronous demodulator eliminates quadrature and harmonics to maximize external noise rejection.

The LDM-1000 also provides several different input/output options to accommodate varying PLC and analog I/O requirements:

Single-ended voltage outputs with the use of 100% zero suppression to maximize the sensor stroke utilization while simplifying programming (no need to
deal with sign)

Bipolar voltage output to maximize A/D bit usage with most PLC analog input modules, for applications requiring high resolution

4-20mA current output for applications requiring long signal runs or where noise immunity may be an issue. The 4-20mA loop is driven by an internal power supply,
provided by the LDM-1000.

Finally, the frequency response is internally selectable and so is the master/slave function which allows synchronization of multiple LDM-1000 modules to prevent beat frequencies and cross talk between transducers.



  • 10 to 30VDC operation
  • Standard DIN rail form factor
  • 4 to 20mA and VDC outputs
  • Zero, span and phase adjustable
  • 2.5, 5 and 10kHz excitation frequencies
  • Low noise, 3-pole Butterworth filter
  • Master/slave capability
  • Compatible with 4, 5 & 6-wire LVDTs/RVDTs
  • Works with very low input impedance LVDTs and RVDTs



  • Standard DIN rail form factor
  • Voltage and current output signals
  • Phase correction
  • Status LED’s for power and loop integrity
  • Multiple LVDT master/slave capability



  • Gas and steam turbine control systems
  • Process control systems
  • Reeler/dereeler control systems
  • Automotive test trackinstrumentation
  • Paper head box control