LDM-1000 LVDT/RVDT Signal Conditioning Module SPECIFICATIONS 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 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 FEATURES interfacing an AC operated Linear or Rotary Variable Standard DIN rail form factor Differential Transformer to your industrial position control system. Voltage and current output signals Phase correction The LDM-1000 was designed with maximum sensor/system Status LEDs for power and loop compatibility in mind. A wide range of gains, excitation voltages integrity and frequencies ensure compatibility with virtually all LVDT and Multiple LVDT master/slave RVDT type transducers. A full-wave synchronous demodulator capability eliminates quadrature and harmonics to maximize external noise rejection. APPLICATIONS The LDM-1000 also provides several different input/output options to accommodate varying PLC and analog I/O Gas and steam turbine control requirements: systems Single-ended voltage outputs with the use of 100% Process control systems zero suppression to maximize the sensor stroke Reeler/dereeler control systems utilization while simplifying programming (no need to Automotive test track deal with sign) instrumentation Bipolar voltage output to maximize A/D bit usage with Paper head box control 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. SENSOR SOLUTIONS /// LDM-1000 Rev 8 06/2017 Page 1 LDM-1000 LVDT/RVDT Signal Conditioning Module PERFORMANCE SPECIFICATIONS ELECTRICAL SPECIFICATIONS Supply voltage 18 to 30VDC or 10 to 18VDC (jumper selectable, 18 to 30VDC as shipped) Supply current 65mA maximum Output types and ranges 5VDC, 0 to 5VDC, 0 to 10VDC, and 4 to 20mA (DIP switch selectable, 5VDC as shipped) Temp. coefficient of output 0.02% of FSO per F 0.036% of FSO per C over the operating temperature range Voltage output noise & ripple 5mV RMS maximum Current output noise & ripple 25A RMS maximum 700 maximum (with 18 to 30VDC supply voltage) Current loop resistance Frequency response 250 or 1000Hz -3 dB (3-pole Butterworth, DIP switch selectable, 250Hz as shipped) Non-linearity 0.02% of FSO Input sensitivity range 0.05 to 2.50 VRMS Transducer excitation Voltage 1 or 3 VRMS (DIP switch selectable 3VRMS as shipped, with 18 to 30VDC supply voltage only) Current 25mA RMS Frequency 2.5, 5 or 10kHz (DIP switch selectable, 2.5kHz as shipped) Transducer requirements Transducer type LVDT or RVDT with 4, 5 or 6 electrical connections LVDT/RVDT input impedance 50 minimum 1 VRMS excitation 150 minimum 3 VRMS LVDT/RVDT full scale output 0.05 to 2.50 VRMS ENVIRONMENTAL AND MECHANICAL SPECIFICATIONS Operating temperature range -13F to +185F -25C to 85C Storage temperature range -67F to +257F -55C to 125C Mounting Standard DIN-3 rail mount Size 3.90 99.0 high x 0.89 22.5 wide x 4.51 114.5 Deep Wire terminal size 24 to 12 AWG 0.2 to 2.5mm IEC 60529 rating IP60 Notes: All values are nominal unless otherwise noted Dimensions are in inch mm FSO (Full Scale Output) is the largest absolute value of the outputs measured at the range ends SENSOR SOLUTIONS /// LDM-1000 Rev 8 06/2017 Page 2