LDM-1000, AC LVDT Conditioner


- 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 stands out as a comprehensive solution for LVDT/RVDT signal conditioning within industrial settings, particularly where DIN rail mounting is preferred. This module supports a broad operational voltage range of 10 to 30VDC and caters to a variety of position control systems by providing 4 to 20mA and VDC outputs. Key features include adjustability for zero, span, and phase to ensure precise calibration, alongside selectable excitation frequencies of 2.5, 5, and 10kHz to match the needs of various transducers.
Its design incorporates a low noise, 3-pole Butterworth filter for optimal signal clarity, along with master/slave capability for synchronizing multiple units, thus eliminating potential beat frequencies and cross-talk between sensors. The LDM-1000 is engineered to work efficiently with 4, 5, and 6-wire LVDTs/RVDTs, even those with very low input impedance, ensuring broad compatibility across sensor types.
The module offers versatile input/output options to meet diverse PLC and analog I/O requirements. These include single-ended voltage outputs with 100% zero suppression for simplified programming, bipolar voltage output for maximizing A/D bit usage in high-resolution applications, and a 4-20mA current output ideal for long signal runs or environments with significant noise potential. The 4-20mA loop benefits from an internal power supply, further enhancing the module's utility and performance in complex industrial setups.
DIMENSIONS AND INTERNAL VIEW
Output Type | 0 - 5 V DC |
0 - 10 V DC | |
±5 V DC | |
4 - 20 mA | |
Supply Power | 18 - 30 V DC |
- Gas and steam turbine control systems
- Process control systems
- Reeler/dereeler control systems
- Automotive test track instrumentation
- Paper head box control
LDM-1000 Datasheet Datasheet |
- Strain Gauge & Potentiometer Input Amplifier
- 50 V Continuous Isolation
- Accuracy: ± 0.05%
- DIN Rail Mounted
- In-Line Amplifier (Option)
- Aluminum Housing
- Protection Class: IP40
Input Type | 0 - 10 mV DC, 0 - 100 mV DC, 0 - 1 V DC, 0 - 10 V DC, ±10 V DC, Potentiometer, Strain Gauge |
# of Inputs | 1 |
Output Type | ±5 V DC, ±10 V DC, 0 - 20 mA, 4 - 20 mA |
Max Bandwidth | 1 kHz, 4 kHz |
Excitation | 2.5 V DC, 5 V DC, 10 V DC |
Isolation | Yes |
- Accuracy: ± 0.01%
- DIN Rail Mounted
- Protection Class: IP31
- Thermal Shift : 25 ppm of F.S.
Input Type | ±10 mV DC, ±30 mV DC, ±50 mV DC, ±100 mV DC |
# of Inputs | 1 |
Output Type | ±10 V DC, 4 - 20 mA |
Max Bandwidth | 1 kHz, 10 kHz |
Excitation | 5 V DC, 10 V DC |
Supply Power | 14 - 26 V DC |
- 480 calibrated input ranges, +/- 0.02 to +/- 200 V or +/- 0.1 to +/- 100mA (unipolar/bipolar)
- Output Signals: +/- 20 mA, +/- 10V, or 4…20 mA
- Flexible set-up through onboard dipswitches
- Galvanically isolated to 1000 V AC/DC (input and output channels), with test voltage of 5.4 kV AC
- 10kHz Cut-off frequency
- Response Time of 70 microseconds (T90)
- Compact, 22.5 mm wide din-rail mountable housing
- Broad-range power supply 20 … 253 V AC/DC
Input Type | 0 - 10 mV DC, 0 - 50 mV DC, 0 - 100 mV DC, 0 - 1 V DC, ±5 V DC, ±10 V DC, ±20 V DC |
Output Type | ±10 V DC, 4 - 20 mA, ±20 mA |
Max Bandwidth | 10 kHz |
Isolation | Yes |
Supply Power | 20 - 28 V DC, 80 - 250 V AC |
- Accepts signal inputs from 3-wire voltage sensors (Hall-effect & proximity),
- Accepts 2-wire voltage signals or digital input signals from encoders.
- Dynamic monitoring, comparing chns, reverse rotation, creep and standstill.
- Input Voltage Ranges from 20 mVrms to 80 Vrms
- Input Frequency capable from 0.025 Hz up to 35 kHz (200kHz for Digital Pulse)
- Six configurable high speed relays (10 ms response time) for multiple speed functions
- Three highly accurate analog outputs (4-20 mA or optional 2 – 10 V)
- Three Frequency Signal Outputs, (open collector, max. 24 V, 100 ma)
Interface | TCP/IP, RS-485 |
Input Type | 20 milli Vrms, 0 - 10 V AC, 80 Vrms, Frequency |
# of Inputs | 3 |
Output Type | 2 - 10 V DC, 4 - 20 mA |
Max Bandwidth | 5 kHz |
Excitation | 24 V DC |
- Accepts signal inputs from 3-wire voltage sensors (Hall-effect & proximity),
- Accepts 2-wire voltage signals or digital input signals from encoders.
- Dynamic monitoring, comparing chns, reverse rotation, creep and standstill.
- Input Voltage Ranges from 20 mVrms to 80 Vrms
- Input Frequency capable from 0.025 Hz up to 35 kHz (200kHz for Digital Pulse)
- Four configurable high speed relays (10 ms response time) for multiple speed functions
- Two highly accurate analog outputs (4-20 mA or optional 2 – 10 V)
- Two Frequency Signal Outputs, (open collector, max. 24 V, 100 ma)
Interface | TCP/IP, RS-485 |
Input Type | 20 milli Vrms, 0 - 10 V AC, 80 Vrms, Frequency |
# of Inputs | 2 |
Output Type | 2 - 10 V DC, 4 - 20 mA |
Max Bandwidth | 10 kHz |
Excitation | 24 V DC |