LWT DSC Digital Signal Conditioner
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LWT DSC
Standalone Digital Signal Conditioner for AC LVDTs
DIN-Rail Mounted Digital Signal Conditioner for AC LVDTs
The LWT DSC is a standalone digital signal conditioner designed for AC LVDTs and inductive sensors. It provides software-configurable excitation, precision signal conditioning, and simultaneous analog voltage and current outputs with RS-485 Modbus RTU communication. With high accuracy, thermal stability, and comprehensive fault diagnostics, it is ideal for industrial displacement measurement applications.
Key Features
- Software-configurable excitation: 0 to 4.5 Vrms, 1 Hz to 10 kHz
- 9 simultaneous analog voltage outputs: 0–2.5V, 0–5V, 1–5V, 0–10V, ±5V, ±10V, 0–4V, 0–9V, 0.5–4.5V, 0.5–9.5V
- 2 current loop outputs: 0–20 mA or 4–20 mA, active sourcing
- Isolated RS-485 Modbus RTU with 16-address multi-drop
- High accuracy: ≤ ±0.025% of Full Scale Output (FSO)
- Thermal stability: ±0.0025% of FSO/°C
- Comprehensive fault diagnostics: Open, shorted, grounded windings, disconnected cables
- Front-panel push-button zero/full-scale calibration
- User-enabled cybersecurity parameter lock
- UL94-V0 flame-retarded housing
Product Identification
Model / Part Number
LWT DSC
Product Type
Standalone Digital Signal Conditioner for AC LVDTs / Inductive Sensors
Mounting
DIN-rail mount (35 mm)
Housing Material
UL94-V0 Flame Retarded Graded Material
Termination
Pluggable screw terminal blocks (signal, power, RS-485)
Mechanical Specification
Overall length
112.5 mm
Overall width (base)
111.18 mm
Overall height
105.33 mm
Overall depth
22.6 mm
Mounting method
35 mm DIN rail clip, integrated to housing
Ingress protection
Panel / cabinet mounting (indoor use)
Electrical & Performance Specification
Supply voltage
+15 to +30 VDC (24 V nominal)
Max current draw
250 mA max at 24 VDC
Max loop resistance
850 Ω (with 24 VDC supply)
Analog voltage outputs
9 simultaneous; 0–2.5V, 0–5V, 1–5V, 0–10V, ±5V, ±10V, 0–4V, 0–9V, 0.5–4.5V, 0.5–9.5V
Current loop outputs
2 selectable; 0–20 mA or 4–20 mA, active sourcing
Digital interface
1x isolated RS-485, half-duplex, 2-wire, 16-address multi-drop
Excitation voltage
0 to 4.5 Vrms max, 3.0 Vrms nominal, software-configurable
Excitation frequency
1 Hz to 10 kHz, software-configurable in 1 Hz increments
Sensor drive topology
Single-ended or push-pull differential, selectable
Sensor output range
50 to 5000 mVrms at full-scale displacement
Linearity error
≤ ±0.025% of Full Scale Output (FSO)
Thermal stability
±0.0025% of FSO/°C, combined zero and span shift
Frequency response
10% of excitation frequency (normal); 10 Hz low-noise mode, adjustable
Output noise & ripple
≤ 1 mVrms (voltage); ≤ 2 µArms (current loop)
Operating temperature
-20 °C to +85 °C
Calibration
Front-panel push-button (zero / full-scale) or software
Fault / diagnostic
Open, shorted, or grounded windings; disconnected cables; analog output faults
Fault indication
Flashing LED; 30 mA fault current on affected channel
Security
User-enabled cybersecurity parameter lock