GE DS3820PSWA1C1A

Key Parameters

• Channels: 4 isolated analog inputs

• Sensor Type: Pt100 (2‑wire, 3‑wire, or 4‑wire – software‑configurable per channel)

• Resolution: 24‑bit ADC

• Accuracy: ±0.05°C (Pt100, 25°C); ±0.2°C over –40°C to +70°C

• Excitation Current: Software‑selectable 0.1 mA, 0.5 mA, 1 mA (per channel)

• Excitation Power: 24 V DC (field‑supplied) – requires external 24 V DC supply for sensor excitation

• Module Power Input: 18–72 V DC (wide‑range) – compatible with 24 V, 48 V, and 60 V DC systems

• Lead Resistance Compensation: Automatic for 3‑wire and 4‑wire configurations

• Measurement Range: –200°C to +850°C

• Sampling Rate: Up to 50 Hz per channel (with 50/60 Hz noise rejection)

• Diagnostics: Open‑circuit detection, short‑circuit detection, over‑range/under‑range, signal‑loss detection, per‑channel LED status

• Isolation: 1500 V RMS (field‑to‑backplane); 500 V RMS between channels (per‑channel isolation)

• Terminal Type: Screw‑type – per suffix “A1C1A”

• Power Consumption: ≤4.5 W (module logic + sensor excitation)

• Operating Temperature: –40°C to +70°C

Advantages

• Pre‑configured – fixed terminal configuration; reduces setup time and engineering effort.

• Wide‑range DC power input (18–72 V) – compatible with 24 V, 48 V, and 60 V DC systems; eliminates the need for separate power converters in non‑standard installations.

• Premium accuracy – ±0.05°C; high precision for demanding applications.

• 24‑bit resolution – provides superior measurement fidelity.

• Per‑channel isolation – 500 V between channels; prevents ground loops and cross‑channel interference.

• Automatic lead compensation – for 3‑wire/4‑wire RTDs, cancels lead resistance errors for accurate temperature readings.

• Software‑configurable per channel – wire configuration and excitation current independently settable.

• Built‑in linearization – provides direct temperature readout in °C or °F; no scaling required.

• Enhanced diagnostics – includes signal‑loss detection for proactive maintenance.

• Open/short detection – detects broken wires or sensor shorts instantly.

• Hot‑swappable – replace without rack power‑down.

• Wide measurement range – –200°C to +850°C covers most industrial applications.

Applications

• Telecom & data centers – temperature monitoring in 48 V DC environments

• Rail & transportation – onboard temperature monitoring in 24–72 V DC systems

• Renewable energy – solar and wind installations with 48 V or 60 V DC bus systems

• Industrial machinery – equipment with non‑standard DC power buses

• Off‑grid installations – battery‑powered systems with variable DC voltages

• Oil & gas – remote monitoring with solar‑powered 24 V or 48 V systems

• HVAC – building‑wide temperature monitoring

• Pharmaceutical manufacturing – fermenter, reactor, and storage temperature control

Competitor Comparison

The DS3820PSWA1C1A is the fixed‑configuration, wide‑range DC power input Pt100 module. Compared to the configurable DS3820PSWA, it offers plug‑and‑play simplicity while maintaining the same 18–72 V DC power flexibility, ±0.05°C accuracy, and 50 Hz sampling. Against standard 24 V‑only Pt100 modules, it eliminates the need for separate power converters in 48 V or 60 V systems – critical for telecom, rail, and renewable energy applications. For temperature monitoring in non‑standard DC power environments with minimal engineering effort, the DS3820PSWA1C1A delivers the most flexible, cost‑effective, and deployment‑ready solution.

Selection Tips

• Choose DS3820PSWA1C1A when your plant operates on 24 V, 48 V, or 60 V DC power and you need Pt100 temperature monitoring with screw‑terminal wiring and plug‑and‑play simplicity.

• Ideal for telecom, rail, renewable energy, off‑grid installations, and industrial machinery with non‑standard DC power buses.

• Verify the wire configuration (2‑wire, 3‑wire, or 4‑wire) – software‑configurable per channel.

• Confirm the terminal configuration (1C1A) matches your panel wiring requirements.

• For 2‑wire sensors, lead resistance adds error – use 3‑wire or 4‑wire for accurate measurements.

• If vibration resistance is critical, consider a spring‑clamp variant (e.g., DS3820PSWB series) instead.

• If your sensors are located far from the control panel (>100 m), consider a line‑powered variant (e.g., DS3820PSLB series).

• Not suitable for Pt1000, Ni RTDs, or thermocouples – use dedicated modules.

• Ensure your PLC/DCS can handle the data format from DS3820PSWA1C1A.

Precautions

• Power input range: The DS3820PSWA1C1A accepts 18–72 V DC – do not exceed 72 V DC to avoid damage.

• Lead resistance: For 2‑wire sensors, lead resistance directly adds error – use 3‑wire or 4‑wire for accurate measurements. The DS3820PSWA1C1A compensates for 3‑wire/4‑wire automatically.

• Excitation current: Higher currents (1 mA) produce self‑heating errors in small Pt100 elements – use 0.1 mA or 0.5 mA for sensitive sensors.

• Wiring: Use shielded twisted‑pair cables; ground shield at module end only. For 4‑wire, use separate pairs for excitation and sense leads.

• External 24 V supply: Ensure the field supply has sufficient capacity for the excitation current of all channels (up to 4 mA total at 1 mA per channel).

• Signal‑loss detection: Requires minimum sensor impedance – very low‑impedance sensors may not trigger detection.

• Power sequencing: Apply backplane power before field power.

• Calibration: Perform periodic calibration using precision resistors to maintain accuracy.

• Spare: Keep one spare DS3820PSWA1C1A for critical temperature loops – the fixed configuration is typically stocked for quick replacement.