GE DS3820PSCC

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: ±0.03°C (Pt100, 25°C); ±0.12°C over –40°C to +70°C

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

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

• Measurement Range: –200°C to +850°C

• EMC/Noise Rejection: Enhanced CMRR > 120 dB, built‑in 50/60 Hz digital filtering

• 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)

• Sampling Rate: Up to 50 Hz per channel (with noise rejection filtering enabled)

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

• Power: 24 V DC backplane power, ≤4 W

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

Advantages

• Screw‑type terminals – familiar and secure wiring for traditional panel installations; offers reliable connections in low‑ to moderate‑vibration environments.

• Enhanced noise immunity – CMRR > 120 dB and advanced digital filtering; ideal for installations near VFDs, inverters, and high‑power switching equipment.

• Premium accuracy – ±0.03°C; the highest precision Pt100 module in the family.

• 24‑bit resolution – provides superior measurement fidelity for demanding applications.

• 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

• VFD‑controlled motor systems – bearing and winding temperature monitoring near variable frequency drives

• Steel mills & foundries – temperature monitoring near high‑power equipment

• Power generation – turbine bearing and generator temperature monitoring in substation environments

• Oil & gas – pipeline and compressor temperature monitoring with surge protection

• Semiconductor manufacturing – precision chamber temperature control with high noise immunity

• Metrology & calibration labs – high‑precision temperature measurement and sensor verification

• Chemical processing – reactor and pipeline temperature monitoring in high‑EMI areas

• Research & development – experimental thermal analysis in high‑EMI labs

Competitor Comparison

The DS3820PSCC is the screw‑terminal variant of the EMI‑optimized premium Pt100 input module with ±0.03°C accuracy. Compared to the spring‑clamp DS3820PSCB1A1A, it offers traditional screw‑terminal wiring for panels where vibration is less of a concern, while maintaining the same superior noise rejection (CMRR > 120 dB) and highest accuracy. Against standard Pt100 modules, it provides superior resolution (24‑bit vs. 16‑bit), enhanced diagnostics, and EMI resilience. For demanding Pt100 applications requiring both the highest accuracy and the highest noise immunity with traditional screw‑terminal wiring, the DS3820PSCC delivers the best‑in‑class solution.

Selection Tips

• Choose DS3820PSCC when you need maximum precision (±0.03°C) for Pt100 temperature measurement with screw‑terminal wiring and superior EMI noise immunity.

• Ideal for VFD‑heavy installations, substations, steel mills, power generation, oil & gas, and chemical processing applications where electrical noise is a significant concern.

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

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

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

• Ensure your PLC/DCS can handle 24‑bit data resolution from the DS3820PSCC.

Precautions

• Lead resistance: For 2‑wire sensors, lead resistance directly adds error – use 3‑wire or 4‑wire for accurate measurements. The DS3820PSCC 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. Enhanced EMI protection requires proper grounding to achieve >120 dB CMRR.

• 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 ±0.03°C accuracy – the DS3820PSCC requires regular verification to maintain specification.

• Spare: Keep one spare DS3820PSCC for critical high‑precision loops – the EMI‑optimized screw‑terminal variant may have longer lead times.