GE DS3820PS5B

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: ±0.04°C (Pt100, 25°C); ±0.15°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 Protection: Enhanced filtering, CMRR > 120 dB, surge protection (4 kV)

• 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 50/60 Hz noise rejection)

• Terminal Type: Spring-clamp (tool-free, vibration-resistant) – per suffix “B”

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

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

Advantages

• Enhanced EMC protection – superior noise rejection (CMRR > 120 dB) and 4 kV surge protection; ideal for VFD-heavy and high-EMI environments.

• Spring-clamp terminals – tool-free push-in wiring; reduces installation time; highly resistant to vibration loosening – critical for transportation, marine, and heavy industrial applications.

• Premium accuracy – ±0.04°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.

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

• Built-in linearization – provides direct temperature readout in °C or °F.

• 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.

Applications

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

• Transportation & rail – traction motor temperature monitoring with vibration-resistant wiring

• Marine & offshore – engine room temperature monitoring in high-EMI environments

• 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

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

Competitor Comparison

The DS3820PS5B is the EMC-hardened, spring-clamp variant of the premium Pt100 input module. Compared to the standard DS3820PS1B, it offers superior noise rejection (CMRR > 120 dB) and 4 kV surge protection – essential for VFD-heavy and high-EMI environments – while sacrificing only a small amount of accuracy (±0.04°C vs ±0.03°C). Against competitor premium modules, the DS3820PS5B offers comparable accuracy with superior EMC protection and vibration-resistant wiring at a lower cost. For demanding Pt100 applications in high-interference and high-vibration environments, the DS3820PS5B delivers the most ruggedized and reliable solution.

Selection Tips

• Choose DS3820PS5B when you need high-precision Pt100 measurement with enhanced EMC protection and vibration-resistant spring-clamp wiring – ideal for VFD-heavy, substation, and industrial environments.

• Ideal for steel mills, power generation, oil & gas, and transportation applications with significant electrical noise.

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

• Confirm spring-clamp terminals accept your wire gauge (typically 0.2–2.5 mm² / 24–14 AWG) and consider using ferrules for stranded wire.

• 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 DS3820PS5B.

Precautions

• Wire preparation: Use only solid or stranded wire with proper ferrule termination – bare stranded wire may not make reliable contact in spring-clamp terminals.

• Wire insertion: Insert wire fully into the spring-clamp opening until it stops; pull gently to verify secure connection.

• Lead resistance: For 2-wire sensors, lead resistance directly adds error – use 3-wire or 4-wire for accurate measurements. The DS3820PS5B compensates for 3-wire/4-wire automatically.

• Excitation current: Higher currents (1 mA) produce self-heating errors – use 0.1 mA or 0.5 mA for sensitive sensors.

• Wiring: Use shielded twisted-pair cables; ground shield at module end only. Enhanced EMC protection requires proper grounding to function effectively.

• Surge protection: The DS3820PS5B provides 4 kV surge protection – ensure proper grounding to achieve this rating.

• 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 DS3820PS5B for critical high-precision loops – the EMC-hardened variant may have longer lead times. Also stock replacement ferrules for spring-clamp terminals.