GE DS3820AIRA1A1A

Key Parameters

• Channels: 8 differential

• Sensor Type: Pt100 (3-wire typical – verify suffix for exact configuration)

• Excitation Current: Fixed per suffix (0.5 mA or 1 mA typical)

• Resolution: 16-bit ADC with ratiometric conversion

• Accuracy: ±0.05% of reading + ±0.1°C (Pt100, 25°C); ±0.2°C over –40°C to +70°C

• Lead Compensation: Automatic for 3-wire (and 4-wire if supported per suffix)

• Isolation: 1500 V RMS field-to-logic (group isolated)

• Power: 24 V DC, ≤6 W

• Diagnostics: Open-circuit detection, short-circuit detection, wire-break monitoring

Advantages

• Pre-configured for Pt100 – no software configuration needed; ready to use out of the box.

• Direct sensor connection – eliminates external transmitters, saving panel space and cost.

• Automatic lead compensation – cancels lead resistance errors for accurate long-cable measurements.

• Ratiometric measurement – immune to power supply drift for stable readings.

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

• Built-in diagnostics – instant alerts for broken wires or sensor shorts.

Applications

• HVAC systems – duct and return air temperature monitoring

• Pharmaceutical manufacturing – fermenter and storage temperature control

• Food processing – oven and kiln temperature profiling

• Power generation – bearing and winding temperature monitoring

• Semiconductor fabrication – precision chamber temperature sensing

Competitor Comparison

The DS3820AIRA1A1A offers the lowest total installed cost for Pt100 applications by eliminating configuration labor and external transmitters. Compared to configurable competitor modules, it trades flexibility for simplicity – ideal for high-volume, standard Pt100 installations. Against traditional analog inputs with transmitters, the DS3820AIRA1A1A delivers superior accuracy and reliability by reducing component count and failure points. For plants standardizing on Pt100 sensors, the DS3820AIRA1A1A is the most economical and maintenance-friendly choice.

Selection Tips

• Choose DS3820AIRA1A1A if your application uses standard Pt100 (3-wire) sensors and you want minimum configuration effort.

• Perfect for large-scale installations with hundreds of identical temperature points.

• Verify the exact suffix matches your sensor type and wire configuration – the DS3820AIRA1A1A is not field-reconfigurable.

• Not suitable for thermocouples, other RTD types (Pt1000, Ni), or mixed sensor types.

• If you need flexibility for different sensor types, consider the software-configurable DS3820AIRA version.

Precautions

• Lead resistance: For 2-wire RTDs, lead resistance adds error – ensure your sensors are 3-wire to use automatic compensation.

• Wiring: Use shielded twisted-pair cables; maintain proper pairing for excitation and sense leads.

• Excitation current: Self-heating may occur with small RTD elements – check your sensor’s power rating.

• Power budget: Dissipates up to 6 W – ensure adequate rack cooling.

• Polarity: Double-check wiring polarity to avoid reversed excitation.

• Spare: Keep one spare DS3820AIRA1A1A for critical temperature loops – fixed-configuration modules are typically stocked for quick replacement.