GE DS3820AISA1A1A

Key Parameters

• Channels: 8 differential

• Inputs: 4–20 mA or 0–10 V (fixed per suffix – verify before ordering)

• Sampling Mode: Simultaneous (all channels sampled at same instant)

• Resolution: 16-bit ADC

• Sampling Rate: Up to 1 kHz per channel (simultaneous, global)

• Accuracy: ±0.1% FS (25°C); ±0.3% over –40°C to +70°C

• Phase Mismatch: < 0.1° at 50/60 Hz (between channels)

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

• Power: 24 V DC, ≤6 W

• Diagnostics: Open-circuit, over/under-range, watchdog timer

• CMRR: >100 dB

Advantages

• Simultaneous sampling – captures all 8 channels precisely at the same moment; eliminates phase errors between signals.

• Pre-configured – no software calibration or channel setup needed; ready to use immediately.

• High-speed sampling – up to 1 kHz per channel for dynamic monitoring.

• Minimal phase mismatch – < 0.1° at 50/60 Hz ensures accurate power and vector calculations.

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

• Built-in diagnostics – alerts for broken wires and out-of-range conditions.

Applications

• Power monitoring – 3-phase voltage and current measurements (V, A, W, VAR, PF)

• Motor control – simultaneous current and voltage monitoring for efficiency calculations

• Vibration analysis – multi-axis accelerometer data capture for predictive maintenance

• Hydraulic systems – pressure and flow monitoring requiring time-correlated data

• Test & measurement – dynamic process characterization and transient recording

• Renewable energy – solar inverter and wind turbine output monitoring

Competitor Comparison

The DS3820AISA1A1A delivers premium simultaneous sampling performance with zero engineering configuration effort. Compared to standard sequential-scan modules, it eliminates phase delays that can cause significant errors in power calculations. Against competitor simultaneous modules, the DS3820AISA1A1A offers comparable performance at a lower price, with the added advantage of instant deployment – ideal for standardized systems. The fixed configuration makes the DS3820AISA1A1A the most cost-effective choice for large-scale installations with uniform signal types.

Selection Tips

• Choose DS3820AISA1A1A when you need time-coherent measurements across channels AND your signal type is fixed (4–20 mA or 0–10 V).

• Ideal for 3-phase power systems (use 3 channels for voltage, 3 for current, 2 spare) in standardized installations.

• Verify the suffix exactly matches your sensor/transmitter output – the DS3820AISA1A1A is not field-reconfigurable.

• Not suitable if you need mixed signal types on the same module – consider the software-configurable DS3820AISA instead.

• Ensure your controller can handle the 1 kHz data throughput.

Precautions

• Wiring: Use shielded twisted-pair cables to maintain signal integrity at higher sampling rates.

• Grounding: Maintain single-point grounding to avoid high-frequency noise.

• Power sequencing: Apply backplane power before field power.

• Cooling: Ensure adequate airflow in dense racks – dissipates up to 6 W.

• Data throughput: High sampling rates generate significant traffic – ensure bus bandwidth is sufficient.

• Spare: Keep one spare DS3820AISA1A1A for critical monitoring loops.

• Configuration verification: Confirm the fixed input range matches your sensors before installation – no field adjustment is possible.