GE DS3820AIQA1A1A

Key Parameters

• Channels: 8 differential, individually isolated

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

• Resolution: 16-bit ADC

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

• Isolation: 1500 V RMS per-channel (channel-to-channel and field-to-logic)

• Power: 24 V DC, ≤8 W

• CMRR: >110 dB

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

Advantages

• Per-channel isolation – a fault on one channel (surge, short, ground loop) won’t affect others or the backplane.

• Pre-configured – no software calibration needed; plug-and-play for fixed signal types.

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

• Superior noise rejection – CMRR > 110 dB, ideal for high-EMI environments with varying ground potentials.

• Full diagnostics – detects open wires, shorts, and out-of-range per channel.

Applications

• Power plants – monitoring sensors with different ground potentials

• Oil refineries – distributed field sensors across large sites

• Mining & metals – high-voltage motor drive areas with significant electrical noise

• Medical/pharma – critical parameters requiring fail-safe channel separation

• HVAC – sensors on different power phases in large buildings

Competitor Comparison

The DS3820AIQA1A1A delivers premium per-channel isolation at a lower engineering cost by eliminating configuration time. Compared to group-isolated modules, it prevents single-channel faults from propagating. Against competitor premium cards with software configurability, the DS3820AIQA1A1A saves cost while maintaining the same core isolation and diagnostic capabilities.

Selection Tips

• Choose DS3820AIQA1A1A when sensors are distributed across different ground potentials AND your signal type is fixed (4–20 mA or 0–10 V).

• Verify the suffix exactly matches your sensor output – the DS3820AIQA1A1A is not field-reconfigurable.

• Ideal for systems with frequent sensor shorts or high common-mode voltages.

• Not suitable if you need mixed signal types on the same module – consider the software-configurable DS3820AIQA instead.

Precautions

• Wiring: Use individually shielded cables per channel to maintain isolation integrity.

• Power budget: Draws up to 8 W – ensure rack power supply has sufficient headroom.

• Polarity: No reverse protection – double-check wiring.

• Cooling: Higher power dissipation requires adequate airflow in dense racks.

• Grounding: Do not tie isolated commons together; maintain separate returns per channel.

• Spare: Keep one spare DS3820AIQA1A1A – per-channel modules have longer lead times.