GE DS3820MAUC

Key Parameters

• Channels: 4 analog inputs + 2 analog outputs (total 6 channels)

• Input Types: 4–20 mA, 0–10 V, ±10 V (software-configurable per channel)

• Input Resolution: 16-bit ADC

• Input Accuracy: ±0.1% of full scale (25°C); ±0.3% over –40°C to +70°C

• Input Impedance: >1 MΩ (voltage), 250 Ω (current)

• Output Types: 4–20 mA or 0–10 V (software-configurable per channel)

• Output Resolution: 16-bit DAC

• Output Accuracy: ±0.1% of full scale (25°C); ±0.3% over –40°C to +70°C

• Output Load: 0–10 V: min 1 kΩ; 4–20 mA: max 600 Ω

• Diagnostics: Per-channel open-wire detection (inputs/outputs), short-circuit protection (outputs), over-range/under-range detection (inputs)

• Fail-Safe Output States: Software-configurable per channel (hold last value, go to min, go to max, or user-defined preset) on communication loss

• Isolation: 1500 V RMS (field-to-backplane); 500 V RMS between channels

• Power: 24 V DC backplane power, ≤4 W (plus external field supply for outputs)

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

• Terminals: Screw-type (suffix-dependent)

Advantages

• Mixed I/O capability – 4 inputs + 2 outputs in one slot; saves rack space and reduces module count.

• Software-configurable I/O – each input and output independently set for current or voltage; eliminates hardware jumpers.

• High 16-bit resolution – precise control and measurement for demanding applications.

• Per-channel diagnostics – open-wire and short-circuit detection for proactive maintenance.

• Output fail-safe – software-defined output states on communication loss.

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

• Cost-effective – lower total installed cost compared to separate input and output modules.

• Optical isolation – protects backplane from field transients.

Applications

• Compact control panels – where space is limited and mixed I/O is required

• PID control loops – reading process variables (inputs) and driving actuators (outputs) in a single module

• Small-scale automation – packaging machines, small conveyors, and standalone systems

• Test stands – monitoring sensors and controlling actuators in a compact footprint

• HVAC systems – reading temperature/pressure sensors and controlling dampers/valves

• Water/wastewater – monitoring flow/level sensors and driving pump/fan controls

• Retrofit projects – replacing multiple modules with a single mixed I/O module

Competitor Comparison

The DS3820MAUC is the compact mixed I/O solution – offering 4 analog inputs and 2 analog outputs in a single slot. Compared to using separate AI and AO modules, it saves one rack slot, reduces panel space, and lowers total installed cost (module cost + wiring). Against competitor universal I/O modules, the DS3820MAUC offers superior diagnostics (open-wire detection on both inputs and outputs) and per-channel fail-safe configuration. For applications requiring a small number of analog I/O points, the DS3820MAUC delivers the most space-efficient and cost-effective solution.

Selection Tips

• Choose DS3820MAUC when you need a balanced mix of analog inputs and outputs (4 AI + 2 AO) in a single slot.

• Ideal for compact panels, PID control loops, small automation systems, and retrofit projects.

• Verify the input and output types match your field devices – each channel independently configurable for current or voltage.

• Consider the output fail-safe behavior – configure each output channel for the safe state on communication loss.

• Not suitable for high-channel-count applications – use dedicated AI or AO modules for larger I/O counts.

• Ensure your PLC/DCS can handle the mixed I/O data structure from the DS3820MAUC.

Precautions

• Input wiring: For current inputs (4–20 mA), ensure the loop is powered externally or through the module (if loop-power option is supported – verify your version).

• Output load: For 0–10 V outputs, minimum load is 1 kΩ; for 4–20 mA, maximum loop resistance is 600 Ω.

• Inductive loads: Use external flyback diodes for inductive output loads.

• Wiring: Keep analog wiring separated from power and digital signals to avoid noise.

• Fail-safe testing: Test output fail-safe behavior during commissioning – confirm outputs go to the desired state on communication loss.

• Open-wire detection: Requires minimum load current – very high-impedance inputs may not trigger detection.

• Grounding: Maintain proper grounding to avoid ground loops affecting input accuracy.

• Power: Requires external 24 V field supply for outputs – ensure supply capacity.

• Calibration: Perform periodic calibration using precision sources/meters to maintain accuracy.

• Spare: Keep one spare DS3820MAUC for critical mixed-I/O applications – the mixed feature set may have longer lead times.