Product Short Description

Manufacturer: Metso Automation (Finland)

Product Overview:
The AI3281 is a 16-channel analog input module for the Metso DNA DCS. It processes 4–20 mA, 0–20 mA, or 0–10V DC signals with high accuracy and provides galvanic isolation between channels and the system bus.

Description

Technical Specifications:

Parameter Value
Channel Count 16 channels
Input Signal Types 4–20 mA, 0–20 mA, 0–10V DC (configurable per channel group)
Resolution 16-bit A/D
Accuracy ±0.05% of span (typical)
Isolation 250V DC channel-to-ground, 500V DC channel-to-channel
Sampling Rate 100 ms per channel (all channels)
Power 24V DC from DNA backplane
Communication DNA bus
Operating Temp 0°C to +60°C
Certifications CE, ATEX Zone 2 (standard version)

Functional Features:

  • 3 input types selectable — flexible field wiring
  • Per-channel burnout detection
  • Programmable filter — adjustable damping (0.1–10 seconds)
  • Cold junction compensation for thermocouple modules (if applicable variant)
  • Diagnostic LEDs — channel status, bus communication, power

Applicable Industries: Same as AI8H — Pulp & Paper, Mining, Power, Oil & Gas

Key Advantage over AI8H: Double channel density (16 vs 8) in same physical footprint

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