Triconex AI3351 DCS 16-channel analog input module

• Brand
  Triconex
• Model
  AI3351
• Product Name
  Analog Input Module (32 Channel, 4–20 mA)
• Country of Origin
  United States
• HS Code
  8538900090
• Dimensions
  311 mm×35.6 mm×256 mm
• Weight
  1.34 kg
• Operating Temperature
  -23 °C to +74 °C
• Storage Temperature
  -20 °C to +70 °C
• Power Supply
  5 V DC
• Warranty
  12 month
• Product Status
  New and original

Triconex AI3351 Official Introduction and Technical Specifications

Electrical & Interface Specifications

Input

1.Signal Type: Isolated 4–20 mA analog current input

2.Channel Density: 32 independent field input channels

3. Field Scale Range: 4 mA (minimum) to 20 mA (maximum)

4.Resolution: 16-bit high precision conversion

5.Conversion Accuracy: ±0.05% Full Scale (FS) typical

6.Isolation: Channel-to-backplane galvanic isolation

7.Open/Short Circuit Detection: Built-in field fault monitoring

Output

1.No field analog output

2.Digital voted data output to Tricon backplane bus

3.Fault diagnostic status output to system controller

Power Supply

1.Power Source: Tricon system backplane power supply

2.Operating Voltage: 5 V DC backplane feed

3.Typical Power Consumption: 14.8 W

4. Operating Temperature Range: -20 °C to +70 °C

Product Advantages

1. Superior Fault Tolerance: TMR voting structure ensures valid process readings even if one modular channel fails, achieving zero process interruption.

2. High Density Design: 32 channels per module greatly reduces cabinet space occupation and overall system hardware cost.

3. Ultra-High Measurement Accuracy: 16-bit resolution and ±0.05% FS precision guarantee reliable long-term process monitoring.

4. Full Diagnostic Coverage: Built-in circuit diagnostics enable fast fault localization and reduce troubleshooting downtime.

5. Hot-Swap Maintainability: Online replacement minimizes plant maintenance outage risks and improves system availability.

6. Certified Safety Performance: SIL 3 certified design meets mandatory safety requirements for high-risk process industry applications.

7. Excellent Environmental Adaptability: Stable performance under wide industrial temperature ranges and harsh electromagnetic interference conditions.

Application Cases

1.0Oil and Gas: Used in onshore refineries and offshore platforms for monitoring pressure, flow, level, and temperature transmitters within safety interlock systems.

2.Petrochemical Industry: Deployed in ethylene units, reformer plants, and chemical reactors to acquire critical analog process parameters for SIS interlock protection.

3.Power Generation: Applied in thermal power plants and gas turbine systems for safety monitoring of boiler and turbine auxiliary process variables.

4.Chemical Processing: Utilized in high-risk chemical synthesis and reaction processes to ensure continuous safety parameter detection and emergency interlock response.

5.Mining and Metallurgy: Integrated into furnace safety control and process monitoring systems to maintain stable and accurate field signal acquisition under severe industrial conditions

Key Features & Functions

1.Adopts industry-proven Triconex TMR triple-modular redundant architecture to provide fault tolerance for all measurement circuits

2.Supports full 4–20 mA analog signal acquisition for standard industrial transmitters

3.Provides comprehensive field diagnostics including open loop, short circuit, and over-range detection

4.Performs automatic triple-channel voting to eliminate transient and permanent hardware faults

5.Supports hot-swappable replacement during system runtime without process shutdown

6.Provides continuous real-time data calibration and temperature drift compensation

7.Offers high noise immunity and galvanic isolation to suppress industrial field interference

8.Complies with IEC 61508 SIL 3, IEC 61511 process safety standards