Triconex AI‑3351 | 4–20 mA Analog Input Module 32 Channels

Product Description

Overview

The Triconex AI‑3351 (Part No. AI3351) is a high-precision analog input module designed for Triconex Safety Instrumented Systems (SIS).
It converts analog signals from field devices, including pressure transmitters, temperature sensors, flow meters, and vibration sensors, into digital values for processing.
Moreover, the module’s TMR architecture ensures fault-tolerant operation, continuous signal integrity, and SIL 3 safety compliance.
This module is widely used in critical safety applications across industries such as oil & gas, petrochemical, power generation, and chemical processing.

Technical Specifications

• Product Type: Analog Input Module (AIM)

• Model Number: AI‑3351

• Manufacturer: Schneider Electric (Triconex brand)

• System Compatibility: Triconex SIS (Tricon/Trident platforms)

• Architecture: Triple Modular Redundancy (TMR)

• Number of Channels: 32 analog input channels, commoned

• Supported Signal Types: 4–20 mA current loop, ±10 VDC voltage input

• Nominal Input Current: 4–20 mA

• Operational Current Range: 2–22 mA DC

• Input Bandwidth (3 dB): 16 Hz

• Source Impedance: 180 Ω

• Resolution: 16-bit ADC conversion

• Accuracy: ±0.1% of span typical

• Sampling Rate: Up to 200 Hz per channel

• Isolation: Channel-to-channel and channel-to-system isolation

• Diagnostics: Built-in self-diagnostics, fault detection, redundancy monitoring

• Safety Integrity Level: SIL 3 compliant

• Certifications: UL, CE, ATEX, IECEx

• Operating Temperature: –20 °C to +60 °C

• Storage Temperature: –40 °C to +85 °C

• Humidity Range: 5–95% RH (non-condensing)

• Dimensions (H × W × D): 187 × 114 × 25 mm

• Weight: 1.5 kg

• Shipping Weight: 3 kg

FAQ

Q1: What type of signals can AI‑3351 handle?
It supports 4–20 mA current loops and ±10 VDC voltage inputs from field devices.

Q2: How many input channels are available?
The module provides 32 analog input channels, commoned for flexibility.

Q3: Is this module suitable for safety-critical systems?
Yes, it is SIL 3 certified and built on TMR architecture for fault tolerance.

Q4: What industries commonly use the AI‑3351?
Oil & gas, chemical, petrochemical, power generation, and process safety applications.

Q5: Is the AI‑3351 still manufactured?
This module is discontinued, but it comes with Radwell’s 2-year warranty for reliability assurance.