Product Description
Product Overview
The Triconex 3721 is an Analog Input Module designed for use within the Tricon safety instrumented system (SIS) by Triconex, a brand under Schneider Electric (formerly Invensys). This module provides 32 differential analog input channels to monitor signals (0-5 VDC or 0-10 VDC) from field devices such as pressure, temperature, and flow transmitters. It supports the Triple Modular Redundant (TMR) architecture, ensuring fault-tolerant operation with high accuracy for safety-critical applications in industries like oil & gas, petrochemical, and power generation.
Technical Specifications
The 3721 has the following specifications based on standard characteristics for this model:
| Item | Specification |
|---|---|
| Model/Part Number | 3721 |
| Manufacturer | Triconex (Schneider Electric) |
| Description | Analog Input Module, 0-5/0-10 VDC, 32 Points, Differential |
| Series | Tricon SIS |
| Input Channels | 32 differential analog inputs |
| Input Voltage | 0-5 VDC or 0-10 VDC (configurable) |
| Resolution | 12 bits |
| Accuracy | ±0.15% of full scale |
| Power Supply | 24 VDC (via Tricon chassis backplane) |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Weight | 1.2 kg |
Additional Details
The 3721 includes the following additional information based on its standard use and documentation:
| Category | Details |
|---|---|
| Function | Monitors 32 differential analog input signals from field devices |
| Mounting | Installs in Tricon chassis (e.g., Model 8110 or 8111) |
| Compatibility | Tricon Main Processors (e.g., 3008, 3009), external termination panels |
| Features | TMR fault tolerance, differential inputs, field diagnostics |
| Certifications | Meets IEC 61508 SIL 3, UL, and CE standards |
| Part Type | New, surplus, or refurbished |
