Overview

The Triconex DI3311 module is engineered to acquire digital signals from field devices such as switches, sensors, and relays with exceptional reliability. It features 32 isolated input channels, each monitored independently to ensure accurate signal capture and fault detection.

Moreover, the DI3311 operates within a Triple Modular Redundancy (TMR) architecture, where three independent input circuits process the same signal. This design enables the system to detect and isolate faults without interrupting operation. For instance, in an emergency shutdown system, the DI3311 ensures that a single channel failure does not compromise the integrity of the shutdown logic.

In addition, the module includes built-in diagnostics to detect stuck-on, stuck-off, and shorted inputs. It is hot-swappable, allowing maintenance without system downtime, and is fully compatible with Triconex TriStation 1131 programming software.

Technical Data

Typical Applications

• Emergency Shutdown Systems (ESD): Monitors critical field inputs for rapid fault detection and safe shutdown.

• Fire and Gas Detection Systems: Captures digital signals from flame detectors, gas sensors, and alarms.

• Power Generation: Interfaces with turbine protection and boiler control systems.

• Oil and Gas Facilities: Supports high-integrity input acquisition in hazardous and offshore environments.

• Chemical Processing Plants: Monitors interlocks and safety switches in SIL 3-rated safety loops.

Example: In a refinery’s SIS, the DI3311 module ensures that digital signals from pressure switches and emergency pushbuttons are accurately captured and processed without interruption, maintaining system safety.

FAQ

Q: What is the function of the DI3311 module?
A: It acquires 32 digital input signals from field devices and processes them within a TMR safety architecture.

Q: Is it compatible with Triconex TMR systems?
A: Yes, it is designed specifically for use in Triple Modular Redundancy configurations.

Q: What kind of diagnostics does it support?
A: It detects stuck-on, stuck-off, and shorted input conditions for each channel.

Q: Can it be replaced during operation?
A: Yes, it is hot-swappable, allowing maintenance without system shutdown.

Q: What safety standards does it meet?
A: It complies with IEC 61508 and is certified for SIL 3-rated applications.