Triconex DI3311 Digital Input Module

Description

The Triconex DI3311 is a high-integrity digital input module designed for safety-critical applications in industries such as oil & gas, power generation, and chemical processing. It belongs to the Tricon v10/v11 series and supports fault-tolerant operation through Triple Modular Redundancy (TMR) architecture.

Specifications

• Model: DI3311

• Module Type: Digital Input (DI)

• Input Channels: 32 isolated channels

• Nominal Input Voltage: 24 V DC

• Operational Voltage Range: 15–30 V DC

• Absolute Maximum Input Voltage: 33 V DC

• Reverse Voltage Protection: –0.6 V DC

• Input Delay: <10 ms (On to Off or Off to On)

• Input Impedance: >30 kΩ without baseplate, ≈3 kΩ with baseplate

• Input Power: 0.2 W/pt @ 24 V DC, 0.5 W/pt @ 33 V DC

• Input Thresholds:

  • 0–5 V DC = Off region

  • 6–14 V DC = Transition region

  • 15–30 V DC = On region

• Diagnostics: Force-to-value diagnostic (FVD), <2 ms/test

• Isolation:

  • Functional-to-Protective-Earth: 500 V DC

  • Functional-to-Functional-Earth (Logic): 800 V DC

• Scan Time: <1 ms for all 32 points

• Mounting: Tricon main or expansion chassis

• Operating Temperature: 0°C to +60°C

• Hot-Swappable: Yes

• Country of Origin: USA

Features

• Triple Modular Redundancy (TMR): Ensures high fault tolerance and system reliability

• Optical Isolation: Each channel is optically isolated for enhanced safety

• Fast Diagnostics: Built-in self-test and line monitoring for rapid fault detection

• Flexible Input Handling: Supports both dry contact and voltage input types

• Hot-Swappable Design: Enables module replacement without system shutdown

• Industrial Grade: Engineered for demanding environments and continuous operation

• API 670 Compatibility: Meets industry standards for safety and performance

• Global Deployment Ready: Widely used in critical infrastructure worldwide