TRICON DI3301 | Digital Input Safety Module

Technical Specifications

Key Features and Advantages

The DI3301 provides fail-safe digital signal acquisition with triple modular redundancy (TMR) architecture, achieving 99.999% diagnostic coverage for critical safety applications. Its adaptive debounce filtering eliminates contact chatter while maintaining <1ms response for emergency shutdown triggers.

Advanced diagnostics: Features continuous wire-break detection and channel health monitoring through integrated current sensing. The module’s reinforced isolation barriers prevent ground loops in hazardous areas, compliant with ATEX Zone 2 explosion-proof requirements.

Configuration flexibility: Supports both dry contact and 24V wet inputs via software configuration. Hot-swappable design enables module replacement without system downtime, with front-panel LEDs providing instant channel status visualization.

TRICONEX 3301

Application Areas

In chemical processing plants, the DI3301 monitors emergency stop buttons and flame detection sensors, ensuring SIL 3 compliance for process safety systems. Its fast response time (<1ms) meets API 670 requirements for machinery protection in compressor stations.

Nuclear power applications utilize this module for reactor coolant pump status monitoring, leveraging its radiation-hardened components. The wide voltage input range (18-30V DC) ensures reliable operation in substation environments with unstable power supplies.

Offshore oil platforms benefit from its ATEX certification for gas detector inputs in hazardous zones. The module’s moisture-resistant design maintains operation in 98% humidity conditions common in marine environments.

Related Products

AI3301: Analog input module with HART support
DO3301: Digital output module for safety controls
TMR3301X: Triple modular redundant processor
FCM3301: Field communication gateway
PSD3301: Redundant power supply unit

Installation and Maintenance

Installation preparation: Use shielded twisted-pair cables (Belden 8760 or equivalent) for all DI3301 inputs. Maintain 50mm separation from high-voltage cables and ensure proper chassis grounding (<1Ω). Configure input type via TriStation 1131 software before commissioning.

Maintenance recommendations: Perform annual contact resistance measurement on terminal blocks. Clean optical isolation slots every 6 months using approved electronic cleaners. Update firmware during planned shutdowns using Triconex T-1000 programmer.

Product Assurance

The DI3301 undergoes MIL-STD-810G vibration testing and 1000-hour burn-in validation. Schneider Electric provides SIL 3 certification documentation and 24/7 technical support with 4-hour response commitment for critical failures. The 5-year warranty covers all components except damage caused by improper surge protection installation.