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Description
Product Overview
The Triconex 3805H is a high-reliability safety-rated digital input module designed for critical safety instrumented systems (SIS) in industries such as oil & gas, chemical processing, and power generation. Part of Schneider Electric’s Triconex™ Triple Modular Redundant (TMR) platform, this module ensures fault-tolerant operation by processing three independent input signals and voting on their status to prevent spurious trips. The Triconex 3805H is certified for Safety Integrity Level SIL 3 per IEC 61508/61511, making it ideal for emergency shutdown (ESD), fire & gas detection, and turbine control systems.
Engineered for extreme environments, the 3805H supports 24V DC discrete inputs and features built-in diagnostics for channel health monitoring, open/short circuit detection, and noise immunity. Its hot-swappable design allows maintenance without system downtime, while redundant communication paths ensure seamless integration with Tricon controllers like the Trident or Trident MR.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Triconex 3805H |
| Manufacturer | Schneider Electric (Triconex) |
| Product Type | TMR Digital Input Module |
| Input Channels | 16 (configurable for sinking/sourcing) |
| Input Voltage | 24V DC ±10% (field-side) |
| Isolation | 1500V AC (channel-to-channel and field-to-logic) |
| Response Time | < 10 ms |
| Redundancy | Triple Modular Redundant (TMR) |
| Communication | TriStation™ Protocol (Tricon bus) |
| Power Consumption | 5 W (typical) |
| Operating Temp | -40°C to +70°C |
| Certifications | SIL 3, IEC 61508/61511, ATEX/IECEx Zone 2 |
| Dimensions | 150 mm x 30 mm x 125 mm (rack-mounted) |
| Weight | 0.8 kg |
3805H
Key Functional Features
- TMR Architecture: Three independent input circuits for fault tolerance and 2-out-of-3 voting logic.
- Advanced Diagnostics: Detects field wiring faults, ground faults, and signal noise.
- Hot-Swappable: Modules can be replaced without shutting down the Tricon system.
- Flexible Configuration: Supports dry/wet contacts, NAMUR sensors, and pulse counting.
- EMI/RFI Immunity: Shielded design compliant with IEC 61000-6-2/6-4.
Application Scenarios
- Oil & Gas: Emergency shutdown (ESD) systems for offshore platforms and pipelines.
- Chemical Plants: Safety interlocks for reactor overpressure or temperature excursions.
- Power Generation: Turbine overspeed protection and boiler management.
- Pharmaceuticals: Critical batch process shutdowns under GMP guidelines.
- Mining: Ventilation control and gas detection in hazardous underground environments.
Related Products
- Triconex 3008 Main Processor (MP): TMR controller for 3805H integration.
- Triconex 3504E Analog Input Module: SIL 3-certified analog signal processing.
- Triconex 4351B Communication Module: Ethernet/IP and Modbus interface for Tricon systems.
- Trident Safety Manager: SIL 3-certified logic solver for complex safety loops.
- TriStation 1131 Software: Configuration and diagnostics tool for Tricon systems.
Product Assurance
Schneider Electric guarantees the Triconex 3805H with a 20-year lifecycle support, including firmware updates and obsolescence management. Each module undergoes rigorous testing per IEC 61508, including HALT (Highly Accelerated Life Testing) and fault injection validation. Global customers receive 24/7 technical support via Schneider’s Critical Infrastructure Response Team, with on-site service within 48 hours for critical failures. Compliance with API 670 and ISA 84.01 ensures adherence to global safety standards.
Note: Verify module compatibility with specific Tricon controllers and firmware versions before deployment.
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