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Description
Product Overview
The Triconex DI3301S2 Tri-GP is a triple-redundant digital input module designed for high-integrity safety instrumented systems (SIS) in critical industrial applications. As part of the Triconex Tri-GP series by Schneider Electric, this module provides fault-tolerant signal acquisition for emergency shutdown (ESD), fire and gas detection, and turbine control systems. The DI3301S2 Tri-GP employs Triple Modular Redundant (TMR) architecture, ensuring continuous operation even with two simultaneous channel failures, meeting IEC 61508 SIL 3 safety standards.
Engineered for harsh environments, the Triconex DI3301S2 Tri-GP features galvanic isolation (2500V RMS) between field inputs and logic circuits, preventing ground loop interference. Its configurable 24V DC/48V DC input ranges support both dry and wet contact signals, making it adaptable to global instrumentation standards. The module’s patented “Voter” technology compares three independent input channels in real-time, automatically masking faulty signals while maintaining process continuity. With hot-swappable design and front-accessible diagnostics, it minimizes downtime in oil refineries, power plants, and chemical processing facilities.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | DI3301S2 Tri-GP |
| Manufacturer | Triconex (Schneider Electric) |
| Product Type | Triple Redundant Digital Input Module |
| Channels | 8 (isolated, TMR architecture) |
| Input Voltage | 24V DC (18-30V range) / 48V DC (36-60V range) |
| Input Type | Dry/Wet Contact (sink/source configurable) |
| Isolation | 2500V RMS channel-to-bus |
| Response Time | <10ms (typical) |
| Power Consumption | 150mA @ 5VDC (logic), 50mA @ 24VDC (field) |
| Operating Temperature | -40°C to +70°C |
| Certifications | SIL 3, ATEX, IECEx, UL Class I Div 2 |
| Connection | Removable screw terminal block |
| MTBF | >75 years (calculated) |
TRICONEX 3301
Key Features Description
The Triconex DI3301S2 Tri-GP combines ultra-reliable signal acquisition with advanced diagnostics. Each input channel contains three independent circuits that perform simultaneous signal processing, with continuous cross-comparison to detect discrepancies. The module’s “Smart Field Diagnostics” automatically identify field wiring issues like open circuits, short-to-ground, or contact chatter, providing detailed alerts through TriStation 1131 software.
Dynamic fault tolerance:
In degraded mode, the module maintains 1oo2D (1-out-of-2 with diagnostics) operation if two channels fail. The DI3301S2 Tri-GP features per-channel LED status indicators (green/red) for quick visual health checks, showing active states, faults, and voting results. Its non-volatile memory retains configuration during power cycles, while the built-in watchdog timer ensures safe state transition during processor anomalies.
The module supports both normally open (NO) and normally closed (NC) contact types through software configuration. For cybersecurity protection, it includes tamper-evident hardware seals and encrypted firmware validation. The front-mounted test points allow live circuit measurements without disrupting operations, essential for maintenance in continuous process industries.
Application Areas
The Triconex DI3301S2 Tri-GP is vital in safety-critical installations requiring fail-safe digital input processing. In offshore platforms, it monitors emergency shutdown valves and gas detection sensors. Nuclear power plants utilize its TMR reliability for reactor coolant pump status monitoring, while LNG terminals rely on it for flame detector inputs.
Critical deployment scenarios:
- Chemical plant pressure relief valve position feedback
- Pharmaceutical cleanroom door interlock systems
- Mining conveyor belt emergency stop circuits
- Aerospace test stand safety perimeter monitoring
- Hydroelectric dam gate position verification
The module’s -40°C cold-start capability ensures operation in Arctic oil fields, while its 5g vibration resistance (10-2000Hz) suits mobile drilling equipment. In pharmaceutical manufacturing, it verifies sterilizer door seals, and in data centers, it monitors fire suppression system readiness.
Related Products
- DO3301S2 Tri-GP: Triple redundant digital output counterpart
- AI3301S2 Tri-GP: Analog input module for 4-20mA/HART signals
- Tricon v11: Next-gen safety controller chassis
- 3503E: TMR analog input module
- 3625X: HART-enabled analog input card
- 9662-810: Redundant power supply unit
- 4000104-510: TriStation 1131 safety logic toolkit
Product Assurance
Triconex guarantees the DI3301S2 Tri-GP with a 20-year lifecycle support commitment and 5-year warranty covering all manufacturing defects. Each module undergoes exhaustive testing including 1000V/m EMI immunity tests and 96-hour thermal cycling (-40°C to +85°C). Certified to IEC 61508 SIL 3 and ISO 13849 PL e, it includes full safety manual documentation with FMEDA reports. Schneider Electric’s global network provides 24/7 technical support with guaranteed 4-hour response for critical failures. The product ships with TÜV-certified functional safety data and cybersecurity hardening guidelines compliant with IEC 62443 standards.
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