TRICONEX 3721 Analog Input Module – Tricon Safety System
In high-stakes process industries — oil & gas, petrochemical, nuclear, and power generation — a single failed analog input signal can cascade into a full plant shutdown, equipment damage, or worse, a catastrophic safety event. Without a reliable, SIL-certified analog input module at the heart of your Safety Instrumented System (SIS), your process variables go blind. The TRICONEX 3721 Analog Input Module is the critical link between your field transmitters and your Tricon safety controller, ensuring that every pressure, temperature, flow, and level signal is read accurately, voted correctly, and acted upon in real time.
The TRICONEX 3721 is a core analog input module designed for the Tricon Triple Modular Redundant (TMR) safety platform — one of the most widely deployed SIL 3-capable safety systems in the global process industry. Manufactured by Schneider Electric’s TRICONEX division, the 3721 occupies a trusted position in functional safety architectures across refineries, LNG terminals, offshore platforms, and chemical plants worldwide. Its TMR architecture means three independent processing paths vote on every input signal simultaneously, delivering fault tolerance that no single-channel or dual-redundant system can match.
Technical Specifications
- Model: TRICONEX 3721
- Module Type: Analog Input Module
- Platform: Tricon Safety System (TMR)
- Brand / Manufacturer: TRICONEX (Schneider Electric)
- Architecture: Triple Modular Redundant (TMR)
- Signal Type: Analog Input (4–20 mA / voltage signals)
- Weight: 2,500 g (approx.)
- Compliance: Designed for SIL 2 / SIL 3 Safety Instrumented Systems
- Form Factor: Plug-in module for Tricon chassis
Note: All specifications are based on published TRICONEX documentation. Do not rely solely on this page for engineering design — always consult the official TRICONEX 3721 product manual.
Key Features & Benefits
- Triple Modular Redundancy (TMR): Three independent signal paths vote 2-out-of-3 on every analog input, eliminating single points of failure and ensuring continuous operation even during module faults.
- High-Integrity Signal Acquisition: Precision analog-to-digital conversion maintains signal accuracy across the full operating range, critical for tight process control and safety trip setpoints.
- Online Replacement (Hot-Swap): Modules can be replaced without shutting down the Tricon system, maximizing plant availability and minimizing maintenance windows.
- Fault Detection & Diagnostics: Built-in self-diagnostics continuously monitor module health, reporting faults to the Tricon controller and SCADA/DCS without interrupting process control.
- Seamless Tricon Integration: Designed exclusively for the Tricon platform, the 3721 integrates natively with Tricon chassis, power supplies, and the TriStation 1131 programming environment.
- Long Service Life: TRICONEX modules are engineered for decades of continuous industrial service, reducing lifecycle replacement costs.
Industry & Equipment Applications
- Oil & Gas: Emergency Shutdown Systems (ESD), High Integrity Pressure Protection Systems (HIPPS), wellhead control, pipeline monitoring.
- Petrochemical & Refining: Reactor safety systems, distillation column protection, fired heater safety.
- LNG & Gas Processing: Compressor protection, cryogenic process monitoring, flare management.
- Power Generation: Turbine protection systems, boiler safety, nuclear auxiliary systems.
- Chemical Manufacturing: Batch reactor safety, exothermic process protection, toxic gas detection integration.
- Offshore Platforms: Topside ESD, subsea control system interfaces, fire & gas system integration.
System Integration & Compatible Parts
The TRICONEX 3721 is designed to operate within the broader Tricon TMR ecosystem. Compatible and commonly paired components include:
- Tricon Main Chassis and Expansion Chassis
- TRICONEX Power Supply Modules (e.g., 8312, 8110)
- Tricon Communication Modules (e.g., 4351A, 4119A)
- Tricon Digital Input / Output Modules (e.g., 3501E, 3601E, 3703E)
- TriStation 1131 Programming & Diagnostic Software
- Tricon Enhanced Intelligent Safety System (TRICON CX platform)
When sourcing replacement or spare modules, always verify the firmware revision and chassis compatibility with your site’s Tricon system configuration.
Our Quality Assurance Process
At Konmask.com, every TRICONEX module we supply goes through a rigorous multi-step quality process before shipment:
- Visual Inspection: Physical examination for damage, corrosion, bent pins, and label integrity.
- Authenticity Verification: Cross-referencing serial numbers and part markings against known TRICONEX manufacturing standards.
- Functional Testing (where applicable): Bench-level power-on and communication checks on select modules.
- Secure Packaging: Anti-static ESD packaging, foam cushioning, and moisture barrier bags for safe international transit.
- Documentation: Each shipment includes a packing list, and test reports are available upon request.
How to Order
- Submit an Inquiry: Contact us via email at support@konmask.com or call +0086 19859288691 with your required quantity and delivery timeline.
- Receive a Quote: Our team will respond within 1 business day with pricing, lead time, and availability confirmation.
- Order Confirmation: Review and approve the proforma invoice. We accept T/T (bank transfer), PayPal, and other B2B payment methods.
- Shipment & Tracking: We ship globally via DHL, FedEx, UPS, and freight forwarders. Tracking information is provided upon dispatch.
- After-Sales Support: Our technical team is available post-delivery to assist with installation questions and compatibility verification.
Why Choose Konmask.com?
- ✅ Specialized in Industrial Automation & Safety Systems: We focus exclusively on PLC, DCS, and safety system components — not general electronics.
- ✅ Global B2B Supply: Serving engineering firms, EPCs, plant operators, and MRO teams across 50+ countries.
- ✅ Hard-to-Find Parts: We stock obsolete, discontinued, and long-lead-time modules that OEM channels can no longer supply.
- ✅ Fast Response: Dedicated account managers respond to inquiries within 24 hours.
- ✅ Competitive Pricing: Direct sourcing relationships allow us to offer market-competitive pricing on genuine parts.
- ✅ Trusted by Industry: Hundreds of successful deliveries to refineries, power plants, and chemical facilities worldwide.
Frequently Asked Questions
Q: Is the TRICONEX 3721 still in production?
A: The 3721 is part of the legacy Tricon platform. While Schneider Electric has transitioned to newer platforms (Tricon CX), the 3721 remains widely used in installed base systems. Konmask.com maintains stock of both new and refurbished units to support ongoing operations.
Q: Can the 3721 be used as a direct replacement in my existing Tricon system?
A: In most cases, yes — provided your chassis and firmware versions are compatible. We strongly recommend verifying the module revision level against your system’s configuration documentation before installation.
Q: Do you provide a warranty on TRICONEX 3721 modules?
A: Yes. We offer a standard warranty on all modules supplied. Warranty terms are specified in the sales agreement. Please contact us for details.
Q: What is the lead time for the TRICONEX 3721?
A: Lead time depends on current stock levels. In-stock units typically ship within 3–5 business days. For urgent requirements, please contact us directly for expedited options.
Q: Can you supply other TRICONEX modules alongside the 3721?
A: Absolutely. We supply a comprehensive range of TRICONEX / Tricon platform modules. Contact us with your full BOM for a consolidated quote.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
