Triconex 4351B-J Main Processor Module for SIS Systems
Manufacturer: Triconex
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Part Number: 4351B-J
Condition：New with Original Package
Product Type: Main Processor Module for SIS Systems
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Product Description
Product Overview
The Triconex 4351B-J is a core processing module designed for Triconex Safety Instrumented Systems. It functions as the primary execution engine within a Tricon controller, responsible for running safety logic, coordinating system communications, and supervising connected I/O resources.
Developed for continuous-duty safety applications, the Triconex 4351B-J operates within a Triple Modular Redundancy architecture. Three independent processors execute the same logic in parallel, with results continuously compared to eliminate single-point failures. This design philosophy makes the module suitable for environments where system availability and deterministic behavior are mandatory.
Role Within Tricon Safety Systems
As the central control element, the module manages scan cycles, diagnostic evaluation, and internal data exchange across the Tricon backplane. It ensures that safety functions are executed consistently and that faults are detected and isolated without disrupting operation.
The Triconex 4351B-J is commonly deployed in safety-critical installations across oil and gas production, refining, petrochemical processing, chemical manufacturing, and power generation facilities.
Technical Specifications
| Parameter | Description |
|---|---|
| Model | Triconex 4351B-J |
| Product Type | Main Processor Module |
| System Platform | Triconex Tricon Safety Instrumented System |
| Processor Design | Triple Modular Redundancy (TMR) |
| Core Functions | Safety logic execution, I/O coordination, system communications |
| Memory | Integrated volatile and non-volatile program memory |
| Communication Support | Ethernet, serial interfaces, Tricon proprietary bus |
| Diagnostics | Continuous self-testing and system health monitoring |
| Online Replacement | Supported without system shutdown |
| Safety Certification | SIL 3 compliant to IEC 61508 (TÜV) |
| Operating Temperature | –40 °C to +70 °C |
| Approximate Weight | 4.98 lbs |
| Typical Applications | Emergency shutdown systems, process safety control |
Operational Characteristics
The processor module delivers deterministic scan performance and comprehensive diagnostics, enabling early fault detection and corrective maintenance. Hot-swap capability minimizes operational disruption during servicing, a critical requirement in continuous process environments.
Its redundant processing design ensures that loss of a single processor channel does not impact safety execution or system availability.
Lifecycle and Service Notes
The Triconex 4351B-J belongs to an established generation of Tricon processor modules. While still widely installed, it is generally supplied for maintenance support, system expansion, or legacy system sustainment. Proper configuration, validation, and periodic testing are essential to maintain SIL 3 compliance throughout the system lifecycle.