TRICONEX 3674 Digital output (DO) module

A digital output (DO) module for industrial automation and process control, it is a key component in the Triconex Safety Instrumented System (SIS).

Core Function & Type

The TRICONEX 3674 is specifically defined as a digital output module. Its primary function is to receive signals from the control system and drive the switching states of external devices (such as relays, indicator lights, valves, or motor starters), thereby enabling control over industrial processes.

Key Technical Specifications

• Output Type: Dual digital outputs (DO) with common ground.
• Operating Voltage: Typically 24 VDC.
• Load Capacity: Maximum load current of 2A per point, with peak transient current up to 10A.
• Operating Temperature Range: -28°C to +73°C.
• Physical Dimensions: Approximately 225 mm x 100 mm x 50 mm.
• Weight: Approximately 1 kg.
• Protection Rating: IP65, offering excellent dust and water resistance.

Key Features & Advantages

1. High Reliability & Safety: Employs Triconex’s signature Triple Modular Redundancy (TMR) design. The system incorporates three completely independent processing channels, ensuring seamless operation even if one module fails, thus guaranteeing safety and continuity in critical processes.
2. Real-Time Control Capability: Capable of rapidly and reliably transmitting control signals, meeting the demanding response time requirements of industrial control systems.
3. Intelligent Diagnostics: Provides extensive diagnostic data, including operating mode (local/remote), device status (on/off), error codes, and maintenance information, facilitating quick troubleshooting and minimizing downtime.
4. Fault Detection: Equipped with real-time fault detection capabilities to promptly identify common issues such as signal line breaks or short circuits, enhancing overall system reliability.
5. Resource Efficiency: By executing logic locally (e.g., main interlocks), it can send processed critical information back to the main controller, thereby reducing the burden on the main CPU and improving overall system response speed.
6. Flexible Scalability: Features a modular design, making system maintenance, replacement, and functional expansion convenient.

Application Areas

Due to its high reliability and safety, the TRICONEX 3674 is primarily used in industries with stringent safety requirements, including:

• Oil & Gas: Critical safety control for offshore platforms and refineries.
• Chemical Industry: Safety interlocks and emergency shutdown systems for complex process flows.
• Power Generation: Safety protection for power plants (especially nuclear) and power distribution systems.
• Manufacturing: Safety control for large-scale automated production lines.
• Water Treatment & Rail Transit: Automation and safety control for critical infrastructure.

Market Information

• Suppliers: Available from various specialized suppliers, such as Xiamen Xingruijia Import & Export Co., Ltd., Fuzhou Jufuxing Automation Co., Ltd., etc.
• Product Status: New, used, and refurbished units are available on the market.
• Pricing: Reference price is approximately 1000 CNY per unit (exact pricing should be confirmed with suppliers).

Summary, the TRICONEX 3674 is more than just a simple output card; it is a safety-grade digital output module integrating high-reliability TMR architecture, intelligent diagnostics, and local logic processing capabilities, specifically engineered to ensure the safety of industrial processes.

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