TRICONEX 4328 Digital Output Module

TRICONEX 4328 Digital output module

TRICONEX 4328 is a digital output module specifically designed for high-reliability industrial control scenarios, and it is one of the core components of the TRICONEX Safety Instrumented System (SIS). The module adopts a Triple Module Redundancy (TMR) architecture, combined with advanced fault detection technology, to provide safe and stable switching output control in extreme environments. It is widely used in industries with extremely high safety requirements such as petrochemical, power, and metallurgy.

I. Core Technical FeaturesTriple Module Redundancy (TMR)

• Each output channel is processed in parallel by three independent circuits, and the "two-out-of-three" voting mechanism ensures the accuracy and reliability of output signals.

• A single-channel fault does not affect the normal operation of the system. The module can automatically isolate the faulty channel and issue an alarm, meeting the SIL3 safety integrity level requirements (IEC 61508).

High-Speed Digital Output

• Supports 16 independent digital output channels, with output types of dry contacts or transistors (optional).

• Response time ≤1ms, meeting the fast interlock control requirements of Emergency Shutdown (ESD), Burner Management System (BMS), etc.

Fail-Safe Design

• Automatically switches to a preset safe state (Fail-Safe) in case of power failure or fault, typically in the "output off" mode.

• Built-in self-diagnosis function monitors channel status in real time, with a fault detection coverage rate >99%.

Electrical Isolation and Anti-Interference

• Optical isolation is used between channels and between channels and the system (isolation voltage ≥2500V) to effectively resist Electromagnetic Interference (EMI) and Radio-Frequency Interference (RFI).

• Supports a wide temperature range of -40°C to +85°C, adapting to harsh industrial environments.

II. Technical Parameters

III. Application ScenariosEmergency Shutdown System (ESD)

• As an execution unit of the SIS system, it quickly cuts off valves, pumps, and other equipment when dangerous conditions are detected to prevent accidents from expanding.

Burner Management System (BMS)

• Controls the ignition and flameout logic of burners to ensure the safe operation of industrial furnaces.

Key Valve Control

• Drives Emergency Shutdown Valves (ESDV), Pressure Safety Valves (PSV), etc., to achieve fast-response safety interlocks.

Industrial Process Interlocks

• In scenarios such as chemical reactors and storage tank areas, it  controls multiple devices to prevent dangerous conditions such as overheating and overpressure.

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IV. Product AdvantagesHigh Availability

• The triple redundancy architecture and hot-swappable design ensure uninterrupted system operation during maintenance or faults.

Simplified Integration

• Supports mainstream industrial protocols, enabling seamless integration with existing DCS and PLC systems to reduce integration costs.

Visualized Maintenance

• The module is equipped with LED status indicators to display channel health in real time, supporting online diagnosis and fault location.

Compliance Assurance

• Passes international safety certifications to meet the strict safety standards of industries such as petrochemical and nuclear power.

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V. Typical Application Cases

• Offshore Drilling Platforms: Controls wellhead Safety Shutoff Valves (SSV) and Emergency Shutdown Valves (ESDV), quickly cutting off oil and gas sources when combustible gas leaks are detected.

• Nuclear Power Plants: As an output unit of the reactor protection system, it ensures safe reactor shutdown under abnormal conditions.

• Ethylene Cracking Units: Interlocks the control of cracking furnace feed valves and flare systems to prevent tube overheating and explosions.