TRICONEX TRICON 3351

The TRICONEX TRICON 3351 can be referred to by two possible interpretations:

1. Triconex 3351 Processor Module (Less Likely):

While less likely due to the presence of “Triconex Tricon” in the name, there’s a possibility the TRICONEX TRICON 3351 could be a processor module used in older Triconex systems. Information for such modules might be scarce.

2. Triconex 3351 Pulse Analog Input (PI) Module (More Likely):
3. 

This is the more probable designation based on available information about Triconex products. Here’s a breakdown of the details for this interpretation:

Product Name:

• Invensys Triconex 3351 Pulse Analog Input (PI) Module

Product Description:

The Triconex 3351 is a versatile and reliable pulse analog input module used in safety instrumented systems (SIS) by Invensys (now Schneider Electric). An SIS is a separate layer of control responsible for protecting personnel, equipment, and the environment from accidents caused by unexpected process malfunctions.

The 3351 is specifically designed to work with non-amplified magnetic speed sensors commonly used on rotating equipment such as turbines or compressors. It converts the signal from these sensors into a usable analog current signal for the SIS controller.

Product Function:

The Triconex 3351 performs the following tasks within an SIS:

• Pulse Signal Reception: It receives pulse signals from magnetic speed sensors mounted on rotating equipment. These pulses represent the speed of the rotating shaft.
• Pulse Frequency to Analog Conversion: The module converts the received pulse frequency signal into a proportional analog current signal (typically 4-20 mA). This current signal represents the speed of the rotating equipment.
• Signal Filtering and Conditioning: The 3351 might filter and condition the analog signal to remove noise and ensure accuracy for the SIS controller.
• Safety Integrity Features: The module might incorporate features to ensure the integrity of the safety signal path, like self-diagnostics and error detection.

Process Control Applications (Safety Focus):

The analog current output from the Triconex 3351 is used for safety-critical control functions within a process:

• Speed Monitoring and Control: Monitoring the speed of critical rotating equipment within a process and taking safety actions like triggering emergency shutdowns if the speed exceeds safe limits.
• Safety Logic Integration: Providing speed data as an input to the SIS controller’s safety logic for decision-making and initiating safety actions in case of abnormal operating conditions.

Product Parameters and Specifications (Refer to Schneider Electric website or datasheet for details):

Exact specifications may vary depending on the revision of the Triconex 3351 module. However, some typical parameters might include:

• Input Signal Type: Designed for pulse signals from non-amplified magnetic speed sensors.
• Input Pulse Frequency Range: The range of pulse frequencies the module can convert into an analog current signal (e.g., 1 Hz to 10 kHz).
• Output Current Range: The typical analog current output range (e.g., 4-20 mA).
• Accuracy: The level of precision in converting the pulse frequency signal into a proportional analog current signal.
• Safety Certifications: Certifications by regulatory bodies for use in safety instrumented systems (e.g., IEC 61508).

Finding More Information:

• Schneider Electric Website: Search for “Triconex 3351” on the Schneider Electric website (https://www.se.com/us/en/work/products/industrial-automation-control/) for product information, user manuals, and datasheets with detailed specifications.
• Authorized Distributors: You can purchase the Triconex 3351 module or find more information from authorized Schneider Electric distributors who specialize in process control products.

Important Considerations:

• Safety-Critical Application: The Triconex 3351 is designed for safety-critical applications within SIS. Selection, configuration, and maintenance of this module should be performed by qualified personnel with expertise in functional safety and SIS design.
• System Integration: The 3351 is a single component within a larger SIS solution. It requires additional components like SIS controllers, safety output modules, and safety final elements (e.g., valves) for a complete safety instrumented system.