TRICONEX 3481  communication expansion module

The TRICONEX 3481 is a communication expansion module launched by Triconex, a brand under Rockwell Automation. It is primarily used in Triconex Triple Modular Redundancy (TMR) safety control systems to expand the system's communication interface capabilities. It enables reliable data exchange between safety controllers and external devices (such as HMIs, SCADAs, third-party PLCs, or historians) while ensuring the high safety and real-time performance of the Safety Instrumented System (SIS). The following is its detailed information:

I. Core Functional Features

1. Multi-Protocol Communication Support
   • Supports multiple mainstream industrial communication protocols to meet different system integration needs, including:
     • Modbus RTU/ASCII: Communicates with devices using Modbus serial protocols (such as instruments, remote I/O, and small PLCs) via serial interfaces (RS-232/RS-485), suitable for short-distance, low-rate data transmission scenarios.
     • Optional Protocol Expansion: Some models can support other dedicated protocols through configuration, flexibly adapting to the communication requirements of specific brand devices.
   • Protocol processing uses independent hardware resources to avoid conflicts with the core logic operations of the safety controller, ensuring the real-time performance and security of data transmission.
2. Redundancy and Fault-Tolerance Design
   • Supports dual-channel serial communication configuration, realizing redundant backup of communication links through redundant RS-485 interfaces. When one link fails, it automatically switches to the backup link to prevent monitoring failure or data loss caused by communication interruption.
   • Equipped with communication fault diagnosis and recovery mechanisms, it can detect abnormalities such as link interruptions and data verification errors, and feed back the status to the controller through the system bus to trigger alarms or redundant switching.

The company has multiple main brands, and if you have other brand requirements, you can also send them to customer service for inquiry.

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TRICONEX 3009

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TRICONEX 3721

TRICONEX 4351B

TRICONEX 8120E