The Triconex TCM 4351B is a specialized Tricon Communication Module (TCM) designed for the Tricon Triple Modular Redundant (TMR) safety system. It serves as the primary gateway for high-speed data exchange between the Tricon controller and external systems, including Distributed Control Systems (DCS), Human Machine Interfaces (HMI), and other peer-to-peer Tricon controllers. The 4351B is engineered to maintain the safety integrity of the system by providing galvanic isolation and robust security protocols, ensuring that communication tasks do not interfere with the core safety functions of the controller.
Product Specifications (Datasheet)
-
Model: TCM 4351B
-
Module Type: Tricon Communication Module (TCM)
-
Ports: 4 x Serial (RS-232/RS-485), 2 x Network (Ethernet 10/100 Mbps)
-
Dimensions: 430 mm x 300 mm x 31 mm (H x D x W)
-
Weight: 1.62 kg
-
Country of Origin: USA
-
Protocols Supported: Modbus (RTU/TCP), TSAA (Triconex System Access Application), Peer-to-Peer, JetDirect
-
Network Speed: 10/100 Mbps (Autosensing)
-
Isolation: 500 VDC (Port-to-Chassis)
-
Compatibility: Tricon v9.6 and later systems
Key Application Fields
-
Plant-Wide Integration: Linking safety-instrumented systems (SIS) to a plant-wide DCS for centralized monitoring.
-
Redundant Data Links: Providing high-availability telemetry for offshore oil platforms and remote pipelines.
-
Sequence of Events (SOE): Transmitting high-resolution time-stamped data for post-trip forensic analysis.
-
Peer-to-Peer Safety: Enabling safe communication between multiple Tricon chassis in complex, distributed safety loops.
-
Maintenance & Programming: Serving as the interface for TriStation 1131 engineering software for configuration and diagnostics.
Product Usage Instructions
-
Module Placement: Insert the 4351B into any available COM slot in the Tricon main chassis. For communication redundancy, it is standard practice to install two TCMs in adjacent slots.
-
Network Configuration: Connect Ethernet cables to the NET 1 or NET 2 ports. Use the TriStation 1131 software to assign static IP addresses and configure subnet masks.
-
Serial Configuration: For Modbus RTU or legacy serial connections, configure the dip switches or software settings for the appropriate RS-232 or RS-485 signal levels.
-
Security Setup: Enable the “Read-Only” hardware switch on the front panel if the module is connected to an unsecure network to prevent unauthorized changes to the safety logic.
-
Monitoring: Monitor the “Active” and “Link” LEDs. A steady green Active LED indicates the module is synchronized with the main processors and successfully managing data traffic.
Q&A: Frequently Asked Questions
Q: What is the difference between the 4351B and the 4351A? A: The 4351B is an upgraded version featuring enhanced internal hardware for improved reliability and better support for newer encryption standards in modern industrial networks.
Q: Can I replace a 4351A with a 4351B while the system is running? A: Yes, in a redundant configuration, the TCMs are hot-swappable. The system will continue to communicate through the secondary TCM while you replace the primary unit.
Q: Does this module support the OPC protocol? A: The TCM supports the TSAA protocol, which is typically used by an external OPC Server (running on a PC) to translate Tricon data into OPC format for HMIs.
Q: How many TCM modules can a single Tricon chassis support? A: A standard Tricon chassis can support up to two logical TCM pairs (four modules total) for massive communication throughput and redundancy.
Ensure your safety system remains connected and secure by utilizing the TCM 4351B and other genuine Triconex TMR communication hardware.
Similar Model Recommendations
-
Triconex 4352B: A variant of the TCM designed specifically for fiber optic network connections.
-
Triconex 4351A: The previous generation communication module, commonly found in legacy v9 and v10 systems.
-
Triconex 4119: A specialized Serial Communication Module for low-speed legacy RS-232/RS-422 links.
-
Triconex 4353: A high-end communication module with enhanced cybersecurity features for critical infrastructure.
-
Triconex 3008: The Main Processor module which coordinates with the TCM 4351B to deliver data to the HMI.
