TRICONEX 3351 Control Module

Engineered for mission-critical industrial environments, the TRICONEX 3351 Control Module delivers rock-solid reliability in automation systems where failure isn’t an option. This triple-redundant controller has become a go-to solution for sectors like offshore drilling platforms, chemical processing plants, and power generation facilities that demand 99.999% uptime. Its self-diagnosing architecture and hot-swappable components make it particularly valuable in continuous-process industries where unplanned downtime costs millions.

When a Gulf Coast refinery needed to upgrade their emergency shutdown system, the 3351’s ability to handle 128 input/output points while maintaining full redundancy made it the obvious choice. We’ve also seen it deployed in unconventional settings – like a geothermal plant in Iceland where vibration resistance and thermal stability proved crucial. Common companion models in our inventory include the 3511 discrete I/O module and 4355 analog interface, often integrated with legacy Tricon systems during phased modernization projects.

What sets the 3351 apart is its native support for PROFIBUS DP and Modbus TCP protocols right out of the box – no gateway required. The three independent processor cores vote on every action in real-time, while the self-purging watchdog timer catches errors before they propagate. Maintenance crews appreciate the color-coded status LEDs that visible indicate channel synchronization states. For environments with extreme EMI concerns, the built-in galvanic isolation on all I/O channels has proven invaluable during field upgrades at steel manufacturing facilities.