TRICONEX 4351B Programmable logic controller

TRICONEX 4351B Programmable logic controller

The TRICONEX 4351B is a high-performance, fault-tolerant programmable logic controller (PLC) designed for critical control and safety applications in a wide range of complex industrial processes and application scenarios.

Here are the main features of the TRICONEX 4351B:

High-performance processor and large memory: It uses a 32-bit processor with a main frequency of 33MHz, ensuring efficient logic operations and data processing capabilities. At the same time, it is equipped with 1MB RAM and 4MB flash memory, which can store more programs and data and support more complex control logic.
A variety of I/O interfaces: analog, digital, serial, Ethernet and other I/O interfaces are provided to facilitate connection and communication with various sensors and actuators.
Redundant architecture: With three-module redundancy (TMR) architecture, three completely independent processors execute the same logic at the same time. This redundancy ensures high availability and fault tolerance of the system, even in the event of a processor failure.
Programmable: Support programmable function, users can write control logic and security rules according to specific application requirements. Controllers are configured and customized using specific programming languages to meet a variety of industrial control needs.
Compatibility: Compatible with other TRICONEX products and systems, it can be integrated with TRICON and TRIDENT systems for complete control and safety systems.
Modular design: Easy to install, maintain and expand. Users can add or replace modules as needed to meet different security requirements.
Communication protocol support: Support for a variety of communication protocols such as Modbus, DNP3, OPC, etc., to ensure interoperability with different devices and systems.
Fault detection and alarm: Has a fault detection mechanism that can monitor communication failures and generate alerts and notifications if necessary.

64-Point Digital Input Modules Each 64-point Digital Input (DI) module has three isolated channels which independently process all data input to the module. A microprocessor on each channel scans each input point, compiles data and transmits it to the Main Processors on demand. Then input data is voted at the Main Proces￾sors just prior to processing to ensure the highest integrity. All Digital Input Modules sustain complete, ongoing diagnostics for each channel. A failure on any channel acti￾vates the Fault indicator which in turn activates the chassis alarm. A TMR module is guaranteed to operate prop￾erly in the presence of a single fault and may operate properly with certain kinds of multiple faults. All Digital Input Modules support hot￾spare modules and require a separate external termination panel (ETP) with a cable interface to the Tricon backplane. Each module is mechanically keyed to prevent improper installation in a chassis. The Model 3504E High-Density Digital Input Module continuously verifies the ability of the Tricon to detect transitions to the opposite state. On this TMR module, all critical signal paths are 100 percent triplicated for guaranteed safety and maximum avail￾ability. Each channel conditions signals independently between the field and the Tricon. The Model 3564 Single Digital Input Module is optimized for safety-critical applications where low cost is more important than maximum availability. On single modules, only those portions of the signal path which are required to ensure safe operation are triplicated. Special self-test circuitry detects all stuck-On and stuck-Off fault conditions in less than half a second. If a single module detects an input fault, it reports that point as Off, which may cause a glitch during switch-over to a hot-spare module.

Here are the relevant TRICONEX models: