TRICONEX Trident Controller

Deep Technical Analysis of Trident Safety Instrumented System

Trident control system, as an outstanding representative in the field of industrial automation, is specifically designed for low point applications and distributed I/O scenarios. Its core architecture is based on advanced Triple Modular Redundancy (TMR) technology, providing unparalleled safety and availability for critical industrial processes through highly reliable hardware design and intelligent diagnostic mechanisms. This article will delve into the various technical specifications of the Trident system, from the core processor to various I/O modules, to environmental adaptability and international certification, providing you with a detailed technical reference guide.

Core Architecture: Main Processor and Communication Module

The "brain" of the Trident system consists of a main processor module and a communication module, which work together to ensure real-time data processing and smooth external communication.

1. Main processor module

Each Trident system is jointly controlled by three main processor modules, which are installed on the same motherboard and run as independent channels of the triple redundant system. This design ensures that the system can maintain normal control logic even in the event of a single channel failure. The MP module provides powerful processing capabilities, equipped with 16MB of DRAM memory for storing user written applications, sequence of events (SOE) data, I/O data, and communication and diagnostic buffers.

In terms of communication interfaces, the MP module has extremely high flexibility. It provides an RS-232 or RS-485 Modbus port, allowing for direct TMR connection with DCS or other external hosts without the need for additional intermediate modules. In addition, it also has a built-in 10BaseT Ethernet (IEEE 802.3) port specifically designed for connecting to the TriStation 1131 programming workstation.

To ensure real-time and consistency of the system, the three MP modules utilize TriBus - a high-speed, fault-tolerant inter processor bus - to compare their respective data during each scan. At the same time, MP communicates with the I/O module through a TMR HDLC I/O bus running at a rate of 2 megabits per second. In terms of physical structure, the MP motherboard not only provides module installation interfaces, but also is equipped with redundant 24 volt fuse logic power connectors, which can directly power the MP module and transfer the logic power to the I/O motherboard, simplifying power wiring.

The front panel design of the MP module is highly user-friendly and integrates a variety of status indicators. For example, the "Field Power" alarm indicator is used to indicate the loss or failure of power supply on site; The 'Logic Power' alarm indicator indicates a loss or malfunction of the system power supply; System Alarm "indicates application issues or compromised system integrity. In addition, there is a "Pass" indicator used to indicate that the processor is in normal working condition, an "Active" indicator that flashes when executing applications, and a "Fault" indicator used for fault detection.

2. Communication module

The communication module serves as a three to one interface between MP and the external world. A single Trident controller can support up to two CM modules on a CM motherboard, with each module running independently. This configuration can achieve redundant communication connections or provide additional independent communication ports.

The CM module supports a wide range of industrial communication protocols, including communication with external host computers, distributed control systems (DCS), open networks, network printers, other Trident v2 systems, and even Tricon versions 9-10 systems.

In terms of interface configuration, each CM module provides three optically isolated RS-232 or RS-485 serial ports, which users can configure as Modbus point-to-point or multi-point network connections, with a maximum transmission rate of 115 kilobits per second. At the same time, each CM is equipped with two network ports: a 10 megabit Ethernet port (supporting 10BaseT and AUI interfaces) and a 100 megabit Ethernet port (supporting 100BaseTX and MII interfaces). This design allows the use of Media Adaptation Units (MAUs) to convert Ethernet media types or extend network distances.

The CM module also supports a wide range of protocols. The serial port supports Modbus master (RTU), Modbus slave (ASCII or RTU), and JetDirect network printer server DLC/LLC. The network ports support TSAA (UDP/IP), TSAA with IP Multicast (UDP/IP), TriStation, point-to-point communication (UDP/IP or DLC), Modbus TCP master/slave, Triconex time synchronization (UDP/IP or DLC), and SNTP.

I/O module system: Precision control of analog and digital

Trident's I/O modules follow a unified mechanical design principle, support hot standby function, and have mechanical fail safe keys to prevent accidental insertion. Each I/O module occupies one of the two slots on the motherboard, and the "L" and "R" labels on the motherboard indicate the position of the left and right modules, respectively. The module can be in an active or hot standby state on the base plate, supporting online replacement, greatly improving the maintainability of the system. The maximum operating environment temperature for all I/O modules is 158 ° F (70 ° C).