4211 is the Remote Expansion Module (RXM) of the Invensys Triconex system, mainly used to extend the Triconex controller to remote sites. It is connected via single-mode optical fiber, with a maximum distance of 7.5 miles (12 kilometers). It features high performance, versatility, programmability, strong communication capability, as well as high reliability and stability.
Basic Information
Model Identification: TRICONEX 4211 belongs to the remote single-mode optical fiber type in Remote Expansion Modules (RXM), with the corresponding model number 4211-3.
Application Scenarios: As a remote RXM module, it needs to be used in conjunction with the main RXM module. It is used to deploy I/O modules at remote sites up to 7.5 miles (12 kilometers) away from the main chassis when the total I/O bus cable length of the system exceeds 100 feet (30 meters).
Technical Parameters
Connection Method: It is connected to the main RXM module via 6 optical fiber cables, which transmit the transmit and receive signals of channels A, B, and C respectively.
Cable Type: Compatible with single-mode optical fibers.
Transmission Rate: Consistent with the I/O bus, which is 375 kilobits per second.
Diagnostic Functions: Equipped with diagnostic indicators such as PASS, FAIL, ACTIVE, TX, RX1, RX2, and RX3 to monitor the operating status of the module.
System Configuration Requirements
Chassis Configuration: It needs to be installed in an RXM chassis. Each RXM chassis must be equipped with 2 power modules, providing 6 logical slots for I/O modules and 1 blank slot.
Address Setting: Each RXM chassis must be assigned a unique address (between 2-15), which must not be duplicated with other chassis in the system.
Compatibility: It is used in conjunction with the main RXM module (model 4210-3) to jointly realize the remote expansion function.
Functional Advantages
Expansion Capability: It supports extending the control range of the Triconex system to remote sites, meeting the needs of long-distance monitoring and control in large-scale industrial facilities.
Anti-interference: It adopts optical fiber transmission, which has strong anti-static and electromagnetic interference capabilities, ensuring the stability of data transmission in complex industrial environments.
Redundancy Support: It can be integrated into the system's redundancy design and work with mechanisms such as hot standby modules to improve the reliability and availability of the overall system.
The Tricon system, which includes the TRICONEX 4211 Remote Expansion Module (RXM), supports online module maintenance, including hot-swap related operations. The logical slot arrangement of the system provides two online methods for repairing faulty modules: the hot standby method and online module replacement. When a module fails, it can be replaced without interrupting the process.
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