Description
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Key Technical Specifications
Parameter Details Electrical & Functional Parameters It has 24 differential inputs divided into 3 groups of 8 inputs. The typical differential input resistance is 2M ohms. It supports temperature display in both Celsius and Fahrenheit, and the temperature resolution can be set to tenths or whole numbers. When a thermocouple burnout occurs, it will trigger a downscale driven response. The safety bus power consumption is 1.8 load units (as an input module). Physical & Installation Indicators The weight of the module is about 1000g as per merchant data. It is designed as a modular structure, which can be easily integrated into the existing Trusted series chassis and is convenient for unified installation and management with other modules of the system. Safety & Fault Tolerance It adopts triple modular redundancy (TMR) and hardware-implemented fault tolerance (HIFT) architecture. It is equipped with dedicated hardware and software testing mechanisms to achieve ultra-fast fault identification and response. When a single internal component fails, the system can still operate reliably, and it can automatically handle faults without false alarms, ensuring the stability of temperature monitoring work. 
ICS Triplex T3431-IM
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Field Application & Problem Solved
In industrial production processes such as petrochemical cracking and thermal power generation, real-time and accurate monitoring of temperature parameters is crucial. If the temperature signal acquisition fails or has errors, it may lead to over-temperature operation of equipment, triggering safety accidents such as explosions and fires. The T3431-IM can solve such problems effectively. For example, in a large chemical reactor temperature monitoring system, its 24 differential inputs can connect multiple thermocouples installed at different positions of the reactor. It converts the collected thermocouple signals into temperature data that the control system can recognize and transmits them stably. Even if one of the internal circuits fails, the TMR architecture can ensure continuous and accurate temperature collection, preventing production shutdowns or safety hazards caused by temperature monitoring interruptions.
ICS Triplex T3431-IM
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Installation & Maintenance Pitfalls (Expert Tips)
- Mismatched Matching Components: It needs to be used with special components such as T3431-MUX and T3431-CA (thermocouple termination cable). Using non-original or mismatched multiplexers and cables will cause signal distortion or failure to transmit. It is necessary to select matching components of the same series.
- Neglecting Burnout Detection Calibration: The module has a thermocouple burnout downscale driven function. If the relevant parameters are not calibrated during installation, it may fail to detect the burnout of the external thermocouple in time, resulting in false temperature data. Calibration should be carried out according to the actual thermocouple type.
- Rough Installation of Input Wires: The module has 24 differential inputs with many wiring points. If the wires are connected loosely or incorrectly grouped during installation, it will affect the accuracy of differential signal collection. It is necessary to strictly follow the grouping principle (3 groups of 8 inputs) for wiring and check the firmness of wire connections.
- Ignoring Module Compatibility: When integrating into the existing Trusted control system, if the system version is not confirmed in advance, compatibility issues may arise, leading to the module not being recognized by the system. It is necessary to confirm the system version compatibility before installation.
