Name: ICS Triplex T8431C | Trusted TMR 24Vdc Analog Input Module - XINYEDA
Brand: ICS Triplex

Description

T8431C: Technical Specifications

Model Number: T8431C

Manufacturer: ICS Triplex

Product Type: Trusted TMR Analog Input Module

Input Channels: 40 analog inputs

Input Current Range: 0-22 mA

Input Voltage Range: 0-6 V DC

Sample Update Time: 0.5 ms

Resolution: 3.9 µA (1/256 mA)

Safety Accuracy: ±1% of full scale

Calibration Accuracy: 0.03%

Recommended Calibration Interval: 2 years

Circuit Type: Fault tolerant, fully triplicated with optional line monitoring

Event Resolution: 1 ms

Time-Stamp Accuracy: ±0.5 ms

Field Common Isolation: ±250 V DC (sustained), ±2.5 kV DC (maximum)

Channel to Channel Crosstalk: -40 to -60 dB

Power Supply: 20 to 32 V DC

Power Consumption: 15-18 W

Self-Test Interval: 2 minutes

Operating Temperature: -5°C to 60°C (23°F to 140°F)

Non-operating Temperature: -25°C to 70°C (-13°F to 158°F)

Temperature Change Rate: 0.5°C/min

Operating Humidity: 10% to 95% RH (non-condensing)

Dimensions: 266 mm (H) × 31 mm (W) × 303 mm (D)

Weight: 1.149 kg (2.5 lbs)

Certifications: IEC 61508 SIL 3, UL, CE

ICS Triplex T8431C

Core Features & Customer Value

Triple Modular Redundancy Architecture: The T8431C’s TMR design provides three independent signal paths for each of the 40 input channels, ensuring continuous operation even if one channel fails. For system designers, this architecture eliminates single points of failure in the I/O path, maintaining process monitoring capability and preventing unplanned shutdowns. The voting system automatically detects and isolates faulty channels while continuing to operate with the remaining healthy circuits, allowing maintenance to be scheduled during planned outages rather than causing immediate production interruptions. This architecture is particularly valuable in safety-critical applications where process monitoring availability directly impacts process safety and production continuity.

High Precision Measurement: The module offers high measurement accuracy with a resolution of 3.9 µA (1/256 mA) and a safety accuracy of ±1% of full scale. For process engineers, this precision ensures that critical process variables are monitored with the necessary accuracy to maintain safe operating conditions and optimize process performance. The 0.5 ms sample update time provides fast response to process changes, enabling quick detection of abnormal conditions that could lead to process upsets or safety incidents. The wide input range (0-22 mA and 0-6 V DC) supports a variety of field instruments, reducing the need for signal conditioning equipment and simplifying system design.

Comprehensive Diagnostics: The module includes onboard diagnostics for detecting faults such as open circuits, short circuits, and overrange conditions. For maintenance personnel, this diagnostic capability provides early warning of developing issues before they affect process operation. The module also provides Sequence of Events (SOE) reporting with a resolution of 1 ms, critical for fault analysis and historical data queries. The front-panel indicators provide immediate visual feedback on module status and individual channel activity, simplifying troubleshooting and reducing mean time to repair. The diagnostic information is also available through the system’s engineering workstation, enabling remote monitoring and historical trending of I/O performance.

Hot-Swap Capability: When used in a properly configured Trusted TMR system, the T8431C supports hot-swap replacement without requiring system shutdown. This feature allows maintenance personnel to replace faulty modules while the control system remains operational, minimizing production impact during maintenance activities. The system automatically detects the new module and synchronizes it with the existing configuration, eliminating the need for manual configuration or calibration. This capability is particularly valuable in continuous process industries where production uptime is critical, as it enables maintenance to be performed without interrupting the process, reducing overall downtime and improving system availability.

ICS Triplex T8431C

Typical Applications

The ICS Triplex T8431C is extensively deployed in safety instrumented systems (SIS) and process control systems within hydrocarbon processing facilities. In offshore oil and gas platforms, the module interfaces with pressure transmitters, temperature sensors, and level transmitters monitoring critical process parameters. The TMR architecture ensures that the system can continue monitoring even if one or more components fail, meeting the high reliability requirements of SIL 3 safety applications. The module’s fast response time and comprehensive diagnostics provide the necessary performance and fault detection capabilities for these life-safety functions.

In chemical processing plants, the T8431C is used to monitor critical process parameters such as reactor temperature, pressure, and flow rates. The module’s triple redundancy architecture provides the fault tolerance required for these critical safety functions, where system availability directly impacts personnel safety and asset protection. The hot-swap capability allows for module replacement without taking the entire safety system offline, which is particularly important in continuous process applications where maintenance windows are limited and production downtime is extremely costly.

For power generation applications, particularly in gas turbine control systems, the T8431C interfaces with temperature sensors, pressure transmitters, and vibration monitors that require high accuracy and reliability. The module’s 40 input channel configuration allows for efficient monitoring of multiple safety functions from a single module, reducing panel space requirements in turbine control cabinets. The wide operating temperature range ensures reliable operation in the elevated ambient temperatures typically found near turbine enclosures, while the robust construction withstands the vibration and electrical noise present in power generation environments.

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