Name: ICS Triplex T8831 | Trusted TMR Analog Input Module - XINYEDA
Brand: ICS Triplex
SKU: ICS Triplex T8831

Description

T8831: Technical Specifications

Model Number: T8831

Manufacturer: ICS Triplex

Product Type: Trusted TMR Analog Input Module

Number of Channels: 40 analog inputs

Input Types: 4-20mA current, 0-10V voltage

Input Resolution: 16-bit

Accuracy: ±0.1% of reading

Update Rate: 10ms per channel

Common Mode Rejection: >120dB at 50/60Hz

Normal Mode Rejection: >60dB at 50/60Hz

Input Impedance: 250Ω (current), >1MΩ (voltage)

Overvoltage Protection: 30V continuous

Power Supply: 24V DC nominal (20-32V DC range)

Power Consumption: 8W typical

Operating Temperature: -40°C to +70°C

Storage Temperature: -40°C to +85°C

Isolation: 1500V channel-to-channel, 2500V field-to-system

Connection Type: Removable terminal block

Safety Certification: SIL 3 per IEC 61508

Dimensions: 30mm × 130mm × 150mm

Weight: 0.9kg

Core Features & Customer Value

Triple Modular Redundant Architecture: The module’s TMR design incorporates three separate signal conditioning paths for each input channel, with continuous voting on input values. For control system engineers designing safety instrumented systems, this architecture provides fault tolerance that prevents single component failures from causing erroneous measurements or system shutdowns. The voting logic automatically identifies and masks faulty channels while continuing to operate with the remaining healthy circuits, maintaining process monitoring capability during component failures. This design approach ensures that the system meets SIL 3 requirements for safety availability, which is essential in applications where measurement accuracy directly impacts process safety.

High-Density Channel Configuration: With 40 analog input channels in a single module slot, the T8831 offers significant space savings compared to conventional analog input modules. For system designers working on large-scale projects, this high channel density reduces the number of modules required, lowering overall system cost and complexity. The consistent channel configuration across all 40 inputs allows for standardized installation practices and reduces the potential for wiring errors during commissioning. The module’s support for both current and voltage inputs provides flexibility for interfacing with various field transmitters without requiring additional signal conditioning equipment, simplifying system design and reducing installation time.

Comprehensive Diagnostic Coverage: The module performs continuous self-monitoring of all critical components, including input conditioning circuits, power supplies, and communication interfaces. For maintenance personnel, this diagnostic capability provides early detection of potential failures before they affect system operation. The module can identify open circuit conditions, short circuits, and signal drift, providing specific fault information that helps technicians quickly locate and resolve issues. The front-panel indicators provide immediate visual feedback on module status and individual channel activity, while the detailed diagnostic information available through the engineering workstation enables remote monitoring and historical trending of input performance.

Signal Integrity and Accuracy: The 16-bit resolution and ±0.1% accuracy ensure precise measurement of process variables throughout the entire input range. For process engineers, this level of measurement precision translates to better process control and reduced variability in critical parameters. The high common mode rejection (>120dB) and normal mode rejection (>60dB) prevent electrical noise from affecting measurement accuracy, ensuring reliable operation in electrically noisy industrial environments. The channel-to-channel isolation (1500V) and field-to-system isolation (2500V) prevent ground loops and ensure that a fault on one channel cannot affect adjacent channels or damage the system backplane.

Typical Applications

The ICS Triplex T8831 is extensively deployed in safety instrumented systems within hydrocarbon processing facilities. In offshore production platforms, the module typically interfaces with pressure transmitters, temperature sensors, and level transmitters that monitor critical process parameters in separation vessels, compressors, and pipeline systems. The module’s high accuracy and reliability ensure precise monitoring of parameters that directly affect product quality and safety, while the SIL 3 certification provides the necessary safety integrity for these high-pressure, high-temperature processes. The wide operating temperature range allows deployment in unmanned equipment rooms where environmental control may be limited.

In refinery applications, the T8831 is commonly used in fired heater protection systems, where it monitors fuel gas pressure, combustion air flow, and stack temperature. The module’s fast update rate (10ms per channel) ensures rapid detection of process deviations that could lead to unsafe operating conditions. The comprehensive diagnostics provide early warning of developing issues such as transmitter drift or wiring degradation, allowing maintenance to be scheduled during planned turnarounds rather than causing unplanned shutdowns. The module’s robust construction withstands the vibration and electrical noise typical of refinery environments, ensuring long-term reliability.

For power generation applications, particularly in combined-cycle power plants, the T8831 provides analog signals for heat recovery steam generator (HRSG) drum level control and feedwater temperature monitoring. The module’s high immunity to electrical noise ensures accurate measurement in the electrically noisy environments typical of power generation facilities, while the channel-to-channel isolation prevents cross-talk between critical measurement points. In these applications, the module’s ability to maintain accurate measurement during component failure ensures continuous power generation while allowing for planned maintenance during unit outages.

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