Product Introduction

Technical Specifications

Core Functional Parameters

• Architecture: Fault-tolerant, fully triplicated circuit design with optional line monitoring (TMR technology)
• Number of Inputs: 40 independent analog input channels
• Input Type: Analog (voltage + current)
• Input Voltage Range: 0 – 6 Vdc
• Input Current Range: 0 – 22mA
• Sample Update Time: 0.5ms (fast real-time data collection)
• Resolution: 3.9uA (1/256mA)
• User Defined Thresholds: 4-off (configurable for fault detection)
• Safety Accuracy: +/- 1% of full scale (default threshold for 0x70nn series slice discrepancy faults)
• Calibration Accuracy: 0.03% (high-precision signal processing)
• Recommended Calibration Interval: 2 years (input channel calibration check)
• Sequence of Events (SOE):
  • Event Resolution: 1ms
  • Time-stamp Accuracy: ±0.5 ms
• Real Time Clock Resolution: 100µSec (precise time stamping for events)
• Self-Test Interval: 2 minutes (automatic fault detection)

Electrical Specifications

• Supply Ratings: 20 - 32 Vdc, 20 W
• System Supply Voltage Range: 20 to 32V dc
• Power Consumption: 15 – 18W (typical operating range)
• Fusing: None (external fusing recommended if required)
• Intrinsic Safety: Requires external barrier (for hazardous area use)
• Isolation:
  • Field Common Isolation (Sustained Working): ±250V dc
  • Field Common Isolation (Maximum Withstanding): ±2.5kV dc
• Channel to Channel Crosstalk: -40 to –60 dB (minimizes signal interference)

Mechanical & Environmental Parameters

Mechanical Parameters

• Dimensions (HxWxD): 266mm (10.5ins) x 31mm (1.2ins) x 303mm (12ins)
• Weight: 1.149kg (2.5lbs)
• Mounting: Rack-mounted (compatible with ICS Triplex Trusted series chassis)
• Connectors: Dedicated terminal blocks for analog inputs, power supply, and communication

Environmental Parameters

• Operating Temperature: -5°C to 60°C (23°F to 140°F)
• Non-operating (Storage) Temperature: -25°C to 70°C (-13°F to 158°F)
• Temperature Change Rate: 0.5ºC/min (stable performance during temperature fluctuations)
• Operating Humidity: 10 – 95% RH (non-condensing)
• Environmental Specifications: Refer to Document 552517
• Vibration Resistance: Compliant with industrial safety standards (suitable for harsh plant environments)
• Shock Resistance: Compliant with industrial safety standards (withstands mechanical impact)
• Protection Class: IP20 (panel/rack mount, suitable for control cabinets)

Certifications

• Safety & Hazardous Area Certifications: Ord/HazLoc/ATEX/IECEx (suitable for hazardous and non-hazardous industrial areas)
• Safety Standards: Complies with IEC 61508 (SIL 3) – meets high safety integrity requirements for critical applications

Key Features & Advantages

1. TMR Fault Tolerance: Fully triplicated circuit design with optional line monitoring, eliminating single-point failures and ensuring continuous operation in critical systems.
2. High Channel Density: 40 independent analog input channels, supporting both voltage (0-6Vdc) and current (0-22mA) inputs, reducing cabinet space requirements.
3. Exceptional Precision: 0.03% calibration accuracy, 3.9uA resolution, and 0.5ms sample update time, ensuring precise, real-time analog signal collection.
4. Configurable Thresholds: 4 user-defined thresholds for flexible fault detection, with a default safety accuracy of +/-1% of full scale.
5. Hazardous Area Compatible: Ord/HazLoc/ATEX/IECEx certifications, with external intrinsic safety barriers for use in explosive environments.
6. Strong Isolation: ±2.5kV dc maximum withstand isolation (field common) and -40 to -60dB crosstalk, minimizing signal interference and ensuring signal integrity.
7. Robust Environmental Performance: Wide operating temperature range (-5°C to 60°C), high humidity tolerance (10-95% RH), and stable performance during temperature fluctuations.
8. Automatic Self-Test: 2-minute self-test interval for proactive fault detection, reducing downtime and maintenance costs.
9. Precise Time Stamping: 1ms event resolution, ±0.5ms time-stamp accuracy, and 100µSec real-time clock resolution for detailed event logging.

Applications

• Oil & Gas Industry: Collects analog signals from pressure, temperature, and flow sensors in ESD (Emergency Shutdown) and F&G (Fire and Gas) systems.
• Petrochemical Plants: Processes analog data from process transmitters, ensuring safe operation of high-risk chemical processes.
• Power Generation: Monitors turbine, boiler, and auxiliary system parameters (e.g., temperature, pressure) for critical control.
• Chemical Processing: Collects analog signals from process sensors in hazardous environments, supporting safety instrumented systems (SIS).
• Industrial Automation: Precise analog data collection for mission-critical control systems where accuracy and reliability are paramount.

Installation Guide

Preparation Steps

1. Gather necessary tools: screwdriver, torque wrench, wire stripper, cable cutter, and multimeter.
2. Inspect the T8431 module for transportation damage (check housing, connectors, and physical integrity).
3. Verify the module model (ICS Triplex T8431) and specifications (40 channels, 0-6Vdc/0-22mA input) match application requirements.
4. Prepare the 20-32Vdc power supply, analog input cables (shielded, for signal integrity), and external intrinsic safety barriers (if used in hazardous areas).
5. Ensure the mounting rack/chassis is clean, stable, and properly grounded; check that the mounting space matches the module’s dimensions (266x31x303mm).
6. Review the calibration requirements (2-year interval) and prepare calibration tools if needed.

Mounting

1. Align the T8431 module with the compatible Trusted series chassis/rack guide rails.
2. Slide the module into the slot until it clicks into place, ensuring a secure connection to the chassis backplane.
3. Secure the module to the rack/chassis using the provided mounting screws, tightening to the recommended torque to ensure stability.
4. Ensure adequate ventilation around the module (min 8cm clearance) to dissipate heat (15-18W power consumption), preventing overheating.

Wiring

1. Power Supply Wiring: Connect the 20-32Vdc power supply to the module’s dedicated power terminals, ensuring correct polarity to avoid damage.
2. Analog Input Wiring: Connect analog sensors/transmitters to the 40-channel terminal block, matching voltage (0-6Vdc) or current (0-22mA) inputs to the corresponding channels.
3. Isolation & Shielding: Use shielded cables for analog input wiring to minimize crosstalk and electromagnetic interference; connect the cable shield to the module’s ground terminal.
4. Intrinsic Safety Wiring (if applicable): Install external intrinsic safety barriers between the module and field devices in hazardous areas, following the barrier manufacturer’s guidelines.
5. Fusing (if required): Install external fuses for additional protection, as the module does not include internal fusing.

Testing & Configuration

1. Power on the module and the Trusted system. Check the power status LED (green = normal power supply) and self-test indicators.
2. Verify the module’s self-test function (runs every 2 minutes) by monitoring the status LEDs and system diagnostics.
3. Calibrate the input channels (if not pre-calibrated) to ensure 0.03% calibration accuracy; follow the recommended 2-year calibration interval.
4. Configure the 4 user-defined thresholds via the system configurator, setting the desired fault detection limits (default: +/-1% of full scale for 0x70nn series slice discrepancy faults).
5. Test analog input signals by connecting a test signal (0-6Vdc/0-22mA) to each channel, verifying the sample update time (0.5ms) and resolution (3.9uA) via system diagnostics.
6. Verify SOE functionality by triggering test events, confirming 1ms event resolution and ±0.5ms time-stamp accuracy.

Usage Notes

• Do not exceed the input voltage (0-6Vdc) or current (0-22mA) ranges, as this may damage the module or connected sensors.
• The module has no internal fusing; install external fuses if additional protection is required.
• In hazardous areas, use only approved external intrinsic safety barriers to ensure compliance with Ord/HazLoc/ATEX/IECEx certifications.
• Maintain the recommended 2-year calibration interval for input channels to preserve 0.03% calibration accuracy.
• Ensure proper grounding and shielding of analog input cables to minimize crosstalk (-40 to -60dB) and electromagnetic interference.
• Operate the module within the specified temperature range (-5°C to 60°C) and temperature change rate (0.5ºC/min) to avoid performance degradation.
• The module is rated IP20 and must be installed in a control cabinet to protect against dust and physical contact.
• Regularly check the self-test status and system diagnostics to detect faults early; replace the module if self-test failures persist.

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