T8431 | ICS Triplex | Trusted TMR 24Vdc Analogue Input Module

Product Description

The ICS Triplex T8431 is a Trusted Triple Modular Redundancy (TMR) analogue input module engineered for high‑integrity safety and control systems. Operating at 24 VDC, it provides fault‑tolerant signal acquisition across 40 analogue input channels, ensuring reliable measurement in safety‑critical environments.

Key Features

• Manufacturer: ICS Triplex

• Product No.: T8431

• System Supply Voltage Range: 20–32 VDC

• Number of Inputs: 40 channels

• User Defined Thresholds: 4 configurable thresholds

• Input Current Range: 0–22 mA

• Input Voltage Range: 0–6 VDC

• Sample Update Time: 0.5 ms

• Resolution: 3.9 µA (1/256 mA)

• Safety Accuracy: ±1% of full scale

• Calibration Accuracy: 0.03%

• Calibration Interval: Recommended every 2 years

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

• Fusing: None (external if required)

• Intrinsic Safety: Requires external barrier

• Sequence of Events:

  • Event resolution: 1 ms

  • Timestamp accuracy: ±0.5 ms

• Field Common Isolation:

  • Sustained: ±250 VDC

  • Maximum withstand: ±2.5 kVDC

• Channel Crosstalk: –40 to –60 dB

• Power Consumption: 15–18 W

• Self‑Test Interval: 2 minutes

Environmental Ratings

• Operating Temperature: –5 °C to +60 °C (23 °F to 140 °F)

• Storage Temperature: –25 °C to +70 °C (–13 °F to 158 °F)

• Temperature Change Rate: 0.5 °C/min

• Operating Humidity: 10–95% RH, non‑condensing

• Environmental Specifications: Refer to ICS Triplex Document 552517

Physical Characteristics

• Dimensions:

  • Height: 266 mm (10.5 in)

  • Width: 31 mm (1.2 in)

  • Depth: 303 mm (12 in)

• Weight: 1.149 kg (2.5 lb)

• Shipping Weight: 2 kg

• Real Time Clock Resolution: 100 µs

Application Scenarios

The T8431 is ideal for oil & gas, petrochemical, power generation, and transportation industries, where precise analogue signal acquisition is required. It is commonly used for monitoring temperature, pressure, and flow transmitters in emergency shutdown (ESD), fire & gas detection, and turbine control systems.

FAQ

Q: How many analogue inputs does the T8431 support? A: It provides 40 analogue input channels.

Q: What is the resolution of the module? A: 3.9 µA (1/256 mA), ensuring high‑precision measurement.

Q: How often should calibration be performed? A: A calibration check is recommended every 2 years.