T8423 Trustworthy TMR 24VDC Digital Output Module

Basic Overview
Name and Model: T8480C Trusted TMR 24VDC Digital Output Module. “T8451” is the product model, “Trusted TMR” indicates that it adopts triple modular redundancy technology and has high reliability, and “24VDC” refers to the output voltage of 24 volts direct current.
Manufacturer: ICS Triplex.
Product Type: TrustedTM Module.

Working principle
Triple Module Redundancy (TMR) technology: Within each module, there are three identical circuits operating simultaneously to process the input signal. The final output is determined through a majority voting method. For instance, if one of the circuits fails and outputs an incorrect signal, the output results of the other two normal circuits will be consistent, enabling the determination of the correct output signal. This significantly enhances the reliability and fault-tolerance of the system.

Technical Specifications
Power supply voltage range: The system’s power supply voltage range is 20 to 32V DC, while the working output/fault voltage range is 18 to 32V DC. The output voltage measurement range is 0 to 32V DC, and the maximum tolerated voltage is -1 to 40V DC.
Output channels: There are 40 independent output channels, which can simultaneously control 40 different devices or loads. They are divided into 8 independent power groups, and each power group has 5 working outputs.
Output current: The rated output current (continuous) for each power group and each channel is 2A, limited to 8A for each power group, and the minimum on-state load current is 50mA.
Resistance characteristics: The resistance in the output-off state (effective leakage) is 33Ω, and the output-on resistance is 0.6Ω.
Capacitors: The pre-released version 3.5 has a capacitor range of 30-55uF, and version 3.5 has at least 2800uF at 2A.
Short-circuit protection: It has an electronic short-circuit protection function. When a short circuit occurs in the output, the module will automatically protect itself to prevent damage to the module or other equipment due to the short circuit.
Channel-to-channel crosstalk: The crosstalk between channels is limited to below -40dB, ensuring the independence of signal transmission between each channel and reducing mutual interference.

Functional Features
High Reliability: Utilizing the TMR architecture and fault-tolerant design, it is suitable for harsh industrial environments and can withstand factors such as temperature variations and vibrations. Even if some circuits fail, the system can still operate normally.
High Precision Output: The output signal is precise and reliable, capable of meeting applications with high control accuracy requirements.
Automatic Diagnosis and Monitoring: It has comprehensive, automatic diagnosis and self-testing functions. It can automatically monitor circuits, detect open-circuit and short-circuit faults in on-site wiring and load equipment, and also provides a board-level event sequence (SOE) report with a resolution of 1ms.
Convenient Maintenance: Modules can be replaced online through hot swapping, and the modular design makes installation and maintenance easy.
Electrical Isolation: It has a 2500V pulse tolerance / current isolation barrier, enhancing the module’s anti-interference ability and safety.

Application Domains
Industrial Automation: Such as in the production process control of industries like chemical engineering, power, and metallurgy, ensuring the stable operation and precise control of production equipment.
Aerospace: Used in flight control systems of aircraft, avionics equipment, etc., to ensure flight safety and the reliable operation of equipment.
Rail Transportation: For example, signal control systems and train control systems of subways and high-speed railways, ensuring the safe operation and efficient scheduling of trains.