ICS TRIPLEX T8451C

Description

Product Description

Product Parameters

1. Electrical Specifications: It is a 24V DC nominal digital output module, with the field voltage range of 18 – 32V DC and the system supply voltage range of 20 – 32V DC. Each channel has a continuous output current rating of 2A, and each power group is limited to 8A. It is divided into 5 independent power groups, each responsible for 8 outputs. The on-state resistance of the output is 0.6Ω, and the off-state effective leakage resistance is 33Ω.
2. Safety and Fault Detection: It adopts a fully triplicated fault-tolerant architecture with optional line monitoring. The worst-case fault detection time is 1.0 hour, and the average is 0.5 hour. It has electronic latching short-circuit protection and can detect open-circuit faults in field wiring. The sequence of events reporting has a resolution of 1ms, which can quickly record the state changes of the output.
3. Physical and Environmental Parameters: The operating temperature range is -5°C to 60°C, and the non-operating temperature range is -25°C to 70°C, with a maximum temperature change rate of 0.5°C per minute. It can work stably in an environment with 5 – 95% non-condensing humidity. The weight of the module varies slightly by supplier, ranging from 200g to 1000g, and its compact size allows flexible installation in standard controller chassis slots.
4. Response Performance: The output on/off delay is 0.5ms, and the sample update time is also 0.5ms, which ensures the module can quickly respond to control signals for precise process control.

Advantages and Features

1. Strong Fault Tolerance: The TMR architecture and built-in 2oo3 voting logic of T8451C fundamentally prevent system shutdown caused by single-point failures. Its hot-swappable design allows maintenance personnel to replace the module without stopping the system, which significantly reduces downtime.
2. Comprehensive Safety Functions: It supports de-energize-to-trip operation and can be configured for energize-to-trip under specified conditions, both of which are certified to meet safety requirements. The built-in diagnostic function continuously tests current, voltage, and other parameters of each channel, enabling rapid detection of stuck-on or stuck-off failures.
3. Flexible Expandability: The expander interface of the module can be installed in any single-width slot of the controller chassis. When installed in pairs, the TMR processor can automatically determine the active module, facilitating capacity expansion and system upgrading according to actual application needs.

Application Cases in Application Fields

1. Petroleum and Natural Gas Industry: In an offshore oil drilling platform, ICS TRIPLEX T8451C is used in the emergency shutdown system. It controls the switching of valves and pumps through its 40 output channels, monitoring pipeline pressure and gas leakage in real-time. When abnormal data is detected, the module immediately triggers a shutdown signal to avoid explosion and leakage accidents.
2. Chemical Industry: A large chemical plant integrated T8451C into its reaction kettle temperature and pressure monitoring system. The module connects with temperature and pressure sensors, and controls the operation of cooling and pressure relief equipment. Its short-circuit protection and open-circuit detection functions prevent production accidents caused by sensor or actuator line failures.
3. Power Industry: In a thermal power plant’s turbine control system, T8451C is responsible for outputting control signals to the turbine’s vibration monitoring and speed regulation components. Its TMR architecture ensures that the control signal is not interrupted due to module faults, thus guaranteeing the stable operation of the power generation system and avoiding power outages caused by turbine failures.

Comparisons with Competing Products

Selection Suggestions

1. Prioritize for Safety-Critical Scenarios: If the project involves SIL 3-level systems such as emergency shutdown, fire protection, or pressure relief, ICS TRIPLEX T8451C is the preferred choice, as its certification and TMR architecture can meet strict safety requirements.
2. Match with Channel and Load Requirements: For projects that need to control multiple actuators (such as multiple valves, pumps) at the same time, the 40-channel design of T8451C can reduce the number of modules used and save installation space and costs.
3. Consider System Compatibility: If the existing control system is ICS TRIPLEX’s Trusted series, choosing T8451C can achieve seamless integration without additional adaptation of communication protocols.

Precautions

1. Installation Requirements: The module is not approved for direct connection to hazardous areas. It must be used with intrinsic safety barrier devices when installed in explosive or corrosive industrial environments to avoid safety hazards caused by electrical sparks.
2. Power Supply Management: Ensure that the input voltage is within the range of 20 – 32V DC. Excessive voltage will damage the internal circuits. At the same time, separate wiring for each independent power group should be carried out to prevent mutual interference.
3. Maintenance Notes: When performing manual repair or hot-swapping, follow the operation manual to avoid incorrect operation that leads to module short circuits. Regularly check the module’s diagnostic information to troubleshoot potential faults in advance. The self-test should be performed every 2 minutes as required to ensure the normal operation of the fault detection function.
4. Storage Conditions: When storing unused modules, keep them in an environment with a temperature of -25°C to 70°C and dry air to prevent moisture and high temperature from damaging the internal components.

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