T8451 ICS Triplex

The T8451 is a highly reliable digital output module that provides 40 channels of 24V DC digital output and is widely used in process control, automation, and safety systems.

Designed specifically for safety interlock and process control applications that demand extremely high reliability and fault tolerance, the module's standout feature is its advanced Triple Module Redundancy (TMR) architecture.

This architecture runs the same program in parallel across three identical circuits and uses a majority voting system to determine the final output. This design ensures that the system continues to operate without disruption even if single-point or multiple-point failures occur in some of the circuits.

• Output On/Off Delay: 0.5 ms
• Sampling Update Time: 0.5 ms
• Failover Time: ≤1 ms
• Supports hot-swap functionality
• Operating temperature: -40°C to +70°C (some models: -20°C to +60°C)
• Storage temperature: -40°C to +85°C
• Operating humidity: 5% to 95% RH (non-condensing)
• Protection rating: IP20 (rack-mounted)

A large offshore oil platform required the installation of a brand-new Safety Instrumented System (SIS) using the T8451 as its core digital output actuator module. The T8451's wide operating temperature range of -40°C to +70°C is perfectly suited to the extreme temperature conditions on offshore platforms.

It continued to operate stably even during multiple typhoons and other extreme weather events. The platform's safety availability exceeded 99.999%. The T8451's hot-swap capability allows for routine maintenance without downtime, greatly ensuring the platform's production continuity.

How many output channels does the T8451 have?
The T8451 provides 40 independent digital output channels, divided into 8 independent power supply groups (5 outputs per group).

What is the current per channel?
The rated continuous output current per channel is 2A, and the maximum total current per power supply group is 8A.

What is the protection rating of the T8451?
The protection rating is IP20, making it suitable for installation inside a control cabinet.

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