Name: ICS Triplex T8461 | Trusted TMR Digital Output Module - XINYEDA
Brand: ICS Triplex

Description

T8461: Technical Specifications

Model Number: T8461

Manufacturer: ICS Triplex

Product Type: Trusted TMR Digital Output Module

Number of Channels: 40 digital outputs

Output Type: Sourcing (PNP)

Output Voltage: 24V DC nominal (18-30V DC range)

Output Current: 2A maximum per channel

Continuous Current per Channel: 500mA typical

Power Supply: 24V DC (redundant configuration supported)

Power Consumption: 15W maximum

Operating Temperature: -40°C to +70°C

Storage Temperature: -40°C to +85°C

Relative Humidity: 5% to 95% non-condensing

Isolation: 1500V RMS channel-to-channel

Response Time: <1ms per channel

Short Circuit Protection: Electronic current limiting

Connector Type: Removable screw terminal block

Dimensions: 30 mm × 130 mm × 150 mm

Weight: 0.9 kg

Safety Certification: SIL 3 per IEC 61508

ICS Triplex  T8461

Core Features & Customer Value

System Redundancy and Fault Tolerance: The module’s triple modular redundant design incorporates three separate processing channels for each output path. For control system engineers responsible for critical process safety, this architecture ensures that a failure in one channel does not disrupt the control function, maintaining process continuity and preventing unplanned shutdowns. The hardware-based voting logic operates without requiring additional software layers, providing deterministic response times essential for safety instrumented functions. The module’s diagnostics continuously monitor the health of each channel, alerting maintenance personnel to potential issues before they escalate into system failures, thereby supporting a proactive maintenance strategy and reducing operational downtime.

High-Current Drive Capability: Each output channel can source up to 2A at 24VDC, enabling direct control of industrial actuators such as solenoid-operated valves and motor starters without the need for intermediate power relays. For panel designers and system integrators, this high drive capacity simplifies cabinet layouts by reducing the number of interposing devices, lowering overall installation costs and improving system reliability. The built-in short-circuit and overload protection prevents damage to the module and connected field devices during fault conditions, extending equipment life and reducing maintenance costs. The fast response time (<1ms) ensures that control commands are executed promptly, meeting the tight timing requirements of emergency shutdown sequences and process interlocks.

Modular and Scalable System Integration: The module’s compact, standardized form factor allows for high-density installations in control racks, supporting up to 40 output channels per module. This design approach enables system designers to scale I/O capacity efficiently, accommodating process expansions without requiring complete system re-engineering. The module’s hot-swappable capability, when used in a properly configured system, allows for field replacement without taking the safety system offline. This feature is particularly valuable in continuous process industries, such as hydrocarbon refining or power generation, where production uptime is paramount. The standard communication protocols and physical interfaces facilitate seamless integration with other Trusted system components, reducing engineering effort during system deployment and future upgrades.

ICS Triplex  T8461

Typical Applications

The ICS Triplex T8461 is extensively deployed in emergency shutdown systems for offshore oil and gas production platforms. In these applications, the module typically controls hydraulic or pneumatic shutdown valves that isolate process sections during overpressure, high level, or fire detection events. The triple redundant output design ensures that shutdown commands are executed even if one or more internal components fail, meeting the strict availability requirements for SIL 3 safety functions. The module’s robust construction and wide operating temperature range are critical in the harsh environmental conditions found offshore, where reliable operation is required despite exposure to salt spray, temperature extremes, and platform motion.

In ethylene cracker units within petrochemical complexes, the T8461 is used to control large fuel gas control valves and steam injection valves that regulate the severity of the cracking reaction. The module’s high current output capability allows for direct control of large valve actuators, eliminating the need for external power relays that could introduce additional failure points. The comprehensive diagnostic reporting enables the process control team to monitor the health of each valve control loop, identifying issues such as sticking actuators or deteriorating limit switches before they cause process upsets or unsafe operating conditions.

For power generation facilities, particularly in gas turbine control systems, the module provides outputs for fuel shutoff valves, inlet guide vanes, and bleed valves that protect the turbine during rapid transients or fault conditions. The module’s fast response time is essential for preventing turbine overspeed during load shedding events, while the triple redundant architecture ensures that critical protection functions remain available even during internal component failures. The hot-swap capability supports predictive maintenance strategies, allowing technicians to replace modules during scheduled turbine outages without risking unplanned downtime during peak demand periods.

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