Features:
- Triple Modular Redundant (TMR) speed inputs with 2-out-of-3 voting for each of three independent machine groups, ensuring fault tolerance for overspeed detection.
- Quad-redundant, fault-tolerant relay outputs per group with force-guided contacts and current sensing diagnostics, enabling safe shutdown even after multiple component failures.
- Independent operation from the main processor—once configured, the T8442 executes shutdown logic autonomously, maintaining safety during communication loss.
The T8442 employs a 2-out-of-3 voting scheme across its three TMR speed input channels per group, ensuring that a single sensor or input circuit failure does not compromise overspeed detection. Each channel is galvanically isolated with 2500 V impulse withstand, protecting the system from field-side transients.
Each machine group on the T8442 features two independent output channels—one for over-speed and one for over-acceleration—each built with four redundant relays arranged in a series/parallel structure. This quad configuration ensures that no single relay failure can prevent a trip command from reaching the field actuator. Force-guided contacts provide positive confirmation of relay state, while current sensors in each leg verify load continuity.
Once configured, the T8442 operates autonomously, executing its overspeed and over-acceleration logic without continuous supervision from the main processor. This independence ensures that even if processor communications fail or the application program stops, the safety functions remain active. The module supports hot-standby configurations with companion slots, allowing online replacement without process interruption.
The T8442 ICS Triplex TMR Speed Monitor module may still be available for purchase and support from Apter Power beyond
End-Of-Life (EOL) by the manufacturer (OEM).
ICS Triplex T8442 Standard Accelerometer Interconnect Cable Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
ICS Triplex T8442 Universal AC Power Supply Specs
General
- Manufacturer ICS Triplex
- Model T8442
- Condition New Original ready stock
- Product Family
T8403C,T8431C,T8302,T8451
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not
included with this equipment unless listed in the above stock item description. All prices are
shown in USD.
- Emergency Shutdown (ESD) Systems: Monitor stop buttons, pressure switches, level switches, etc., and trigger a safe shutdown in case of danger.
- Fire and Gas Monitoring Systems (F&G): Receive digital signals from flame detectors, smoke detectors, and gas sensors.
- Boiler Management Systems (BMS): Ensure that the start-up, operation, and shutdown processes of boilers and furnaces comply with safety logic.
- Functional Safety Certification: TÜV Rheinland certified, compliant with IEC 61508, supporting safety circuits up to SIL 3 level.
- Explosion-proof Certification: ATEX and IECEx certified, allowing installation in Zone 2 hazardous areas (requires appropriate cabinetry).
- Environmental and Electromagnetic Compatibility: Meets CE marking requirements and is UL/CSA North American safety certified.
- Designed specifically for Rockwell ICS Triplex Trusted™ controller racks, it cannot be directly inserted into third-party racks.
- Fully compatible with Trusted™ T8000 series processors, power supplies, and T8403 digital output modules.
- Communication and Networking Integration:
Supports industrial protocols such as EtherNet/IP and Modbus TCP/RTU through the controller, enabling communication with Rockwell's ControlLogix systems or third-party DCS systems (such as Honeywell and DeltaV).