Core Function: Provides 40-channel configurable digital input/output for safety instrumented systems (SIS), acting as an interface between field devices (e.g., fire/gas sensors, valve monitors) and Trusted TMR controllers.
Manufacturer: ICS Triplex Part number: ICS Triplex T8842
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T8842: Product OverviewThe ICS Triplex T8842 is a high-reliability Universal Field Termination Assembly (FTA) module designed for safety-critical industrial processes (e.g., oil & gas, chemical, power generation). As part of Honeywell’s Trusted™ TMR safety platform, it serves as the primary interface between field devices (e.g., fire/gas detection sensors, valve position monitors) and Trusted TMR Zone Interface Modules (T8448) or Valve Monitor Modules (T8449). The module supports both digital input and output functions, with each of its 40 channels configurable to meet specific application needs (e.g., analog input for valve position, digital output for solenoid valves).A key feature is its Triple Modular Redundancy (TMR) architecture, which ensures fault tolerance by using three independent channels to process signals. If one channel fails, the other two vote to maintain correct operation, minimizing downtime in critical systems. The T8842 also includes built-in diagnostics (e.g., channel status monitoring, short-circuit protection) and supports hot-swapping, allowing maintenance without shutting down the system. Engineered for harsh environments, it operates in a wide temperature range (-20°C to +60°C) and withstands dust, water, and vibration (up to 5g).
ICS Triplex T9110
T8842: Technical Specifications
Model Number: T8842
Manufacturer: ICS Triplex (Honeywell)
Product Type: Universal Field Termination Assembly (FTA)
Number of Channels: 40 configurable I/O channels (digital input/output)
Operating Voltage: 18-28VDC (field power supply)
Current Rating: Up to 1A per channel (configurable)
Communication Interface: Compatible with Trusted TMR controllers (e.g., T8448, T8449) via proprietary backplane
Redundancy Level: Triple Modular Redundancy (TMR)
Fault Detection Time: <10 milliseconds
Operating Temperature: -20°C to +60°C
Storage Temperature: -40°C to +85°C
Humidity: 5-95% non-condensing
Protection Rating: IP65 (dust/water resistant)
Mounting: DIN rail or panel mount
Dimensions: 368mm (W) x 267mm (H) x 140mm (D) (approximate)
Weight: ~5kg (approximate)
Certifications: IEC 61508 SIL 3, UL, CE
T8842: Core Features & Customer ValueTriple Redundancy for Zero Downtime: The T8842’s TMR design ensures that a single channel failure (e.g., due to a faulty sensor or wiring error) does not disrupt the system. The voter circuit cross-validates signals from all three channels, rejecting anomalies and maintaining safe operation. This is critical for industries like oil & gas, where downtime can result in significant financial losses or safety risks.Configurable I/O for Versatility: With 40 configurable channels, the T8842 supports a wide range of field devices—from digital inputs (e.g., emergency stop buttons) to analog outputs (e.g., valve position feedback). This versatility eliminates the need for multiple specialized modules, simplifying system design and reducing inventory costs. For example, a chemical plant can use the same module to monitor both digital sensors (e.g., pressure switches) and analog valves (e.g., flow control).Harsh Environment Resilience: The T8842 operates in extreme temperatures (-20°C to +60°C) and withstands vibration (up to 5g) and shock (up to 30g). Its IP65 rating protects against dust and water ingress, making it suitable for outdoor installations (e.g., offshore platforms) or dusty industrial environments (e.g., cement plants).Seamless Integration with Trusted Systems: Designed specifically for the Trusted TMR platform, the T8842 integrates seamlessly with controllers (e.g., T8100) and other modules (e.g., T8448 Zone Interface). This ensures consistent data flow and simplifies commissioning, reducing setup time for large-scale industrial projects.Advanced Diagnostics for Proactive Maintenance: Built-in diagnostics monitor channel health, power supply, and communication status. The module detects faults (e.g., open circuits, short circuits) in <10ms and reports them via the controller, enabling operators to address issues before they escalate. This reduces unplanned downtime and maintenance costs by up to 30% compared to non-diagnostic modules.
ICS Triplex T9110
T8842: Typical ApplicationsThe T8842 is deployed in safety-critical industrial processes where reliability and uptime are paramount:
Oil & Gas: Monitors fire/gas detection sensors (e.g., flame detectors, gas transmitters) and valve positions in offshore platforms or refineries. Its TMR design ensures safe shutdowns during equipment failures or leaks.
Chemical Processing: Controls safety interlocks for reactors, pumps, and storage tanks. The module’s configurable I/O supports both digital inputs (e.g., emergency stops) and analog outputs (e.g., valve feedback), enabling precise process control.
Power Generation: Monitors turbine status, generator protection relays, and switchgear signals in thermal or renewable energy plants. Its wide temperature range supports outdoor substation installations.
Manufacturing: Integrates with robotic arms, conveyor systems, and packaging machines to implement safety functions (e.g., emergency stops, guard monitoring). The module’s low fault detection time minimizes production downtime.
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