The ICS Triplex T8461/T8461C is a high-reliability digital output module designed for safety-critical control systems. As part of Honeywell’s Trusted TMR platform, this ruggedized module provides 32 isolated digital outputs with SIL3 certification per IEC 61508 standards. The T8461 variant offers standard output channels, while the T8461C includes additional diagnostic capabilities for mission-critical applications.
Engineered for continuous operation in harsh environments, the T8461/T8461C modules feature galvanic isolation (1500VAC) and short-circuit protection on all outputs. Their hot-swappable design enables replacement without system shutdown, minimizing downtime in oil/gas and power generation facilities.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Model | T8461/T8461C |
| Manufacturer | ICS Triplex (Honeywell) |
| Type | Digital Output Module |
| Output Type | 32 channels (isolated) |
| Voltage Range | 5-125VDC/90VAC |
| Current Rating | 2A per channel (resistive) |
| Isolation | 1500VAC channel-to-channel |
| Response Time | <5ms (90% load) |
| Diagnostics | Built-in (T8461C only) |
| MTBF | >200,000 hours |
| Operating Temp | -40°C to +70°C |
| Humidity | 5-95% non-condensing |
| Power Consumption | 8W (max) |
| Certifications | IEC 61508 SIL3, ATEX Zone 2 |
Key Features and Advantages:
Safety compliance: The T8461C variant provides real-time channel diagnostics with <10ms fault detection, meeting SIL3 requirements for process safety. Its patented current monitoring detects open/short circuits without additional wiring.
Flexible configuration: Modules support mixed voltage groups (4×8 channels) with independent power supplies. Optional fuse protection prevents cascade failures during overloads.
Robust design: Military-grade connectors withstand 500+ mating cycles in high-vibration environments. Conformal coating protects against corrosive atmospheres.
Application Areas:
- Oil & Gas: Emergency valve actuation
- Power Generation: Turbine lube oil pumps
- Chemical: Reactor cooling systems
- Mining: Ventilation damper control
In offshore platforms, the T8461C ensures fail-safe operation of blowout preventers.
Related Products:
- Digital signal processing module ICS TRIPLEX T8451C
- ICS TRIPLEX T8111C Trusted CCoat TMR Processor Module
- ICS TRIPLEX T8310 Fault Tolerant Programmable Controller
- ICS TRIPLEX T8151B Fault Tolerant Programmable Controller
- ICS TRIPLEX T8461 Fault Tolerant Programmable Controller
Installation and Maintenance:
Installation preparation: Verify backplane slot compatibility before installing T8461/T8461C modules68. Use torque screwdrivers (0.6Nm) for terminal connections to prevent strand breakage.
Maintenance recommendations: Perform annual contact resistance tests (<50mΩ per channel). Clean connector pins biannually with isopropyl alcohol
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