ICS Triplex T8270 Trusted 24 Vdc FanAssembly
The ICS Triplex T8270 Trusted 24 Vdc Fan Assembly is a high-performance,
rack-mounted forced cooling system engineered explicitly for the Trusted® Triple Modular Redundancy (TMR) safety-critical automation platform, produced by ICS Triplex (a subsidiary of Rockwell Automation).
In heavy industrial and safety-instrumented systems (SIS), microprocessors and input/output modules generate considerable thermal loads.
The T8270 Fan Tray is designed to fit seamlessly within a standard system enclosure to optimize heat dissipation, eliminate localized thermal hot spots, and guarantee the absolute longevity and reliability of adjacent safety controllers.
Utilizing standard $24\text{ Vdc}$ industrial power, it acts as the primary defense against thermal-induced failures in high-availability environments.
Technical Parameter Table
| Parameter Category | Technical Specification |
| Brand / Manufacturer | ICS Triplex / Rockwell Automation |
| Model / Part Number | T8270 Trusted 24 Vdc Fan Assembly |
| Chassis Form Factor | $2\text{U}$ High, 19-inch Rack-Mounted Sub-chassis |
| Operating Input Voltage Range | $18\text{ Vdc}$ to $28\text{ Vdc}$ (Nominal $24\text{ Vdc}$) |
| Power Consumption | $2 \times 4\text{ W}$ (Total $8\text{ W}$ nominal) |
| Internal Fan Components | 4-off high-reliability Papst Type 8414NG Fans |
| Nominal Fan Speed | $3100\text{ RPM}$ |
| Volumetric Airflow | $69\text{ m}^3\text{/h}$ ($40.6\text{ ft}^3\text{/min}$) per fan |
| Acoustic Noise Rating | Low noise ($32\text{ dB}$ per operating fan) |
| Circuit Overcurrent Protection | Dual internal $250\text{ mA}$ anti-surge fuses |
| **Individual Fan MTBF (at } 40^\circ\text{C)}$ | $70,000\text{ hours}$ |
| **Individual Fan MTBF (at } 70^\circ\text{C)}$ | $35,000\text{ hours}$ |
| Operating Temperature Limits | $0^\circ\text{C}$ to $+60^\circ\text{C}$ ($+32^\circ\text{F}$ to $+140^\circ\text{F}$) |
| Relative Humidity Limits | $10\%$ to $95\%$, non-condensing |
| Dimensions (H x W x D) | $88\text{ mm} \times 483\text{ mm} \times 267\text{ mm}$ ($3.46\text{ in} \times 19\text{ in} \times 10.5\text{ in}$) |
| Net Operational Weight | $1.8\text{ kg}$ ($3.97\text{ lb}$) |
The table below outlines the core mechanical, electrical, and environmental performance specifications for the T8270 Trusted Fan Assembly.
Related Models
The structural integrity of the Trusted cooling framework relies on dedicated interconnection models and specialized power routing boards:
ICS Triplex T8292: Trusted Power Distribution Unit (PDU) Miniature Circuit Breaker (MCB) assembly used to derive the main $24\text{ Vdc}$ source loop for the cooling system.
ICS Triplex T8271: Roof-Mounted Fan Unit, which works in tandem with the T8270 to vent exhausted internal enclosure air outward from the top of the industrial cabinet.
Cable Model TC-011-01: The dedicated Trusted Fan Power Cable engineered specifically to daisy-chain power between multiple rack-mounted fan trays.
Application Cases
Emergency Shutdown (ESD) Systems: Installed within oil and gas downstream refineries to keep logic solvers running cool during sustained, non-stop ambient operating cycles.
Burner Management Systems (BMS): Deployed in thermal power plant control cabinets where external ambient radiant heat makes active internal chassis cooling mandatory.
Fire and Gas (F&G) Protection Cabinets: Placed underneath highly populated $I/O$ chassis arrays to avoid component degradation over long-term field installation lifespans.
Semiconductor Subsystem Cleanrooms: Used in high-availability tool environments requiring quiet, low-vibration ($32\text{ dB}$ rating) continuous cooling solutions.
Product Advantages and Features
T8270
Strategic Air Flow Isolation: The T8270 physical chassis integrates a specialized airflow baffle.
This ensures that warm air drawn out by the vertically mounted rear fans is deflected away from the module chassis sitting immediately above it, forcing efficient linear vertical thermal currents instead.
Power Supply Redundancy Architecture: The assembly is powered via dual independent $24\text{ Vdc}$ input lines.
Power distribution is split internally such that the four fans operate in cross-wired pairs via individual $250\text{ mA}$ anti-surge fuses, preventing a single electrical fault from disabling all cooling.
Embedded Electronic Safety Protections: Every individual Papst fan element features built-in electronic reverse-polarity protection and active overload limiting mechanisms to suppress unexpected electrical anomalies.
High Reliability for TMR Environments: Built with a low failure rate footprint and resilient components to match the up-time demands of safety-instrumented systems without triggering spurious trips.
Other Models in the Same Series
The broader ICS Triplex Trusted architecture incorporates various processing and power distribution modules designed to operate in identical environments:
Processors & Controllers: T8110 / T8110B / T8110C Trusted TMR Processor Modules, T8310 / T8310C Expander Processors.
Communications Modules: T8151B / T8151C Communications Interfaces, T8122 Modbus Master Modules, T8170 Gateway Systems.
Power Infrastructure: T820X Power Supply Racks, T8225 $24\text{ Vdc}$ Power Supply Units, T8290 / T8292 Output Power Distribution Components.
Installation and Maintenance
Installation Guidelines
Chassis Placement: Secure the $2\text{U}$ high T8270 chassis within the 19-inch rack footprint on a basis of one fan tray per individual module chassis layer. Verify that the physical baffle plate faces upward to block direct recirculation loops.
Cable Interconnection: Connect the main power line using the dedicated TC-011-01 fan power cable leading from the T8292 Power Distribution PDU.
Up to 5 individual Fan Trays or Roof Fan units may be driven sequentially from a single distribution circuit breaker loop.
Terminal Block Configuration: Ensure the $0\text{ V}$ neutral common return link is fastened securely down to the terminal block designated as TB1 to prevent ground loops.
Maintenance and Troubleshooting
Fuse Inspection: If a pair of fans fails simultaneously, check the internal $250\text{ mA}$ anti-surge fast-acting fuses for open-circuit faults.
Thermal Testing: Inspect fan velocity patterns if ambient temperatures inside the cabinet scale higher than $