Powered by 24 V DC, the unit incorporates four industrial axial fans paired with air duct baffles to optimize airflow paths. Together with the overhead T8271 top-mounted fans installed at the cabinet top, it forms a complete vertical circulating cooling system. This design eliminates heat accumulation generated by controllers and I/O modules during prolonged operation, mitigating risks such as spurious trips of the safety system and accelerated hardware degradation caused by high temperatures. It is suitable for long-term continuous operation in high-safety industrial sites including petrochemical plants and power stations.
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Model Code Decoding
Full breakdown of T8270 model designation:
- T8: Identifies auxiliary accessories supporting the Trusted 8000 Safety Instrumented System
- 2: Classification code for auxiliary components of cooling and power supply types
- 70: Exclusive serial number for 24 V DC rack-mounted fan traysThere are no extended suffix variants. The T8270 is the only 2U rack 24 V fan unit across the whole series, paired with the overhead cooling unit model T8271.
Core Product Features
Mechanical Structural Features
Standard 19-inch rack enclosure with 2U height; dimensions: 88 mm × 483 mm × 267 mm, net weight 1.8 kg. Four fans are vertically rear-mounted, and air duct baffles are integrally die-cast. The unit is fully assembled and requires no extra fitting.
Electrical Performance Features
Power Supply: Dual redundant 24 V DC input. Pin definition: Pin 1 = 24V-1, Pin 2 = 0 V, Pin 3 = 0 V, Pin 4 = 24V-2. SKT1 serves as input port and SKT2 as output port for cascading downstream fan units.
Protection: Each fan is fitted with an independent 250 mA surge protection fuse; every single fan integrates reverse polarity and overload electronic protection circuits.
Power Consumption: 4 W per fan group, total power consumption of the unit reaches 8 W.
Air Volume: Rated speed of each fan is 3100 rpm, delivering an airflow of 69 m³/h (40.6 ft³/min) per fan.
Environmental & Service Life Features
Single fan MTBF: 700,000 hours at 40°C; 35,000 hours at 70°C
Noise Level: 32 dB per fan
Environmental Protection: Tolerates wide humidity range without condensation; complies with industrial standards for explosion-proof matching environments.
Application Industries
Oil & Gas: Cabinet cooling for SIS safety control systems of oil & gas extraction, long-distance transmission pipelines and refining plants
Power Industry: Safety protection cabinets for thermal power, nuclear power and gas turbine generator units, as well as boiler FSSS systems
Fine Chemicals: Safety instrumented systems for reaction kettles, distillation units and hazardous chemical storage facilities
Coal Chemical Industry: Integrated safety control cabinets for coal-to-olefin and synthetic ammonia processes
Pharmaceutical Industry: Explosion-proof safety control systems for high-risk synthesis sections
Rail Transit: Safety interlock control cabinets for large stations
Product Comparison (T8270 vs T8271)
Mounting Position: The T8270 is a 2U rack-mounted unit installed at the bottom of the enclosure; the T8271 is an overhead unit mounted on the top of the cabinet.
Functional Positioning: The T8270 provides forced intake cooling for modules inside the enclosure; the T8271 exhausts hot air out of the cabinet.
Fan Configuration: The T8270 comes with four built-in Papst 8414NG fans; the fan specifications and quantity of the T8271 are incompatible and cannot be interchanged.
Power Cascading: Multiple T8270 units can be connected in series for power supply; the T8271 only serves as the terminal device in the cascade and cannot supply power to subsequent units.
Single Enclosure Matching Rule: Each control enclosure must be equipped with one T8270. Only one T8271 is required for the entire cabinet to work with all T8270 fan trays.
Matching Supporting Products
Power Supply Accessories
T8292 Fan Power Distribution Unit: Dual 24 V DC 3 A output, capable of driving up to five T8270 units plus one T8271 unit per unit.
Cable Accessories
TC-011-01 Special Fan Interconnection Cable: Used for connections between T8292 and T8270, multiple cascaded T8270 units, and T8270 and T8271.
Cooling Accessories
T8271 Cabinet Overhead Exhaust Fan Unit: Forms a complete circulating cooling system when used together with the T8270.
System Enclosure Accessories
T8100 Main Controller Enclosure and T8300 Expansion Enclosure: Each enclosure is fitted with one T8270 at the bottom.
FAQ
Recommended Trusted Series Models
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