ICS Triplex T8270 Trusted Fan Tray

Overview

The ICS Triplex Trusted T8270 fan tray is the Trusted 24 V dc fan assembly, rack mounted, part of the cooling system of the Trusted safety and control platform manufactured by ICS Triplex, now Rockwell Automation. The original listing identifies it as the ICS Triplex T8270 24 V dc fan assembly, rack mount, and the official Rockwell documentation confirms the product description as the Trusted 24 Vdc Fan Assembly, Rack Mounted.

The T8270 fan tray provides forced cooling within a module rack of a Trusted system, with one fan tray fitted per module chassis, so that the safety and control modules inside the rack operate within their temperature limits. A fully populated module rack includes up to five fan trays and may also include a roof fan unit.

Engineering & Design

The T8270 fan tray comprises four fans mounted vertically at the rear of a 2U high chassis, with a baffle that prevents the air drawn by the fans from flowing through the module chassis immediately above the tray. Each fan is a Papst 8414NG unit capable of moving 69 m³/h at a nominal rotor speed of 3100 rpm, with electronic overload and reverse polarity protection, and the tray is designed for low noise operation at 32 dB per fan.

The T8270 fan tray is powered from dual 24 V dc supplies, with the fans supplied in pairs through internal 250 mA anti-surge fuses, and the supply range is 18 to 28 V dc. Power is derived from a Trusted Power Distribution Unit miniature circuit breaker (24 V dc, type T8292) through a Trusted fan power cable, type TC-011-01. The fan MTBF is 70,000 hours at 40 °C.

Key Features

• T8270 fan tray, Trusted 24 V dc, rack mounted (PD-T8270)
• Four Papst 8414NG fans, 69 m³/h each at 3100 rpm
• Forced cooling for one module chassis per tray
• Low noise operation, 32 dB per fan
• Dual 24 V dc supply (18-28 V dc) with 250 mA anti-surge fuses
• Fan MTBF 70,000 hours at 40 °C
• 2U high, 19 inch rack mounting

Applications

• Cooling of Trusted controller and expander racks
• Thermal management of safety instrumented systems
• Replacement fan tray for existing T8270 installations
• Spare stock for Trusted system maintenance

Cooling Architecture in a Trusted Module Rack

The ICS Triplex T8270 is not a general-purpose 19 inch fan panel dropped into a safety cabinet; it is a defined element of the Trusted system’s thermal design, and understanding how the airflow is routed explains why substituting a generic tray is a poor idea. Rockwell Automation specifies one T8270 fan tray per module chassis, and the internal baffle deliberately stops the air the fans draw in from passing straight up through the module chassis immediately above the tray. Instead, the fans exhaust into the rear of the system cabinet, where the air is drawn upwards and out of the enclosure by the roof-mounted fan unit described in Rockwell publication PD-T8271. Cooling is therefore a cabinet-level flow path, not a local chassis draught, and each element of that path has to be present for the modules to stay inside their rated temperature band.

Power routing follows the same discipline. Each tray takes dual 24 V dc feeds derived from a Trusted Power Distribution Unit miniature circuit breaker of type T8292, delivered over a Trusted Fan Power Cable type TC-011-01, and the same cable type daisy-chains the fan trays and roof fan unit through sockets SKT 1 and SKT 2. The two sockets carry identical pin allocations: pin 1 is 24 V-1, pins 2 and 3 are 0 V, and pin 4 is 24 V-2, with the 0 V supply landed on terminal block TB1. Fans are supplied in pairs behind internal 250 mA anti-surge fuses, and each fan carries electronic protection against overload and reverse polarity, so a single fan fault or a miswired feed does not take the whole tray down. Rockwell states that five fan trays and roof fan units together is the maximum that may be powered from one Trusted Power Distribution Unit MCB, which is the figure that sets rack population limits during design.

Environmental Limits and Maintenance Considerations

The published environmental envelope for the ICS Triplex T8270 fan tray is an operating temperature of 0 °C to +60 °C (+32 °F to +140 °F), a non-operating temperature of −20 °C to +70 °C (−4 °F to +158 °F), and a relative humidity range of 10 % to 95 % non-condensing that applies equally to operation, storage and transport. The supply voltage range is 18 V dc to 28 V dc and total power consumption is 2 x 4 W. Rockwell refers the full environmental qualification to document 552517, which is the reference a site safety file should cite rather than a supplier data sheet. The applicable product description is Rockwell Automation publication PD_T8270 Issue 11, written against Trusted Release 3.6.1.

For maintenance planning, the individual fan MTBF is quoted as 70,000 hours at 40 °C and 35,000 hours at 70 °C. That halving with temperature is the practical argument for keeping cabinet ambient under control in Omani plant rooms, and for treating fan trays as a scheduled-replacement item on long-running Trusted installations rather than waiting for a thermal alarm. At 88 mm high (2U), 483 mm wide (19 inch) and 267 mm deep, weighing 1.8 kg, the tray is a straightforward mechanical swap once the rack is prepared, and Seven Star LLC supplies the T8270 to safety-system maintenance teams across Muscat, Sohar, Salalah and the wider GCC with the part number verified against the customer’s Trusted rack configuration before dispatch.

Specifications

Compatibility & Integration

The T8270 fan tray fits the module rack of a Trusted system, powered from the Trusted Power Distribution Unit (24 V dc MCB, type T8292) through the Trusted fan power cable TC-011-01, and the same cable type interconnects the fan trays and roof fans in a module rack. One tray is fitted per module chassis, and up to five trays or roof fan units can be powered from a single MCB.

Before installation, confirm the power connection and the position of the tray in the rack. Our team can verify the part number and the power cabling requirements against your Trusted system before dispatch.

Ordering Information

To order the ICS Triplex Trusted T8270 fan tray from Seven Star LLC, quote the part number and your system details. We confirm availability and delivery to your site in Oman or anywhere in the GCC, and we verify the part against your Trusted rack configuration before dispatch.

Why Seven Star LLC

Seven Star LLC supplies safety system components and cooling spares to industrial customers across Oman and the wider GCC region. Every Trusted T8270 fan tray we supply is checked against the part number before dispatch, and our team confirms the part matches your system before you order.

FAQ

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