Rugged enclosure system family: extra robust and highly flexible

September 11, 2013 // By Graham Prophet
For particularly high shock and vibration requirements of up to 40g Pentair has developed the Schroff Titan ATR system family. Based on its modular 19-in. subracks, which is an established platform for all levels of ruggedness up to about 25g, the Titan ATR system is suitable for civil and military aviation and space applications, including use on unmanned aircraft and helicopters, as well as other mobile equipment such as tanks or trains.

The Titan ATR (air transport rack) system family conforms to the standardized ½ ATR short dimensions (width x depth x height: 145 mm x 328.8 mm x 193.5 mm) and offers three 3 U slots with Open VPX profile for PCIe applications. Other topologies such as VME or CompactPCI are also available. A fourth slot can hold an Ethernet switch, which enables a multiprocessor system to be installed.

The fitted backplane operates at a data transfer rate of 10 Gbit/sec. It is linked directly to a transition module, eliminating the need for wiring, which tends to be susceptible to interference at the I/O connectors. The transition module is bolted directly onto the case and can be replaced easily.

The power supply unit, also supplied as standard, has an output capacity of 150W, input voltage of 28V, three output voltages (5V, 3.3V and ±12V) and operates at up to 85% efficiency. The typical bridging time of 4 msec can be increased to 50 msec by means of a capacitor bank.

Titan ATR systems can be equipped with high EMC and IP protection levels using integral gasketing. All input and output signals plus the PSU are also fitted with electrical filters. The system is thus fully shielded.

Cooling is achieved internally via conduction cooling and can be supplemented if required by forced air cooling from outside. For this purpose, the side panels are provided with cladded cooling fins, through which air is drawn from front to rear by means of a temperature controlled fan in the rear of the system. At an ambient temperature of 71°C, the system can extract 125W of dissipation loss and at 65°C up to 175W. Titan ATR systems are designed for ambient temperatures between -40 °C and +71 °C and a relative humidity of 5 to 95% (salt spray up to 5%). Constructed in corrosion-resistant hard anodised aircraft-grade aluminum, these Titan ATR systems weigh less than