NMB Minebea GmbH (UK) announced a new fan tray, which includes six fan units, each maintaining 150 CFM of airflow. The fan speeds are regulated in accordance with a pre-programmed speed versus temperature profile, minimizing acoustic noise, cold air thermal shock and current spikes at power-up.
The supply voltage range of -39Vdc to -75Vdc makes the new fan trays suitable for both -48V and -60V applications. Benefits include a hot-plug-in connection to a backplane system by slide-in, blind-mating connectors. An alarm display can be attached to the front of the tray to indicate the states of various signals from the host backplane. High reliability is guaranteed by careful de-rating of all components.
The new fan tray is particularly suited to work continuously under adverse environmental conditions. Operating temperature ranges from -10 to +65 degrees C and will restart after exposure to -40 to +65 degrees C. Safety features include fan cut-off in the event of fire and both visual and backplane alarms signalled in the event of power feed loss, fan fail or thermistor failure. The fan tray assembly has a minimum mean time between failures of 1,000,000 hours at 25 degrees C and has full CSA, NEMKO and CE approvals.
