Dell PowerVault MD1220 Hardware Owner's Manual - Page 13
Enclosure Management Module
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Item Indicator, Button, or Icon Connector 4 Power switches (2) 5 Power supply/cooling PS 2 fan module Description The power switch controls the power supply output to the enclosure. 600 W power supply. For more information, see "Power Indicator Codes" on page 17. Enclosure Management Module Each EMM provides the following data path and enclosure management functions for your enclosure: • Monitoring and controlling enclosure environment elements such as temperature, fan, power supplies, and enclosure LEDs. • Controlling access to hard drives. • Communicating enclosure attributes and states to the host server. NOTE: At least one EMM must be installed in the enclosure. If only one EMM is installed in the enclosure, it must be installed in the primary EMM bay and a blank must be installed in the secondary EMM bay. See "Installing an EMM Blank" on page 36. About Your Enclosure 13
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