HP Array Controller HSG V8.7 Software - Manual (Page 194)

Glossary
Glossary–6 UltraSCSI RAID Enclosure
ECB
External cache battery. A device that provides backup power to a
cache module for sustaining memory retention.
electromagnetic interference
See EMI.
electrostatic discharge
See ESD.
EMC
Electromagnetic compatibility.
EMI
Electromagnetic interference. The impairment of a signal by an
electromagnetic disturbance.
EMU
Environmental monitoring unit. The device that monitors the status of
the UltraSCSI RAID enclosure to include power, intake air
temperature, blower status, and so forth, detects error and fault
conditions, displays these conditions, reports the conditions to the
user and the array controller, and, in some cases, implements
corrective actions.
enclosure connector
Any connector that is physically part of an enclosure (for example,
pedestal, deskside enclosure, cabinet, and so forth).
environmental monitoring unit
See EMU.
ESD
Electrostatic discharge. The discharge of a potentially harmful static
electric voltage as a result of improper grounding.