American Power Conversion MX28B200 user manual Mechanical, Power Shelf Control Unit

	voltage (54.5 VDC).
Boost/Equalize Trim Pot	The boost/equalize pot is used to adjust the
	default boost equalize voltage (57.5 VDC).

6.4. Controls and Indicators

Power Shelf Control Unit

Major (Red)	On when Major Relay is de-energized*
Minor (Yellow)	On when Minor Relay is energized
Normal (Green)	On when no alarms are active
ALM 1 (Red)	On when Output Relay 1 is energized
ALM 2 (Red)	On when Output Relay 2 is energized
ALM 3 (Red)	On when Output Relay 3 is energized
ALM 4 (Red)	On when Output Relay 4 is energized
ALM 5 (Red)	On when Output Relay 5 is energized
ALM 6 (Red)	On when Output Relay 6 is energized
MIN (Red)	On when Minor Relay is energized
MAJ (Red)	On when Major Relay is de-energized*

6.5. Mechanical

Dimensions	15.75” high x 23” wide x 17.5” deep (MX28B-200)
	22.75” high x 23” wide x 17.5” deep (MX28B-400)
Weight	Housing	85 lbs. (MX28B-200)
		110 lbs. (MX28B-400)
	Rectifier (each)	11 lbs
Color	Dawn Gray
MX28B200/400 –48 VDC User’s Manual (990-9133)		Page 49