American Power Conversion MX28B4800, MX28B2400 manual Controls and Indicators, Rectifiers

8.2.DC Output (with either 1MRF28H54BV Rectifiers and 1MRF28H54BV50 Rectifiers)

Nominal Output Voltage (factory set)	54.5	VDC
Operating Voltage Range	44 –	58 VDC
Rated Output Current (per Rectifier)	50 A
Rated Output Power (per Rectifier)	2800 W (45ºC)
Efficiency	91% Typical

8.3. Controls and Indicators

Rectifiers

Input Healthy LED	AC power present.
Output Healthy LED	DC output voltage within operating range (-39.5 to –59.5 VDC).
Output Current LED	On when rectifier is supplying current.
Thermal Control LED	On when one of three internal sensors is above 90ºC
Current Limit LED	On when rectifier is in current limit.
Overvolts LED	On when rectifier is above 57 Volts. (Must be powered down to reset)
Overtemp LED	On when one of three internal sensors is above 130ºC. Power
	Conversion is inhibited.
Fan fail LED	On when Fan is running too slow.
Standby LED	On when the unit is in the standby mode. No output power is
	produced. Rectifier is still active
+V Test Point	Rectifier Voltage can be measured with a voltmeter between COM
	and +V.
COM Test Point	Negative reference for both +V and +I
+I Test Point	Rectifier Current can be measured with a voltmeter between COM
	and +I.

MX28B1200/2400 MX28B1200/4800 –48 VDC User’s Manual Page 61