American Power Conversion MX28B200 Sys LT Thr, Sys LV Alm, Sys LV Thr, 50.00, Sys Temp, 26.7 C

PARAMETER NAME/	DESCRIPTION	DISPLAY SCREENS /
[MENU LOCATION]		DEFAULT SETTINGS
System Low Temperature	System Temperature is ambient	Sys LT Thr	m+
Threshold	temperature measured inside the	0.0 C
Security Level {1}	controller. An alarm will be reported if
[SYSTEM/SET-ALM]	temperature is lower than the
	temperature entered.
System Low Voltage Alarm	The output relay energized if the System	Sys LV Alm	m+
Security Level {1}	Voltage is below the System Low Voltage	Minor
[SYSTEM/SET-ALM]	threshold.
System Low Voltage Threshold	System Voltage is bus voltage measured	Sys LV Thr	m+
Security Level {1}	by the controller. An alarm will be	-50.00 V
[SYSTEM/SET-ALM]	reported if voltage is lower than the
	voltage entered.
System Temperature	System temperature measured within the	Sys Temp	+
{Status Only}	control unit.	26.7 C
[STATUS]
System Voltage	System output voltage measured	Sys Voltage	+
{Status Only}	between the MX28B DC power plant -	-54.00 V
[STATUS]	48V and return buses.
Test Major Relay	Setting this parameter to “ON” de-	Test Maj Rly	m+
Security Level {1}	energizes the Major Relay and turns on	OFF
[SYSTEM/DIAG]	the “MAJ” LED on the control unit front
	panel. In normal operation Major Relay
	is energized so that when a loss of –48
	VDC power occurs, the relay will change
	state.
Test Minor Relay	Setting this parameter to “ON” energizes	Test Min Rly	m+
Security Level {1}	the Minor Relay and turns on the “MIN”	OFF
[SYSTEM/DIAG]	LED on the control unit front panel.
Test Relay 1	Setting this parameter to “ON” energizes	Test Relay 1	m+
Security Level {1}	Relay 1 and turns on the “ALM1” LED on	OFF
[SYSTEM/DIAG]	the control unit front panel.
•	•	•
•	•
•	•	•
Test Relay 6	Setting this parameter to “ON” energizes	•
Security Level {1}	Relay 6 and turns on the “ALM6” LED on	Test Relay 6	m+
[SYSTEM/DIAG]	the control unit front panel.	OFF
Test Relay Enable	This parameter must be set to “Enable”	Test Relay En m+
Security Level {1}	to permit the eight output relays to be	Disable
[SYSTEM/DIAG]	manually tested; otherwise, the state of
	the relays will be per system conditions.
Time	Internal system clock time (24-hour	Time	m+
Security Level {1}	format). Used as a date stamp in the	9:00:25
[SYSTEM/DATE]	event log.

Page 36 MX28B200/400 –48 VDC User’s Manual (990-9133)