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Page 36 MX28B200/400 –48 VDC User’s Manual (990-9133)
PARAMETER NAME/
[MENU LOCATION]
DESCRIPTION DISPLAY SCREENS /
DEFAULT SETTINGS
System Low Temperature
Threshold
Security Level {1}
[SYSTEM/SET-ALM]
System Temperature is ambient
temperature measured inside the
controller. An alarm will be reported if
temperature is lower than the
temperature entered.
Sys LT Thr m+
0.0 C
System Low Voltage Alarm
Security Level {1}
[SYSTEM/SET-ALM]
The output relay energized if the System
Voltage is below the System Low Voltage
threshold.
Sys LV Alm m+
Minor
System Low Voltage Threshold
Security Level {1}
[SYSTEM/SET-ALM]
System Voltage is bus voltage measured
by the controller. An alarm will be
reported if voltage is lower than the
voltage entered.
Sys LV Thr m+
-50.00 V
System Temperature
{Status Only}
[STATUS]
System temperature measured within the
control unit.
Sys Temp +
26.7 C
System Voltage
{Status Only}
[STATUS]
System output voltage measured
between the MX28B DC power plant -
48V and return buses.
Sys Voltage +
-54.00 V
Test Major Relay
Security Level {1}
[SYSTEM/DIAG]
Setting this parameter to “ON” de-
energizes the Major Relay and turns on
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 Maj Rly m+
OFF
Test Minor Relay
Security Level {1}
[SYSTEM/DIAG]
Setting this parameter to “ON” energizes
the Minor Relay and turns on the “MIN”
LED on the control unit front panel.
Test Min Rly m+
OFF
Test Relay 1
Security Level {1}
[SYSTEM/DIAG]
•
•
•
Test Relay 6
Security Level {1}
[SYSTEM/DIAG]
Setting this parameter to “ON” energizes
Relay 1 and turns on the “ALM1” LED on
the control unit front panel.
•
•
•
Setting this parameter to “ON” energizes
Relay 6 and turns on the “ALM6” LED on
the control unit front panel.
Test Relay 1 m+
OFF
•
•
•
Test Relay 6 m+
OFF
Test Relay Enable
Security Level {1}
[SYSTEM/DIAG]
This parameter must be set to “Enable”
to permit the eight output relays to be
manually tested; otherwise, the state of
the relays will be per system conditions.
Test Relay En m+
Disable
Time
Security Level {1}
[SYSTEM/DATE]
Internal system clock time (24-hour
format). Used as a date stamp in the
event log.
Time m+
9:00:25