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Distribution Monitor (DM)
The Distribution Monitor
13
(Figure 2) provides the system monitoring including AC voltage, and AC
current. In addition
Indicators on Distribution Monitor: OK LED (green) reports plant status.
Note: This LED will not be illuminated if the distribution monitor has an internal fault or if CB1 is
open.
System Controller
The System Controller
13
(Refer to Figure 2) allows the user to view plant status and change system
and inverter setpoints either from the front panel or through the serial interface located on the front
panel. A modem is optional for remote access; refer to the J
-
Drawing L20 and L22 for modem and
software ordering information. The System Controller is easy to use, convenient, and allows the user
to quickly change system setpoints without accessing the inside of the inverters.
Indicators on System Controller:
Controller LED (green) indicates that the Distribution Module has passed its internal self
-
test.
Inverter Minor LED (amber) is a summation alarm indicator and reports plant status in a variety
of ways, depending on the condition. The reported conditions are defined in the condition chart
provided in the Troubleshooting section.
Inverter Major LED (red) is a summation alarm indicator and reports plant status in a variety of
ways, depending on the condition. The reported conditions are defined in the condition chart
provided in the Troubleshooting section.
Adjustable Alarm Setpoints: Setpoints are adjusted through the System Controller.
Refer to Adjusting Setpoints for more detail.
Alarm Settings Associated with Plant: Settings are for 120 V
ac
and 48 V
dc
plants. Settings for 240
V
ac
and +24 V
dc
plants are in parentheses.
Plant Low Voltage Alarm Setpoint
Range 90.0 to 120.0 V
ac
(180.0 to 240 V
ac
)
Factory set to 95 V
ac
(190 V
ac
)
Plant High Voltage Alarm Setpoint
Range 110.0 to 140.0 V
ac
(220.0 to 280 V
ac
)
Factory set to 130 V
ac
(260 V
ac
)
Battery Low Voltage Alarm Setpoint (for –
48
Vdc input inverter system)
Range
-
42.0 to
-
55.0V
dc
(21.0 to 27.5V
dc
)
Factory set to
-
44.0V
dc
(22.0V
dc
)
Number of Redundant Inverters Setpoint
Range 0 to 5.
Factory set to 1.
Percent of Capacity Setpoint
Adjustable from 0% to 100% in steps of 10.
Factory set to 80%.
