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Configuration
3–14
975-0400-01-01
Trigger Source Descriptions
Low Batt Voltage
Activates the auxiliary output when the battery voltage falls
below the trigger setting for the trigger delay time. Deactivates the auxiliary
output when the battery voltage rises above the clear setting for the clear delay
time. Use this setting if you want the auxiliary output to control a relay to
disconnect loads from a battery that is nearly discharged, or to activate a low-
battery-voltage alarm such as a buzzer or light.
Hi Batt Voltage
Activates the auxiliary output when the battery voltage rises
above the trigger setting for the trigger delay time. Deactivates the auxiliary
output when the battery voltage falls below the clear setting for the clear delay
time. This setting is useful for:
•
installations that have another external charging source such as a wind
generator or hydro generator connected directly to the batteries. The XW SCC
auxiliary output can control a relay to disconnect the external charging source
from the battery when the battery is in danger of being overcharged, or control
a relay to turn on a diversion load.
•
activating a high-battery-voltage alarm such as a buzzer or light.
•
activating a vent fan to disperse hydrogen from the battery compartment when
the batteries reach their gassing voltage.
Hi Array Voltage
Activates the auxiliary output when the PV array voltage
rises above the trigger setting for the trigger delay time. Deactivates the auxiliary
output when the PV array voltage falls below the clear setting for the clear delay
time. Use this setting if you want the auxiliary output to control a series latching
relay to disconnect the PV array from the XW SCC or trigger an alarm when the
PV array voltage exceeds the trigger setting (the XW SCC maximum operating
voltage is 140 Vdc).
You can also use the Hi Array Voltage trigger to control a relay to turn on a night
light. Set the Trigger Level to your nominal battery voltage and the Output Mode
to Active Lo. This will energize the relay and turn on the light whenever the array
voltage is insufficient to charge the battery bank.
Low Batt Temp
Activates the auxiliary output when the battery temperature
falls below the trigger setting for the trigger delay time. Deactivates the auxiliary
output when the battery temperature rises above the clear setting for the clear
delay time. Battery temperature is measured with a battery temperature sensor. Do
not use this setting if a battery temperature sensor is not installed. With this
setting, the auxiliary output can turn on an indicator alarm if the batteries are too
cold. A battery with frozen electrolyte will not accept a charge.
Important:
If the selected trigger source is Low Batt Voltage or Hi Batt Voltage,
changing the nominal battery voltage setting will reset the Trigger Voltage Level and
Clear Voltage Level settings to their default values.
Summary of Contents for XW-MPPT60-150
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