Morningstar RELAY DRIVER Manuel D'installation, D'utilisation Et D'entretien page 15

Figure 4. Select a Control Type
3. The Control Type specifies the device from which variable
data will be polled and used in the Threshold Function. The
TriStar and Other Relay Driver options will poll the specified
device on the Meter Bus for variable data such as measured
battery voltage, load/solar voltage, and battery temperature.
The Standalone option uses variable data local to the Relay
Driver such as the on-board temperature sensor or channel
input voltages. The Control Type list may expand in the future
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