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DGC-2020HD Power Input
4 • Power Input
Control power for the DGC-2020HD is typically supplied by the genset starter battery. Power from the
battery is supplied to an internal power supply that provides power for DGC-2020HD logic, protection, and
control functions.
Nominal Voltage Input and Acceptable Range of Input Voltage
A nominal voltage of 12 or 24 Vdc within a range of 6 to 32 Vdc is accepted. Control power must be of the
correct polarity. Although reverse polarity will not cause damage, the DGC-2020HD will not operate.
Terminal Assignments
Input power is applied to terminals 48 (BATT+) and 49 (BATT–), with terminal 50 (CHASSIS GND)
serving as the chassis ground connection.
Power Consumption
The amount of power consumed by the DGC-2020HD varies based on the selected operating mode. The
power saving Sleep mode consumes 12.7 watts with all relays de-energized and analog outputs disabled.
Normal Operational Mode consumes 18.1 watts in Run mode with the LCD heater off, START and RUN
relays energized, six programmable relays energized, and analog outputs enabled. Maximum Operational
Mode consumes 25 watts in Run mode with the LCD heater on, all relays energized, and analog outputs
enabled.
Battery Ride-Through Capability
Starting at 10 Vdc, the DGC-2020HD withstands cranking ride-through down to 0 Vdc for 50 milliseconds.
Fuse Protection
To follow UL guidelines, a 5 A maximum, 32 Vdc supplementary fuse, rated for no less than 26 A
2
s, must
be implemented in the battery input circuit to the DGC-2020HD.
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