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6.5. High-Side Output Power Master
The high-side output can be connected to a master power relay on the vehicle and feed power to other
vehicle systems, including the grid power connections. This allows the mVEC to control power going to
other vehicle systems, and minimize the current drawn by the system when ignition is switched “off”.
Caution: If the master power relay feeds the circuit controlling the starter motor system, voltage
drops can occur during ignition cranking. If the voltage drops below the operating voltage of the mVEC,
the master power relay will turn “off”.
When the default state of the mVEC’s high-side output is “on”, the output will turn “on” when the mVEC is
powered, without requiring another controller to send a command to the mVEC to turn it “on”.
The following shows an example of using the high-side output for master power:
Figure 26. High-side output master power
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