Two Identical Positive Voltages With a Common
Negative (Refer To Fig. 11)
Some electronic equipment requires two identical positive
voltages with a common negative. A good example of this would
be a digital car clock where there are two +12 volt inputs and a
common negative. Using both supplies in the parallel tracking
mode would provide the simplest hook-up and operation. This
type of “split supply” operation is obtained as follows:
1. Connect a ground strap between the “A” supply’s negative
terminal and ground.
2. Set the desired voltage and maximum current using the “A”
VOLTAGE and CURRENT controls.
3. Turn off the power supply and the equipment to be powered
during hook-up.
4. Connect the positive polarity inputs of the circuit to be
powered to the positive (red) terminals of the supplies and
connect the common negative input of the circuit to be
powered to the “A” supply’s negative (black) or ground
(green) terminal.
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