In a negative-common power supply, the common (COM) terminal for analog remote control is internally connected to the negative output terminal, placing them at the same potential. Therefore, when using analog control signals (e.g., Vcon, Icon, Vmon, Imon), the COM terminal on the external controller must be left floating and should not be grounded. Specifically, if the positive output terminal is grounded to operate the unit as a negative voltage source, grounding the remote control's COM terminal will create a short circuit across the power supply's output. This can lead to damage or malfunction of both the power supply and the control circuitry.
To prevent this issue, protective measures, such as ensuring the control signals are properly isolated, must be implemented. Adhering to these precautions is crucial to avoid equipment damage.
