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Can you connect two grounds to one power supply?
Yes the two grounds can be connected to each other, but both should be DC voltages I am not aware of any standard that will prevent you from connecting grounds of different power supplies .. Of course, you have to implement safety precautions not to expose users to dangerous high voltages ..
Can you connect two GND togheters together?
However, if both ground are connected, voltages sources with have the same reference, and so be coherent to each other. Please mind you have to connect grounds with little resistance. So yes, most of the time you have to connect GND together.
How are power supplies connected to each other?
A common topology employed to increase output power is to connect the outputs of two or more supplies in parallel. In this configuration each power supply delivers the required load voltage while connecting the supplies in parallel increases the available load current and thus the available load power.
Is it safe to connect two power supplies?
All sorts of unwantted reactions could take place. For common electronics applications it’s generally safe to use a common ground for things like multiple power supplies in the range of -12 to +12 volts or so, the less current you’re dealing with the better.
Can a 0V be connected to the ground?
Normally you then connect the 0V to the ground, if to anything at all. If the ground is protective, it may only be connectd to the metalic case of the mechanical construction. The voltages inside will then float relative to the ground. This always depend on the type of equipment in use.
Can a power supply be connected to the chassis?
In such a case, it is usually better to connect the outer chassis to the local ground. The frame of a power supply might still be connected to the AC line ground, but then that shouldn’t be shorted to the chassis. Or, you ignore the AC line ground completely and tie the power supply frame and whole chassis to the local ground.