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A 4mm banana socket is taken to panel bond point which then is connected to the PSU2's 0VB terminal.
Personal Note...
One has to a little careful when using the word 'ground'. I sometimes talk about local ground
and 0V as being the same thing. This is technically incorrect but it is used a lot. I worked at
Marconi in the 80s and Soundcraft in the early 90s, and ground and 0V were used
interchangeably even by seasoned engineers. We'd talk about chassis ground, dirty ground,
signal ground and clean ground. They'd all be connected to 0V somewhere in the system but
the term ground was in common usage.
Ground, when used in this way, is then a local common reference connection tied to the 0V of
the unit's power supply. It is not the same as mains earth. Indeed, it may not even be tied to
mains earth in the unit in question.
Strictly speaking, electrical ground is mains earth and historically it was solely referred to as
that, but usage, incorrect or not, has meant a shift in the meaning. Ideally, we should call our
common reference connection within our unit as 0V and not use the term ground.
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