power supply0
power supply usage
console and power supply grounding
Console chassis ground is electrically connected to: the audio ground, pin- 1 of XLR connectors, the sleeves of 1/4” sockets,and to the terminal CON- SOLE GROUND at the rear of the power supply.
The AC
Sound system
redundant power supplies
The console power supply can be considered the single most important component in an entire sound system. If a power amplifier,a signal proces- sor or a console input goes down in the middle of a show, the show can still go on. But if the console loses its power supply, the show is over. For this reason, it is always good practice to incorporate redundant power supplies for mixing consoles used in professional sound reinforcement applications.
This should be considered a high priority even when using a very reliable power supply. In even the most carefully designed sound systems, each component runs the risk of failure at sometime or another.
Crest Audio uses two methods for attaching redundant power supplies to consoles. In both methods, the two (or more) power supplies should be kept on while the console is in use to insure a smooth transition in the event that one shuts off.
If one power supply drops in voltage or shuts off completely,the other unit takes over without any interruptions or audible glitches.As an added pre- caution,the two (or more) power supplies can be fed by separateAC lines. This will guarantee that the console does not shut off if one of theAC lines goes down.
multiple power supplies in-series
Crest Audio
p. 139
