Updated pic with the addition of 3 UPSes, a home made 2U fan module, DMXIS lighting controller and a DMX splitter since my post last May. The DMX splitter is so that I can add one DMX signal cable to each snake that carries power and audio to each PA speaker & light bar, rather than daisychaining from light to light.
The blue USB cables are breakout loops from the PC to the mixer and USB hub, so that I can quickly plug in another PC or sound interface if something breaks.
The 3 UPSes are low voltage, and set at
- 19V - for the PC and WIFI router.
- 15V - for the MOTU mixer),
- 12V - for the Roland keyboard and the 13 port powered USB hub
A little cable tidying to do… Each UPS takes 3 18650 Lithium-Ion batteries and is an OpenUPS2 from here. They are bolted to the underside of the top of the rack.
I’m one of the few that prefers low voltage inputs to equipment so that I can UPS enable them like this.
A 240V UPS would not have fitted into this rack and would have weighed much much more because it uses lead acid batteries.
These UPSs have saved me from a 3 minute restart and potential file corruption a number of times since I put them in last September.
The 3 green lights/buttons on the front of the rack show me the UPS status and are also switches so I can easily turn them off after use. Otherwise the UPSes would keep power going until their batteries flatten.
