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Savant IP Audio Deployment Guide
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Copyright © 2019 Savant Systems, LLC
Appendix D: Uninterruptible Power Supply (UPS)
Savant does not recommend any particular brand or model of UPS, however it is important that the UPS employed not only functions during complete
power loss, but also protects devices during events like surges and brownouts. It is not uncommon for a residence or small business to see variations in
power service that do not result in a complete black-out. These periods can be the most frustrating to end users as they do not realize what the cause of the
operation disturbance may be.
Below are some specific design considerations for planning power management solutions.
• Pure Sine Wave Inverter
.
• Online/double-conversion power supply
- This type of UPS always supplies power to the equipment. This will eliminate any period where the power is
interrupted. This will also address many issues if the site has regular “brown outs” or if the site has frequent under or over voltage situations.
• Max power output
- The UPS needs to be properly sized for the equipment connected to it, and unnecessary loads should not be included on the UPS.
For instance, putting an audio amplifier on the UPS will either drive up the cost of the UPS system to support the load or drastically shorten the period
that the UPS can keep devices up and running.
Devices such as modems, routers, switches, APs, PoE injectors, and similar should also be considered. This is especially important if software that relies
on the network for communication is in use. Power cycling segments of the network can cause network conflicts. It is important to consider this during
network design and configuration.
• “Graceful” shut down
- The UPS should communicate with the devices connected to it so that when necessary they are properly shut down. Many UPS
manufacturers offer a software suite so that hard-drive based devices may go through a ‘graceful’ shut down procedure. This feature should be vetted in
a test environment prior to implementation so that the integrator understands how the system will respond during shutdown and start-up periods.
• Power consumption monitoring
- This feature allows monitoring of the draw from each outlet to determine if an item is running via a remote console.
• Remote Access
- The ability to remotely power cycle an outlet or a group of outlets.
IMPORTANT!
Be VERY CAUTIOUS when using a UPS with the ability to power cycle an outlet remotely. Devices with hard drives may be damaged by this action.
Savant Hosts in particular need to be shut down correctly in order to restart correctly when power is restored.
• Generators
- Generators are not a replacement for a UPS, and should be considered as an augment to the UPS. Having a generator on site increases
the need for a UPS because the equipment needs greater protection from power cycles when the generator comes online during testing. A generator is
also likely to introduce electrical conditions like under and over voltage or frequency modulation while running. All of these circumstances stress power
supplies and hard drives increasing the odds of premature failure.
• Savant does have a variety of IP & Serial controlled UPS devices currently profiled (these can be found under Trigger Devices).
• The UPS profiles are designed to give the integrator a set of variables and triggers to perform actions with. The Savant User Interface has no default
screen(s) that will auto populate for any of these devices.
• For feedback: All devices support a variety of different state information and should be tested in a configuration to confirm expected state change
behavior before configuration of any related state triggers.
• For Control: All control commands and actions should be tested prior to deployment to confirm expected functionality.
