12 • Introduction SAM4s SPS-2000 Operator Manual v1.18
Uninterruptible Power Supplies (UPS)
On sites where there is a known problem with temporary power outages or brownouts, battery
back-up devices should be installed. Most battery back-up devices are known as
Uninterruptible Power Supplies (UPS). When power to equipment is momentarily lost, the
UPS devices draw power from an internal ‘gel cell’ battery to keep the equipment operating.
The length of time these devices power the POS system is dependent on the capacity of the
internal batteries. Many sizes are available, but typically the units installed on POS
equipment keep the computers powered for about 20 minutes. This will give servers and
managers time to settle bills, print checks and power down the system in an orderly fashion.
CRS recommends POWERVAR Security One Series Uninterruptible Power
Supplies, the most advanced, line-interactive, true sine wave UPM products
available for your application. Each model is designed to provide total protection
for your system from a complete range of power quality problems. Security One
Series Uninterruptible Power Supplies are available with or without the patented Ground
Guard conditioning circuitry.
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