A commercial-grade standard PC powers your Home Management System (HMS).
Typically this gets mounted in a conditioned mechanical space with good
accessibility to all parts of the home. (You can never have too much conduit!)
Depending upon the subsystems integrated with your HMS, you may have two or
more completely separate and independant CPUs within the PC to offload
some functions and features from the primary CPU.
Standard on most systems is a redundant hard drive system. In the
unlikely event of a crash (we borrowed that line from the airlines!) of your
primary hard drive, you simply turn a key on the faulty drive, reboot the
computer, and you're back up and running off the backup drive.
The subsystems integrated with your HMS are all certified by ESC
before being included in your home's HMS design. The
certification process
ensures that all integration issues with a subsystem are known
before your HMS design is committed to it. This eliminates costly design
changes and surprises when your system is installed and commissioned.
When it comes to the home you have to live in and the HMS you have to
live with, it truly is better to measure twice, cut once!
Protecting your HMS and your subsystems from each other is the main reason
optical isolation and surge suppression hardware is standard on all
installations. The optical isolation hardware prevents communication failures
due to voltage differences between different parts of your home, and almost
every home has these voltage differences. The optical isolation also provides
our lowest level of surge suppression.
Triple-protection surge suppression hardware prevents voltage spikes, i.e.
lightning, from traveling between your HMS and the connected subsystems.
Your HMS is connected by a wire web to many different subsystems in
your home. Each of these subsystems in turn usually have their own wire
webs connecting them to their controlled devices. On the outer edges
of this multilayered web are devices like air handlers, security cameras
(some probably high in trees or on metal poles), gate controllers at the far
edge of your property, or simply the Jacuzzi. Most of these devices are
just begging for a good lighting strike, and if not these, there is always
the power company's transformer on a pole nearby.
The reason for surge suppression as a standard feature is lightning's
ability to travel into the HMS through any of the attached devices
that happens to take a hit. Once inside the HMS, it could travel
back out the wire web to all other attached devices in the home.
The surge suppression package greatly reduces the possibility of
lightning damage spreading through the HMS. For lightning to damage
more than the subsystem it hits, it has to breach the surge suppressor
on the way in to the HMS and then get past a second surge suppressor
on the way out to a different subsystem.
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