Wiring and Connections
10
Mi Series Audio Controllers
Cable Type
The Mi Series Controller is cabled using standard 4-conductor speaker cable originating at the MRC
passing through the Keypad and terminating at the speaker location. AMX generally recommends using
a bundled 4 conductor 16 gauge stranded copper wire in a single continuous run.
RF Interference
Shielded cable is generally not required for audio installations. Although the Mi Series Controller does
generate radio emissions, it uses a digital signaling path during command entry. These emissions have
been accommodated for in design and conform to RF emission standards. There are normally no
ongoing data communications in the circuit path. Communications only occur at the time a command is
issued from a zone. However many other systems do use microprocessor systems where the cabling may
be in close proximity such as telephone and security systems, and it is possible for different systems to
interfere with each other. If you face an installation where your cable runs are in parallel to these types of
systems you may consider shielded cable to the keypads. In this case ground the drain wire by
connecting it to the chassis of the Mi Series Controller.
Distribution Wiring
In general, wiring is installed in a single continuous run between the Controller, the Keypad and the
speaker location. Other cable routing options such as a home run to a common wiring distribution point,
integration with home automation systems, or split zone applications can be significantly different than
the general information presented here. These applications are left to the installer’s discretion and
experience. Examples of common wiring options can be found in the Special Wiring Configurations
section of this document.
Considerations for New Construction Installations
It’s generally accepted to run the 2 and 4 conductor speaker cables inside walls, in the attic and between
the joists in the basement or crawl space. When installing cables within walls, drill the holes in the
middle of the studs to avoid having them damaged by screws or nails that could penetrate the cable. Use
metal nail guard plates where necessary to protect the cable from future construction damage or from
something like nails/screws that are installed to hang future pictures or shelving. When running cables in
the attic or crawl space, run them in such a way that they will be out of harm, where they will not be
stepped on, snagged, punctured, or could pose a safety hazard.
Do not run cable thru the return air path that utilizes the wall or ceiling space as the plenum.
Securing the Cables
We recommend using electrical cable straps to keep the installation neat and secure. We do not
recommend stapling the cables as a single misplaced staple can cause a short that causes trouble during
operations and set-up. Do not leave the wires lying in the dirt under the crawl space. Neatness counts in
a professional installation.
Keypad “Rough In” Locations
The keypad device itself will fit in a standard electrical box or new construction plate and you should
install 1 or 2 gang (as required) standard electrical boxes to accommodate them before the drywall has
been put into place. Keep in mind that because these are low voltage applications, plastic electrical boxes
are generally adequate for the keypad, but check local building code requirements to be sure. The high
voltage electricians on the job site will know which electrical box is appropriate and within code.These
emissions have been accommodated for in design and conform to RF emission standards.
To Next Page
Loading...
