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WIRE SIZE IS EXPRESSED BY ITS AWG (AMERICAN WIRE GAUGE) NUMBER – THE LOWER THE
NUMBER, THE LARGER THE WIRE, FOR EXAMPLE, 20 AWG IS PHYSICALLY LARGER THAN 22 AWG.
12
4) Status Wiring: The Niles HT-MSU has status (power synchronization) ports for eight
home theater sources. The status connections for sources 1 through 6 (labeled SRC1
– SRC6) are RCA jacks that can sense video or a 12V DC voltage signal. The TV/7 and
RCV/8 (receiver) status connections are 3.5mm jacks that sense voltage signals. When
using video for status, a standard RCA cable can be used from that source. Alternatively,
when using 12V for status, a standard 22 gauge, 2-conductor cable (“zip-cord”) can
be used. Niles Accessory Cables (FG00724 or FG00933) can also be used (SEE THE
ACCESSORIES SECTION FOR MORE INFORMATION).
5) 12V Output and Relay Wiring: The HT-MSU has three 12V and three “Dry Contact
Closure” Relay Outputs that can activate mechanical devices such as motorized drapery
and projection screen systems, as well as a number of other automation devices. For
each device these outputs will control, standard 22 gauge 2-conductor cable (“zip-
cord”) can be used. Niles Accessory Cables (FG00724 or FG00933) can also be used.
Each relay is rated to handle 12V DC, up to 5 amps. (SEE THE ACCESSORIES SECTION
FOR MORE INFORMATION).
6) Expansion Cable: The HT-MSU has an Expansion connection that can be used to extend
the built-in RF radio away from the HT-MSU and/or for connection to and “sharing”
sources with future Niles multizone receivers (SEE SYSTEM CONFIGURATION #3 IN THE
SYSTEM DESIGN CONSIDERATIONS SECTION). This cable must be CAT-5 terminated
with RJ45 connectors (T568A TERMINATION PROTOCOL IS SHOWN IN THE INSTALLATION
SECTION 7).
7) Antenna Cable: The supplied extension cable is 10 foot long and is a RG59 CL rated
cable so it can be run through the wall. Extending the cable or using longer cable is not
recommended as this will drastically affect the RF reception. The antenna is only used
if a Niles RF Remote issued to control the HT-MSU.
PROGRAMMING PREPARATIONS AND WORKSHEET
The HT-MSU has a PC Configuration/Expansion port on the bottom edge that is used for configuring
(programming) the system. If the HT-MSU is being used by itself, the PC Configuration/Expansion
port will be empty and used to program the system (Figure 7).
A Worksheet is provided with the HT-MSU Home Theater Main System Unit and should be used
to organize all of the information an installer will need to configure the HT-MSU. The HT-MSU
worksheet is also available on the Niles website: www.nilesaudio.com.