Niles Audio MS120 Microphone User Manual


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INSTALLATION CONSIDERATIONS
Type of Cable
The MS120 connects to the Niles infrared main
systems unit or IRH610 sensor expansion hub
with an individual home run of CAT-5 cable.
When running wires inside walls, most states and
municipalities in the U.S. specify that you must use
a special type of wire. Usually, the requirement is
that the wire has a specific “CL” fire rating, such
as “CL-2” or “CL-3”. Consult your Niles dealer,
building contractor, or local building and inspection
department if unsure about which type of wire is
best for your application.
MS120 Mounting Location
The MS120 is ideal for use in applications when
tabletop, ceiling, or wall-mounting is undesirable.
Its small size and unobtrusive appearance makes
it ideal for installation in obscure, hidden locations,
in cabinet facings, or in the sensor knockout built
into Niles in-wall loudspeakers. Installing the
MS120 close to the primary location of the user
will ensure best performance.
The MS120 is designed to flush-mount almost
anywhere. Convenient mounting locations for the
MS120 are:
• In a cabinet door
• In a wall, or wall-plate
• Behind a speaker grille.*
NOTE: Some types of speaker grilles will reduce the
IR pickup range of the MS120. If unsure, test
the pickup range before permanently installing the
MS120 behind the speaker grille.
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We do not recommend this. The cable connected
to the MS120 can act as an “antenna” for
electrical noise. Locating the MS120 cable too
close to a light dimmer or switch may interfere
with the MS120. If you must locate the MS120
near electrical devices, install it in a separate
metal electrical box, ground the box to the
electrical system ground, and route the MS120
cable several feet away from all electrical wiring.
Avoiding Optical Feedback
If installing the MS120 in the same room as an IR
flasher, it is possible for the flasher’s IR output to
be picked-up by the MS120. This effect, known
as an optical feedback loop, can cause erratic
operation. Optical feedback is similar to acoustical
feedback: the howling or whistling sound heard in
a P.A. system when the microphone is too close to
the speaker.
To avoid optical feedback:
1. Re-position the flasher(s) and/or the sensor.
2. Use Niles MF1 or MF2 flashers and cover them
with the supplied IR blockers.
Using the MS120 with a Niles MultiZone
Keypad with an IR-Sensor Connection
The MS120 is fully compatible with any Niles
MultiZone Keypad with an IR-Sensor connection,
follow the wiring instructions in Figure 2. For
specific information see your Niles MultiZone
Keypad manual.
Receiving Range and Pickup Angle
The receiving range of the MS120 will vary
according to the IR output strength of the remote
control being used. Remote strength varies among
brands depending on the number and size of
batteries used, and how many IR emitters the
remote has. For example, remotes that operate
on two small AAA batteries and have only one IR
emitter are generally not as strong as remotes
that use the larger AA size batteries and have two
emitters. Tests with various manufacturers’ remote
controls have shown that the operating range
can vary from a minimum of 20’ to a maximum
of about 35’.
Infrared signals travel essentially line-of-sight.
They will not pass through or around solid objects.
Do not rely on an IR signal being able to “bounce”
off a wall or object to the MS120.
The IR pickup angle of the MS120 is 30° off-axis
(horizontal and vertical) at 25’.
Avoiding Electrical Interference
Avoid locating the MS120 near any potential
sources of electrical or optical noise, such as light
dimmers, low-voltage lights, and neon lights.
Do not install the MS120 into electrical boxes
with 110 volt devices
Some states or municipalities allow devices
such as the MS120 to be installed into the same
electrical box as 110 volt devices, provided a “low-
voltage partition” is used between the devices.
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12V DC Power Supply
(Supplied with the
MSU250 Main System
Unit) Plugged into an
Unswitched AC Outlet
Powers the System
Niles IR Flasher
Stereo Receiver
12V DC Power supply
(Not Supplied) plugged
into a switched outlet
(Niles stock# FG01035)
MS120 IR Sensor
Power, IR data, status signal and ground
via CAT-5 wire
MSU250
Figure 3. Wiring Diagram (Typical installation with an MSU250 Main System Unit)
Figure 4. This color code is based on the industry standard T568A coding for the RJ45 connector. Suggested wiring of
MS120 to Niles MultiZone Keypad that an have IR-Sensor connection
Figure 1.
a Hex Nut (supplied)
b Washer (supplied)
c Mounting Surface
d IR Cable (10 feet supplied)
e MS120 Miniature IR Sensor (supplied)
f MS120 Lens Bezel (supplied)
Figure 2. Wiring legend
FEATURES & BENEFITS
The MS120 offers a number of improvements over
other miniature IR sensors.
• WidebandHigh-FidelityDesignenables
operation with virtually any brand of equipment
• PatentPendingUniversalNoiseSuppression
Designenablesoperationinvirtuallyany
environment:nearplasmaandLCDdisplays,
compact fluorescent lights, and indirect sunlight
• ExcellentIRreceivingrange—20’to35’of
remote control range (depending upon the
strength of your handheld remote)
• Smallsizeofonly1/2”diameterby2-7/8”
long—fitsalmostanywhere
• 10’connectingcableincluded
• Printedcircuitboarddesignusessurfacemount
technology, assuring high reliability
• Idealforbothhomeandcommercialinstallations
• Twoyearpartsandlaborlimitedwarranty
INTRODUCTION
The MS120 is a flush-mount IR sensor designed for
use with the Niles infrared extender systems.
Installed in a remote room location, the MS120
receives the IR commands transmitted from your
existing hand-held remotes in that room. The
commands are carried via a CAT-5 cable to your
A/V equipment in another room, and instantly
“repeated”.
The MS120 is compatible with all current Niles
infrared systems. It may be used along with, or as
an alternative to, the Niles TS120, WS120, MS120,
MS220 and CS120 sensors or the IntelliPad
®
.
The MS120 is just one part of the three building
blocks necessary to complete a Niles IR repeating
system:
•IRMainSystemUnit—ModelsMSU140,
MSU250,MSU480andMSU440Z.
•IRSensors/Keypads—ModelsWS120,TS120,
MS120,MS220,CS120,andtheIntelliPad.
•IRFlashers—ModelsMF1,MF1VF,MF2,MF2VF
and the IRB1.
An IR sensor expansion hub, Model IRH610, is
available to provide additional sensor inputs to your
system.
IMPORTANT:Referinstallationtoaprofessional
custom installer if you are unfamiliar with any of
the following procedures.
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