Operating instructions

General Description
The best description of the operation of the MS-200 is contained within the descriptions of the operation of the controls and
connections shown on pages 2 and 3. In general . . . . .
The MS-200 withits external power supply is intended to be the central control point for two separate circuits of outstations.
Outstations can be portable headset stations (usually referred to as belt packs), fixed headset stations, loudspeaker stations, remote
stage manager stations, or additional MS-200’s (less their power supplies).
Outstations should be organized into two logical groups which will each then become a party-line circuit. The two (A &
B)groups of 3 rear panel male XLR-type connectors are used to connect the outstations to the MS-200 using 2-conductor shielded mi
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crophone cable fitted with 3-pin XLR-type connectors. As many as three runs (on each circuit) may be started at the MS-200, but out
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stations usually have
In and Out connectors allowing outstations to be daisy-chained together. An accessory SB-1 splitter box (see
page 4) may be used to combine sub-groups of stations with either circuit. The stations on each circuit will be in constant communica
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tion with each other regardless of settings at the MS-200 (as long as power is supplied).
The MS-200 may communicate with both groups (circuits) of remote stations separately or simultaneously, without tying
the two together. Pressing either or both
Circ buttons connects the MS-200. These buttons turn green when the connection is made.
The operator may monitor either or both circuits while his/her microphone is either
On or Off. Each circuit has its own signal
lamp/button which, when pressed, lights all the other signal lamps on that circuit. The lamp will also light wheneveranyoutstation on
the circuit presses their signal button.
The MS-200 provides XLR inputs (see page 3) and level controls (see page 2) for audio signals originating at a mixer (line
level) or directly from a microphone (mic. level) This program will then be heard on the MS-200’s speaker or headset, and, by switch-
ing the front panel selectors, to either or both circuits. Level at the MS-200 is regulated by the front panel controls. Level at the outsta-
tions is controlled by the outstation’s level control.
The MS-200 may be used with an optional gooseneck microphone (LSM-1, 2 or 3), in combination with its built-in loud
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speaker, or with a headset or handset. When used with a gooseneck microphone the sidetone control should be adjusted to minimize
feedback.Innoisy situations the LSM-2 noise canceling microphone should be used. The output of the microphone (headset or goose
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neck) may be momentarily redirected to a remote paging amplifier by shifting the front panel switch to its
Page position.
Connections and Cable
Remote stations are connected to the MS-200 using 2-conductor shielded microphone cable fittedwith 3-pin XLR-type con
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nectors. Cable type and size are determined by the total length of all runs, butin general we recommend that the individual conductors
be no smaller than 22 AWG. For longer runs and for permanent installations in conduit, please request the Applications Note ‘Cable
Type and Size’ from Technical Projects. Pin configurations are shown below.
MS-200
2-Circuit
Master Station
Operating Instructions
The paging output is a combination 3-circuit (tip/ring/sleeve) 1/4"phone jack and a 3-pin XLR-type female XLR. The pag
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ing output appears as a balanced 600
W signal across the tip and ring of the 1/4"and pins 2 and 3 of the XLR. The sleeve of the 1/4’and
pin 1 of the XLR are connected to chassis ground. The normally open contacts are across the tip and ring of the 3.5mm stereo jack,
with no connection to the grounded sleeve.
Production Intercom Inc.
P.O. Box 3247, Barrington, IL 60011-3247
Voice: [phone] Fax: [phone] Sales/Technical Assistance (
US & CAN): [phone]
e-mail: [e-mail] Web: beltpack.com
Printed in USA
Rev. 03/99