TECHNICAL DATA PACKAGE
Model 862System Interconnect
SECTION
1:
INTRODUCTION
The Model 862 System Interconnect interfaces with
the Model 802 Master Stations and other external
systems, and equipment. Typically, Model802Master
Stations access communications circuits which
include: conference-line and central matrix type
intercom systems, paging systems, telephonelines and
two-wayradios. (seedrawingAS3062).
The Model 862 System Interconnect enables the
connection of up to twelve Model 802 type intercom
channels; and up to twelve standard 'TW" intercom
system channels. The Model
802
Master Stations
plug into the Model 862 System Interconnect at 51
-
J4 inclusive. The Model 862 converts the twelve
Master Station type channels (two-wire, balanced,
dry) to twelve
"TW"
type channels (two-wire,
unbalanced, 'wet
=
with dc) by using transformerand
capacitive coupling. The
"TW"
circuits are accessed
on rear panel mounted Cpin XLR type connectors:
55 (channels
1,
2, 3)
,
56 (channels 4,
5,
6)
,
57
(channels7, 8,9) and 58 (channels 10,
11,
12). These
circuits are directly plug-in compatiblewith standard
"TW"
intercom lines. The
"TW"
System power supply
(ies) terminate the Master Stationtype channels. If a
Master Station type channel does not interface to a
"TW"system power supply, a proper termination must
be added. This termination consists of a
200
ohm
resistor and a 10 microfarad capacitor connected in
series. The resistor-capacitor combination is
connected on the unbalanced connector from the
channel pin (to be terminated) to the common pin.
Associated with each Master Station channel is a
"keying"logic type signalwhich operates a relay in the
Model 862 System Interconnect. There are twelve
such logic signals and they are originated by pressing
a Model 802 'Talk" button. Each of the twelve relays
has a set of single pole double throw contacts
available on one of two rear panel mounted 25-pin
"Dn
type connectors (521, 522). The relay contacts
may be used for control, signalling,or audio switching
functions.
The relaysfor channels7 though 12have an
additionalset of audiocontactswhich are accessed on
six femaleXLR-3type input connectors(J9
-
514
inclusive). These circuits are line-level transformer-
balanced and can be used for simple Studio
Announce, Slate Microphone, IFB (Interrupted
FeedBack or program interrupt), and/or similar
functions. (These functions will be common to all
Model 802 Master Stations in the system when they
are equipped with the "TalkOption"). A transformer
balanced, program input (523, AUX PGM IN #2) on
the Model 862 accepts a line level audio signal. This
common program monitoring signal is disrupted to
the "Auxiliary Program Input #2" on all the Model
802
Master Station in the system.
AdditionalDetails
If more than four Model 802 Master Stations LINE
CONNECTORS are to be connected to the Model
862System Interconnect,use (a) Model 4025A
1
x
4
Splitter Assembly (s) to parallel the add@onal
incoming cables from the Models 802's. The Model
4025A may be plugged into either the Model 862 or
another Model 4025A. Each Model
802
LINE
CONNECTOR contains
12
balanced audio pairs for
channels
1
through 12. 12keying limes, 12keying line
returns and
1
audio program pair (AUX PGM IN
#2).
Functional Details
of
SA/IFB Feature
Normally, in a non-keyed condition, the relays
connect the input female XLR-3 connectors to the
output male XLR-3 connectors. When a talk circuit
key of a given channel is activated, the relay
disconnects the input female XLR-3 connector and
connects the output male connector to that channel's
talk audio from the Mode1
802.
For example, a single
IF3 channel fed audio from channel
7,
also, fed
program audio into 59 should connect a power
amplifier with speaker to J15. When the channel
7
talk button on any Model 802 is pressed, the program
signal is interrupted and audio from that Model 802
will be fed to the power amplifier. When the talk
button is released, the original program signal is
restored.
RTS Systems,Burbank,
CA
91506
/
FSCM:
60572 TDP3511/ SecondEdition, October 1989
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