Studio Technologies 220 2008 - Manual (Page 10)

Issue 4, October 2008 Model 220 User Guide
Page 10 Studio Technologies, Inc.
configuration controls a security panel,
included with each unit, is attached to
the bottom of the enclosure.
Connectors
The Model 220 uses standard connectors
throughout. The microphone, IFB, and line
inputs use 3-pin female XLR-type connec-
tors. The main and talkback outputs use
3-pin male XLRs. The headphone output
utilizes a ¼-inch 3-conductor jack. The ex-
ternal source of 24 volt DC power is con-
nected by way of a 2.1 x 5.5 mm “locking”
coaxial power jack.
Additional Connector Locations
In the world of broadcast and produc-
tion audio it’s fair to say that applications
vary widely. To this end, up to three addi-
tional XLR-type connectors can be easily
mounted into the Model 220’s back panel.
Multiple 3-position “headers” located on
the Model 220’s circuit board provide
technician-access to literally every input
and output connection. Using a factory-
available interface cable kit, these allow
a Model 220 to be optimized to meet the
exact needs of specific applications. For
example, some applications may prefer
to use a multi-pin XLR-type connector to
interface with a headset. This could be
easily accomplished by adding the appro-
priate 5-, 6-, or 7-pin XLR-type connector
and making a few simple connections.
Other applications may benefit from hav-
ing “mult” or “loop-through” connections,
something easily incorporated into a
Model 220.
Multi-Pin Headset Connectors
As previously mentioned, some broadcast
applications use headsets that interface
using a multi-pin connector. In most cases
these connectors are 6- or 7-pin male
XLR-type wired to an industry-standard
pin out scheme. Studio Technologies
offers headset connector assemblies that
allow fast and painless installation into
a spare connector location in the Model
220’s back panel. Details about these
optional assemblies are available on the
Studio Technologies website.
Options
The Model 220’s standard resources are
more than sufficient to directly support a
large number of applications. But in the
“real world” of audio and intercommunica-
tions special needs always seem to arise.
To that end, Studio Technologies offers
a number of option cards. In addition to
passive or active components, each card
contains an integral connector, allowing
simple installation into a spare connector
location on the Model 220’s back panel.
For interest, the resources provided by
some of these option cards are worth
describing.
• The direct microphone output card
provides access to the dynamic or con-
denser microphone that is connected
to the Model 220’s mic input. Passive
components, along with the auxiliary
relay contact, create a “click-free”
microphone-level audio signal.
• The remote switch input card uses a
4-pin XLR connector to provide access
to the Model 220’s remote switch inputs.
• The tally/remote switch input card pro-
vides a current-limited DC voltage that
serves as a main output status signal.
It also provides a remote switch input
connection.
Other general purpose option cards
provide 3-pin XLR, 4-pin XLR, and 8-pin
EtherCon® connectors. With the range of
option cards available it’s hard to imag-
ine an application that can’t be served.