Louroe Electronics DG-12II - Manual (Page 30)

PAGE 27 of 28
GLOSSARY OF TERMS (cont.):
Plug-in Connector The connector supplied where all the cables coming from remote
station units (microphones and speakers) are connected before they
are plugged into the vertical header (socket) at the rear panel of the
base station (DG-25
III ).
PTA (Portable Test Amplifier) A portable audio amplifier for testing microphone audio output
during field Installation.
Remote Station A device or unit (typically a Louroe speaker/microphone) located
and installed in a remote area or in a surveillance zone for purpose
of monitoring audio or generating an alarm to the Louroe base
station.
Relay An electromechanical switch in which a change of current or voltage
in one circuit can be made to produce change in the electrical
conditions of another circuit.
Relay COM Contact Common contact of a relay. This contact transfers from the NC
(normally closed) contact to NO (normally open) contact when the
relay is energized, and reverse when de-energized.
Relay NC Contact Normally closed contact of a relay. This contact opens whenever
the relay coil is energized.
Shielded Cable An insulated wire that has been shielded by a copper braid or tape.
An aluminum foil or a semi-conductive vinyl.
Speaker A term to refer to a loudspeaker located in the remote station. This
unit can be used by itself for talkback-only operation, or in
combination with microphone for two-way communication.
Talkback A term used for addressing a speaker in a remote station or a zone,
or addressing all the speakers simultaneously during ALL CALL
talkback operations.
Threshold An audio level limit, when exceeded, it will cause the base station to
go into alarm.
Zone An area of coverage where the remote stations are installed for
audio surveillance. A large area can be divided into several zones
to maximize the surveillance coverage. Six microphones or four
speaker/microphones can be used per zone. It is also an area
designation for ease of identifying the alarmed location. (Example: A
stairwell or elevator lobby).
DG_12II_6/11
LOUROE ELECTRONICS 6 9 5 5 VA L J E A N AVENUE, VAN NUYS, CA 91406 TEL (818) 994-6498 FAX 994-6458
website: www.louroe.com e-mail: [email protected]
(818) ®
INSTALLATION AND OPERATING INSTRUCTIONS