Specifications

Operation Details (Continued)
Station specific amplifiers provide flexibility.
Each station is coupled directly to its own amplifier that
can access any one of eight internal communication paths.
The flexibility of this design allows multiple pages, time
tones and intercom or telephone conversations
simultaneously. Incoming sensitivity and outgoing gain of
the intercom amplifiers are adjustable to compensate for
varying field conditions. This design also incorporates
Automatic Gain Control (AGC) as well as short circuit
protection that increases system reliability and assures
sufficient power for All-Call operations. The system is
designed to use 45-ohm speakers, 25-Volt speakers, or
combinations of both.
Intercom Emergency Calls. Emergency calls can be
placed via Call Button and begin a unique ringing
sequence at the appropriate Administrative Phone. In the
event that the call goes unanswered, the system can be
programmed to automatically announce, via a synthesized
voice, the origin of the call (room number) over a group
of speakers or all speakers within the facility assuring a
response from a nearby location. Reset occurs when an
Administrative Phone answers the call.
Microphone Input. The CPU board has provisions for a
directly connected microphone (150-ohm input) for
normal All-Call announcements, bus loading, and
emergency override paging.
Emergency Functions. Function keys on the
Administrative Phones may be programmed for single
touch emergency functions. Function key #1 can be
programmed to cause a warble tone to be transmitted
throughout the facility to warn of a tornado alert. A
second function key can be used for a manual class
change using a 700 Hz tone. The chime tone could be
programmed on function key #3 for an All Clear signal.
Other typical uses are program distribution or manual
activation of night mode.
Multiple Tone Selection. The 5120 system is equipped
with nine different tones for specific user configurations.
Each tone may be field specified for each system
function. Tone selection includes:
 600 Hz, 650 Hz, 700 Hz, and 1250 Hz
 Hi-Low (700 Hz - 400 Hz), or Warble
 Single Chime High (1250 Hz) or
Single Chime Low (700 Hz)
 Dual Chime (1250 Hz/700 Hz)
Privacy and Pre-Announce Tones. Privacy tones are
generated at the called intercom location to advise the
remote location they are being monitored. Pre-announce
tones are generated at the beginning of the intercom and
paging functions to advise of upcoming message
transmissions.
Security Monitoring. Each station call-in circuit may
be connected to auxiliary security break glass detectors or
motion detectors during times when the building is
unoccupied. The transfer from conventional intercom
operation to security monitoring is accomplished through
the system’s internal clock and is programmed locally.
One of the eight auxiliary relays would be used to
interface with a premise security panel.
Programmable Inputs. Six (6) multi-purpose
programmable inputs are provided to allow switch
closures or relay outputs from other equipment to activate
functions within the system.
Auxiliary Relay Operation. 5120 systems are
equipped with eight auxiliary relays. These relays can be
programmed to respond to various happenings within the
system such as the security functions described above. An
unanswered emergency call can activate a relay that in
turn operates a telephone dialer to request assistance.
Relays may also be used for door control in conjunction
with an intercom station.
Please Note: 5120 system auxiliary relays cannot be
programmed to ring 120 VAC bells directly, use auxiliary
relays for 120 VAC control.
Clock Control. System relays can be used to control
clocks requiring standard sync-wired 12-hour correction
as well as 24 VDC Digital Clocks requiring 12-hour
correction, without the need of an additional Master
Clock module. The addition of slave relays with contact
ratings suited for the clocks being corrected is required.
5130-9165 Master Clock Option. In the event that
non-audio devices (like electro-mechanical bells) are
included on time tone schedules, the 5130-9165 master
clock option is used. See the description of the master
clock assembly under Optional Equipment.
Zone Paging. Any of the system’s 360 speaker circuits
may be assigned to any or all of the system’s 72 paging
zone groups. Zone paging is easily accomplished by
entering a three-digit code on a system telephone that has
the proper priority level. Two different priority paging
levels are available to ensure critical pages are heard in
the proper areas.
Internal Clock. The internal system clock can be
programmed to automatically adjust for seasonal time
changes as well as scheduled class changes. The user is
prompted to input the days of daylight savings and the
clock is automatically adjusted on the days selected.
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4 S5120-0012-17 3/2010