The following general procedures
must be observed in relation to the
location and installation of System
One Home Communication
components:
•
Stations are not to be installed
“back to back” or in “line of
sight” of each other as this will
cause feed-back (squealing).
•
Where stations are to be fitted
externally, appropriate
measures to provide protection
from weather are to be taken.
•
Avoid running Intercom cable
in parallel to electrical wiring.
•
The Power supply is not to be
installed in a cavity wall or any
area (roof etc) where
temperatures are likely exceed
100°F.
•
Guidelines for maximum cable
lengths as set out in this
manual are to be observed to
avoid the possibility of
operating problems due to
excessive voltage drop.
•
The maximum number of
stations on a system including
Master, Room and Door
stations is generally limited to
20. It is important that the
power supply is properly
matched to the size
of the system. (See Power
Supply on pg 8)
CAUTION:
Failure to use
specified cable may cause
problems with the performance of
the system and will void warranty on
the equipment.
IMPORTANT:
Responsibility will not
be taken for problems that arise
from the improper use of cable or
interference generated externally
to the system.
Interference by light dimmers,
fluorescent lighting and similar
electrical products, must be
corrected at the source.
An aid to reducing the effects of this
type of interference is to place
stations and wiring no closer than
30cm (12”) from any AC device or
wiring.
The circuitry of the intercom has
been designed to minimize the
effects of Radio Frequency
Interference however total
immunity to this type of interference
cannot be guaranteed where the
levels of interference generated are
extreme.
GENERAL INFORMATION
POS - 15 VDC (RED)
May measure from 13.8V to 15.5 VDC with respect to 0V depending on voltage
drop due to cable length.
NEG - 0 VDC (BLACK)
TC - TIMER CONTROL (SHIELDED RED)
Holds receiving stations on line for period controlled by initiating station.
Normally low. Goes high when chime activated or call initiated from any station.
Stays high until chime or call is reset.
VLC - VOLTAGE LEVEL CONTROL (SHIELDED WHITE)
Carries different voltage levels generated by initiating station to allow targeting
of calls etc. Voltage is present for duration of button press or chime activation.
COMMUNICATION LINES - COM1 (WHITE) & COM2 (BLUE)
Carries balanced audio signal for Chimes, Private Calls & Paging Calls.
MUSIC/ MONITOR LINES - MUS1 (GREEN) & MUS2 (ORANGE)
Carries balanced audio signal for Music and Monitoring
.
AUX - AUXILIARY OUTPUT CONTROL (SINGLE CORE)
Carries different voltage levels generated at initiating station, to control specific
outputs on Auxiliary Output boards.
NOTE:
Shielded cable recommended for TC and VLC Lines to prevent
spikes caused by rising and falling control signals being induced
onto audio lines.
CABLE FUNCTIONS
