GAI-Tronics SSM110 Card Rack Assembly - Manual (Page 4)

Pub. 42004-669L2E
SSM110 Card Rack Assembly Installation, Operation, Maintenance Manual Page: 2 of 26
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System Design Considerations
Carefully plan the system layout before installation. Install handset stations in locations that allow for
convenience, accessibility, and personnel safety. For comprehensive speaker sound coverage, consider
the quantity and location of the loudspeakers—particularly in areas of high ambient noise or
reverberation.
Also, carefully plan the layout to minimize the amount of cable required for each installation. This is
especially important because all SmartSeries stations are wired in a branch configuration. GAI-Tronics
can supply multi-conductor cable designed specifically for this system. GAI-Tronics standard cable has
600 V insulation and is Underwriters Laboratory (UL) rated for power cable tray use.
If you need assistance in speaker layout, refer to GAI-Tronics Speaker/Horn Installation Manual
(Pub. 42004-135) for layout and speaker placement information.
Capacities/Limitations
SmartSeries Stations—A maximum of 200 SmartSeries stations may be connected to the PPI card in the
SSM110 Card Rack.
Access Panels—A maximum of eight access panels may be connected to the API card of the SSM110
Card Rack.
Speakers—Only one speaker can be connected to a SmartSeries station if the station is supervising the
speaker. If speaker supervision is not being used, up to four speakers can be connected to a single station
in low noise areas. We recommend a maximum of two speakers be connected to a single station in high
noise areas.
Access Panel Cable—The recommended maximum cable distance from the card rack to an access panel
is 6,560 feet (2000 meters).
GAI-Tronics System Cable—The recommended maximum cable distance from the card rack to a
SmartSeries station is 5,250 feet (1600 meters).
GAI-Tronics Speaker Cable—The recommended maximum cable distance from a SmartSeries station
to an 8-ohm speaker is 75 feet (22.86 meters). The maximum cable distance from a SmartSeries station to
a 16-ohm speaker is 150 feet (45.72 meters).
Station and Access Panel Power
SmartSeries stations require 120 V ac power. GAI-Tronics system cable contains a No. 14 AWG wire
triplet for distributing ac power to the SmartSeries stations. This wire can carry a maximum of 15 amps.
Each station requires approximately 0.5 amps maximum; therefore, up to 30 SmartSeries stations can be
connected to a single power circuit. Additional stations must be powered by additional power circuits.
Access panels are supplied with a modular ac power cord. Plug one end of the cord into the mating
receptacle on the rear of the access panel the other end into a standard 15A power receptacle.