GAI-Tronics 7245-004 SmartSeries Indoor Remote Subset Amplifier Enclosure - Manual (Page 5)

Pub. 42004-644L2D
7245-004 Indoor Remote Subset Amplifier Enclosure Page 5 of 12
f:\standard ioms - current release\42004 instr. manuals\42004-644l2d.doc
07/12
Installation
WARNING
Do not install this equipment in hazardous areas. Installations in non-
approved hazardous areas may cause a safety hazard and consequent injury or property damage.
General Information
Refer to the system layout diagrams for typical single party and multi-party system diagrams. These
diagrams and the instructions that follow will assist you in installing the 7245-004 Enclosure. For
additional system installation, operation, and maintenance information consult Pub. 42004-139,
Installation of GTC 700 Series Page/Party
® Systems Manual.
When installing an add-on station, consult the system layout diagrams at the end of this manual. These
figures, when used in conjunction with the station installation information and cable layout guide, should
provide all the information necessary to install additional stations.
System layout and power cable length are very important when installing SmartSeries and Page/Party ®
equipment. Although it varies for different systems, the general guideline is that the most distant station
should not exceed 1 mile [5280 feet (1600 m)] from the line balance assembly in Page/Party
® systems, or
the Page/Party ® Interface in SmartSeries systems.
SmartSeries stations require 120 V ac power. The typical ac input current for Page/Party ® and
SmartSeries stations is less than 0.5 A
RMS
at full power output. GAI-Tronics system cable contains a No.
14 AWG wire triplet for distributing ac power to the stations. This wire can carry a maximum of
15 amps. Therefore, up to 30 SmartSeries stations can be connected to a single power circuit. Additional
stations must be powered by additional power circuits. Refer to the table below for power calculations.
Voltage drop must also be taken into consideration for long cable runs. The minimum operating voltage
for a GAI-Tronics station is 90 V ac and the resistance of No. 14 AWG cable is 26.8 ohms per loop mile.
Contact your nearest GAI-Tronics representative if you require assistance with system layout.
Table 1.
Page/Party ® Zone Power Calculation Table
The maximum power in any leg of a zone is limited to 120 V ac at 15 amps due to the wire size
(No. 14 AWG) in the system cable. Therefore, the following calculations must be made when
determining the maximum number and type of units in a leg of the zone.
Number of handset stations, speaker amplifiers,
or SmartSeries Remote Terminal Units:
_______  0.50 amp = ________
Total current (<15 amps): _______