GAI-Tronics IPE2500A, IPE2500A-MLS Paging Encoder / Desktop Controller User and Installatoin Manual - Manual (Page 44)

Installation IPE2500A and IPE2500A-MLS Paging Encoder/Desktop Controller
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Electrostatic Discharge (ESD) Protection
The IPE2500A have ESD protection circuitry that provides a high degree of protection against ESD, and
power and telephone line surges. The circuitry shunts the transient currents to earth ground through the
ground terminal. One of the two screws located on the back of the desk set can be used as an earth
ground terminal. See the rear view of the desk set for the ground screw terminal locations.
The ground terminal must be connected to a high quality earth ground point to obtain maximum
protection. Ideally, the ground point should originate at a 1/2-inch copper rod driven at least six feet into
the soil with a No. 16 AWG (or larger) copper wire run to the ground terminal taking the shortest path
possible. Where this is not possible, ground to a nearby water pipe or best available ground.
Equipment Required
Test Equipment:
 RF service monitor, or:
 an ac millivolt meter or SinAd meter to measure audio levels
 #1 Phillips screwdriver
Documentation:
 remote adapter information, if applicable
 these installation instructions
Cable Installation Safety Considerations
Wiring should conform to the Article 800 of the National Electrical Code. Use listed communication
wiring and cabling for interconnection to other equipment that is suitable for the purpose. Cables should
be marked as
CM
,
CMP
,
CMR
, or
CMX
as appropriate for the use.
Interconnecting data cables should be separated from electrical light or other Class 1 power cables by at
least 2 inches. The exception is where Class 1 wiring or power circuits are run in a raceway or in metal-
sheathed, metal-clad, or permanently separately from the conductors of the other circuitry by a
continuous and firmly fixed nonconductor, such as porcelain tubes or flexible tubing in addition to the
insulation on the wire. Interconnecting cables longer than 2 meters should be rated VW-1 or FT-1 or
greater.
Telephone Line Lightning and Over-Voltage Protection
The IPE2500A has an over-current phone line fuse which protects against occasional extreme fault
conditions that may get past the primary protectors. An example of such a fault condition is a power line
cross. If the fuse requires replacement, use only with the same type fuse.
For maximum surge and lightning protection, building primary (over-voltage) protectors should be
installed at the point where the telephone lines enter the radio equipment building. Primary protectors
are usually required by local codes and should be provided by your leased line provider.
Power Connection
Connect the IPE2500A to the listed ac wall transformer, which supplies nominal 12 V dc. Optionally,
the desk set can be powered by other dc sources. The operating range is 10.5 to 16 V dc. Refer to the
power connection pinout on page 6 of the “Connectors” section of this manual.