Specifications

Installation IMl66-107
AC Power Connection
Employ a dedicated 117VAC 15 AMP circuit, with a
third-wire ground, supplied to a standard electrical
outlet (NEMA 5-15R) for the AC power connection.
AC power connection is illustrated in Figure 3-2
shown below.
0 For added equipment protection, connect a plug-in
power line surge protector between the power cord
and the AC outlet.
0 Thoroughly check out the installation before
connecting the power cord to an electrical outlet to
apply AC power to the system.
Battery Back-Up
The common equipment provides an interface
connector for the connection an optional external
battery assembly. Several different assemblies are
available separately as kiis (product codes BBU02,
BBL02, and-BBL03). ..
Be sure that the AC power cord is
connected to the electrical outlet before
connecting an external battery assembly to
the common equipment interface
connector. This ensures that internal
protection circuitry is operating to prevent
damage that could result from improper
connection.
The optional external battery assembly provides a
minimum of one hour of operation should the AC
power to the system be interrupted. The BBU02 and
BBL02 assemblies have a 15 ampere-hour current
rating and the BBLOB assembly has a 25 ampere-hour
current rating.
The BBU02 and BBL02 external battery assemblies
may include batteries from either of the following
suppliers:
- Model PS-12150 from Power-Sonic Corporation,
Redwood City CA, 94032
- Model PE12V15 from GS PORTAIAC,
City Of Industry CA, 91748
The BBL03 external battery assembly may include
batteries from the following supplier:
- Dynasty JC12-250 from Johnson Controls Inc.,
Milwaukee WS, 53212
As discussed previously in the page 3-1 paragraph
titled Special Mounting Consideration, you must mount
the BBU02 assembly, the common equipment cabinet,
and all the wiring in a “dedicated equipment room”.
The BBL02 and BBL03 assemblies consist of a closed
metal cabinet, a pair of batteries, panel-mounted
fuses, and a cable that connects the battery back-up
unit to the telephone system. This cable is secured to
the cabinet by a strain-relief. This model is safe for
installation in general off ice environments and does
not need to be installed in a “dedicated equipment
room.”
The minimum battery backup time for a fully
configured system can be calculated. The formula for
doing this is:
T = 1 + [(O? (N)]
T = Back-up time in hours
K = Constant
0.9 for GO408 with or without a GM408 module
0.8 for GO81 6 with or without GM408 modules
0.8 for G1632 with or without GM408 modules
e = Ampere-hour capacity of battery (BBU02 = 15)
N = total number of stations
Example:
Assume that a Cl832 system plus two CM408
modules are installed along with a BBU02 battery
assembly to provide back-up power.
(8.8) (I 5)
T = 1 + [(O.l) (48)]
12
= 5.8
= 2.1 Hours
0 During AC operation, the common equipment
provides recharging current to maintain the voltage
potential of the external battery assembly at an
operational level. The charging circuit may not
provide an adequate charge if an installed battery
assembly has a current rating of greater than 40
ampere-hours.
NOTE: An optional external battery assembly requires
approximately 10 hours to completely
re-charge to full potential after it has been
,
completely discharged and, in some cases,
when initially installed.
System Grounding
The common equipment cabinet has internal
secondary surge protection on all line ports. In order
for this protection to be effective, the cabinet MUST be
connected to a reliable earth ground such as a metal
cold water pipe or a building frame ground. The
grounding wire must be of #lO or #12 insulated, solid
copper and separate from the three-wire AC line cord.
A ground stud is located on the common equipment
cabinet for this purpose. System grounding is,
illustrated in Figure 3-2,
If spare conductors exist in the cables that are run
between the station and the 86M-xx connector blocks,
it is good practice to connect them to earth ground.
Doing this may help prevent them from inducing radio
frequency and/or AC interference into the system. It is
also good practice to disconnect any unused station
jacks from the connector block and ground that wiring
to earth ground as well.
3-4