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IMI 66-083
Instal’.
AC POWER CONNECTION
Employ a dedicated 117VAC 15 AMP circuit, with a
third-wire ground, supplied to a standard electrical
outlet (NEMA
515R)
for the AC power connection. A
C
power connection is illustrated in
Figure 3-2
shown
below.
l
A plug-in power line surge protector should be
installed between the power cord and the AC outlet.
l
Do not connect the AC power cord until the
installation has been checked.
l
To apply AC power, connect the power cord to the
electrical outlet.
BATTERY BACK-UP
The common equipment provides an interface
connector for the connection of an optional external
battery assembly. This assembly is available
separately as a kit.
Be sure that the AC power cord Is
connected to the electrical outlet before
connecting the 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.
l
The optional Comdial model BBU02 external battery
assembly provides a minimum of one hour of
operation should the AC power to the system be
interrupted. The BBU02 assembly has a 15
ampere-hour current rating.
The BBU02 external battery assembly may include
batteries from either of the following suppliers:
-
Model PS-12150 from Power-Sonic Corporation,
Redwood City CA, 94032.
-
Model
PEl2V15
from
GS PORTALAC, City Of
Industry CA, 91748
The minimum battery backup time for a fully
configured system can be calculated. The formula for
doing this is:
T
= 1 +
[(0:
(N)]
T
=
Back-up time in hours
K
= Constant
0.9 for CO408 with or without a CM408 module
0.8 for CO816 with or without CM408 modules
0.8 for Cl 632 with or without CM408 modules
e
= Ampere-hour capacity of battery (BBU02 = 15)
N
= total number of stations
Example:
Assume that a Cl 632 system plus two CM408
modules are installed along with a BBU02 battery
assembly to provide back-up power.
(0.8) (15) 12
T
= 1 +
[(O.l)
(48)]
= 5.8
=
2’1
Ho”rs
l
During AC operation, the common equipment
provides re-charging 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:
The optional BBUO2 external battery assembly
requires approximarely
70
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,
3-3