Specifications

Installation
Connecting The Power And System Grounding
IMI 66-097
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.
A plug-in power line surge protector should be
installed between the power cord and the AC outlet.
Do not connect the AC power cord until the
installation has been checked.
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 kii.
Be sure that the AC power cord Is
connected to the electrlcal outlet before
connecting the external battery assembly
to the common equlpment Interface
connector. This ensures that Internal
protectlon clrcuttry Is operatlng to prevent
damage that could result from improper
connectlon.
When charged to full potential, the optional Comdial
model BBUOl external battery assembly provides a
minimum of one hour of operation should the AC
power to the system be interrupted. No calls will be
dropped when an AC power failure causes the
system to automatically switch over to BBUOI
operation
The BBUOl external battery assembly may include
batteries from either of the following suppliers:
- Model PS-1265 from Power-Sonic Corporation,
Redwood City CA, 94032.
- Model EP1265-26 from Elpower Corporation,
Santa Anna, CA 92704
During AC operation, the common equipment
provides recharging current to maintain the voltage
potential of the external battery assembly at an
operational level.
NOTE: The optional external battery assembly
requires approximately 24 hours to completely
re-charge to full potential after it has been
completely discharged and, in some cases,
when initially installed. The charging circuit
may not provide an adequate charge if an
installed battery assembly has a current rating
of greater than 15 ampere-hours-
The BBUOl ex-ternat battery assembly has a 6.5
ampere-hour current rating and provides an absolute
minimum of one hour of operation should the AC
power to a system be interrupted. Calculate the actual
minimum battery back-up time for any configured
system using the following formula:
T= (Kj le1
1 + I(O.1) (WI
T = Back-up time in hours
K = 0.9
e = Ampere-hour capacity of battery (BBUOl = 6.5)
N = total number of stations
Examples:
N0820-IST, K0820-IST
T=m q +=!.%t-iOUrS
1 4 [(O.l) (20)] .
N1024-IST, K1024-IST
(0 9ll6.51
T = 1 4 iiO.1) (24)]
=a
= 1.72 Wours
3.4
System Grounding
The common equipment cabinet has internal
secondary surge protection on all line ports. In order
for this protection to be effective, you MUST connect
the cabinet 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.
The common equipment cabinet provides a ground
stud for this purpose.