Connecting The Battery Back Up Assembly
The common equipment provides an interface connector for the connection of an optional
external battery assembly.
CAUTION
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 external battery assembly provides a minimum of one hour of operation should the AC
power to the system be interrupted. The assembly has a 15 ampere-hour current rating and is
fused with the following value: 4A 250V 3AG type.
The external battery assembly may include batteries from either of the following suppliers:
•
Model PS-12150 from Power-Sonic Corporation, Redwood City CA, 94032
•
Model PE12V15 from GS PORTALAC, City Of Industry CA, 91748
The minimum battery backup time for a fully configured system can be calculated using the
formula:
Back Up Time (in hours) =
K(15)
1 + [(0.1) (N)]
K (Constant) =
0.9 for J0408 with or without an expansion module
0.8 for J0816 with or without expansion modules
0.8 for J1632 with or without expansion modules
15 = ampere-hours
N = total number of stations
Example:
Assume that a J1632 system plus two JM408 modules are installed along with the optional
battery assembly to provide back-up power.
Back up time =
(0.8) (15)
=
12
= 2.1 Hours
1+[(0.1) (48)]
5.8
IMI66–132
DSU II Digital Telephone System
2 – 62 Installing The DSU II Digital Telephone System
Содержание DSU II
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