Samsung iDCS 500 User's Guide Page 106

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iDCS 500 INSTALLATION
TECHNICAL MANUAL PART 7 NOVEMBER 2001
7.3
Use one pair twisted #24 AWG or #26 AWG jumper wire to cross-connect SLI circuits
to the VM/AA system (see Figure 7–7). For more information on programming these
ports, see the Programming Section, MMCs 207, 601 and 726
. See also the Standard
Telephone User Guide for feature codes and instructions.
7.8 CONNECTING SYSTEM BACKUP BATTERIES TO
THE iDCS 500 POWER SUPPLY
The iDCS 500 power supplies (PSU-B and PSU60) contain a monitoring circuit to
switch the system to customer provided 48VDC batteries when AC power is
interrupted. Calls in progress are not disconnected. The power supply circuitry
monitors and recharges batteries as needed.
Connect four 12V batteries or eight 6V batteries in series. Any NICAD or lead acid (car
or motorcycle type) battery can be used if its rating is not less than 6AH (amp hours)
but no more than 40AH per power supply. The batteries must be located within three
feet of the KSU. Use the factory-supplied wire harness with 36” white and black leads
to connect batteries (see Figure 7-8).
Observe the following precautions when installing batteries:
a. Make sure the batteries you install conform to local building, fire and safety codes.
Some battery types emit hydrogen gas during the charging state and may require
venting to fresh air.
b. Do not place batteries directly on a concrete floor. This causes them to discharge
very quickly.
c. Follow the battery manufacturer’s recommended installation and maintenance
procedures.
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