Samsung iDCS 500, Technical Manual

Page: 13 / 137

iDCS 500 Release 2 / OfficeServ INSTALLATION
TECHNICAL MANUAL PART 2 MARCH 2004
2.7
connecting a high current/voltage capacity ground wire which is bonded to ground at
the electric service power entrance or via some other method approved by the National
Electrical Code to the iDCS 500 system ground bar. This is a more secure ground
connection, which can only be disconnected intentionally. These precautions are taken
for safety reasons to protect personnel working on the iDCS 500 system and also for
operational reasons to accommodate ground return and/or ground-referenced analog
telephone circuits, which require this solid earth ground connection for normal
functioning.
2.8 POWER CONNECTIONS
AC POWER CORD ASSEMBLY
The AC Power Cord Assembly plugs into the AC power socket which is located on the
left side of the cabinet. The AC connection is a standard 16 AWG computer type power
cord
(see Figure 2–4) .
WARNING : DO NOT CONNECT AC POWER TO THE SYSTEM (see Section 4
Power Up Procedures).
iDCS 500 POWER SUPPLY UNIT (PSU60B)
The iDCS 500 PSU60B is the power supply for the iDCS 500 cabinet(s) (see Figure 2–
6) . A second PSU60B or a PSU60 is required if more than 56 stations are installed in a
cabinet. This same rule applies to each cabinet. Insert the first PSU in the first slot of
the cabinet. Before a PSU is installed, verify that the power switch is in the proper
voltage setting position, i.e. 110. If two or more PSU’s are to be installed use the same
procedure for each card.
WARNING : DO NOT CONNECT AC POWER TO THE SYSTEM (see Section 4
Power Up Procedures).
EXTERNAL – 48VDC BATTERY SOURCE
CAUTION : To reduce risk of fire and injury to persons, use only a sealed nickel
cadmium or lead-acid battery supply capable of handling a charge current of 0.45 A,
a charge voltage of –56 VDC and a discharge rate of 45 Ah.”
The iDCS 500 provides for connection of an external battery plant (i.e. to provide
–48VDC to power the system). The PSU60B/PSU60 provides -56VDC at 0.4 amperes
charging current (i.e. when AC power is present) which allows for float charging from
the iDCS 500 to emergency backup batteries. The iDCS 500 can also run without AC
power on a –48VDC battery system or rectifier. There should be no more than a -
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