ANSI Power and
Ground
For AC power feed, use
the power cable shipped with the CPT 50 shelf. For an AC power supply, the fuse
rating must not exceed 10 A or 15 A, depending on the standards in various
countries. The overcurrent and short circuit protection must be in accordance
with local and national electrical codes. The voltage rating value for AC power
ranges between 100 VAC to 240 VAC depending on the standards in various
countries. This product is intended for use on the TN and TT power systems.
The CPT 50 shelf for
48 VDC power supply has redundant –48 VDC #14 single-hole lug power terminals.
The terminals are labeled RET(A), RET(B), -48V(A), and -48V(B) on the power
module. See the figure below:
Figure 27. CPT 50 Shelf for
48 VDC Power Supply
The CPT 50 shelf for
24 VDC power supply has redundant –24 VDC #14 single-hole lug power terminals.
The terminals are labeled RET(A), RET(B), -24V(A), and -24V(B) on the power
module.
To install redundant
DC power feeds, use four power cables and one ground cable. For a single power
feed, only two power cables (#14 AWG or larger, copper conductor, 194 degrees
Fahrenheit [90 degrees Celsius] minimum) and one ground cable (#8 AWG or
larger) are required. Use a conductor with low impedance to ensure circuit
overcurrent protection. However, the conductor must have the capability to
safely conduct any faulty current that might be imposed.
For a 24 VDC power
supply, the fuse rating must not exceed 15 A. The voltages –20 VDC and –28.3
VDC are, respectively, the minimum and maximum voltages required to power the
chassis. The nominal steady state voltage is -24 VDC.
For a 48 VDC power
supply, the fuse rating must not exceed 10 A. The voltages –40.5 VDC and –57.6
VDC are, respectively, the minimum and maximum voltages required to power the
chassis. Functionality is guaranteed at -40 VDC input voltage, according to
GR-1089. The nominal steady state voltage is -48 VDC.
We recommend the
following wiring conventions, but customer conventions prevail:
-
Red wire for
battery connections (–48 VDC or -24 VDC).
-
Black wire for
battery return connections (RET).
-
The battery return
connection is treated as DC-I, as defined in Telcordia GR-1089-CORE.
The ground lug must be
a dual-hole type, UL Listed, CSA certified, and rated to accept the #8 AWG
cable. Two ground threaded holes with M4 screws are provided on the CPT 50
shelf to accommodate the dual-hole lug. See the figure below:
Figure 28. Ground Points on
the CPT 50 Shelf
ETSI Power and
Ground
The CPT 50 shelf for
ETSI has redundant –48 VDC power connectors (DSUB for DC power module) on the
DC power module. To install redundant power feeds, use the two power cables
shipped with the CPT 50 shelf and one ground cable. For a DC power supply, the
fuse rating must not exceed 10 A. The voltages –40.5 VDC and –57.6 VDC are,
respectively, the minimum and maximum voltages required to power the chassis.
The nominal steady state voltage is -48 VDC.
For AC power feed, use
the power cable shipped with the CPT 50 shelf. For an AC power supply, the fuse
rating must not exceed 10 A or 15 A, depending on the standards in various
countries. The overcurrent and short circuit protection must be in accordance
with local and national electrical codes. The voltage rating value for AC power
ranges between 100 VAC to 240 VAC depending on the standards in various
countries. This product is intended for use on the TN and TT power systems.
Caution |
Use only the power
cables shipped with the CPT 50 shelf. The part number of the cables is Cisco PN
72-4974-XX and the PID is CPT-DC-CBL-E=.
|