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JUNOSg 3.0 G10 CMTS Hardware Guide
28
Table 7: Power Supply Specifications
The +5.0 VDC and +3.3 VDC outputs supply a combined maximum of 175 W using load
sharing.
Power Transition Modules
The external power sources for the CMTS connect to the power transition modules. Two
power transition modules install from the rear of the chassis and plug into the midplane
opposite the power supplies in the front (see Figure 6 on page 13). The power transition
modules are provided for either AC or DC power sources, depending on how the chassis is
configured.
The outputs of the AC and DC power transition modules are wired differently within the
midplane. An AC power transition module only supports the five power supplies within its
domain. However, because the outputs of each DC power transition module are wired
together along the midplane, each DC power transition module supplies power to all 10 DC
power supplies in the chassis.
Full power redundancy consists of redundant power supplies, power transition modules, and
power sources. All G10 CMTS systems are shipped with two power transition modules
installed, one per domain, to implement power transition module redundancy. This also
facilitates power source redundancy. You must supply power from different circuits to each
power transition module to implement power source redundancy.
Each AC module has a double-pole rocker switch that serves as a power switch for the
chassis. The switch is recessed to prevent accidental activation.
The AC panel has a standard IEC 15-A receptacle with a three-prong male plug for connecting
to a power source. The DC panel has a 40-A terminal block with barrier guards for single lug
connections to the source and return.
Power Supply
Type
Input Voltage
Input Current Rating
Output
Voltage
Maximum
Output Current
AC
90 to 240 VAC
47 to 63 Hz
2.5 A Nom (110 V, 70 percent efficiency)
+5.0 VDC
25.0 A
+3.3 VDC
35.0 A
+12.0 VDC
8.0 A
–12.0 VDC
1.5 A
DC
–36 to –72 VDC
6.0 A Nom (–48 VDC)
+5.0 VDC
25.0 A
+3.3 VDC
35.0 A
+12.0 VDC
8.0 A
–12.0 VDC
1.5 A
You cannot use a 250 watt AC power supply and a
200 watt AC power supply in the same G10 CMTS chassis.
Содержание G10 CMTS
Страница 8: ... JUNOSg 3 0 G10 CMTS Hardware Guide viii ...
Страница 18: ... JUNOSg 3 0 G10 CMTS Hardware Guide 2 ...
Страница 34: ...G10 CMTS Hardware Overview JUNOSg 3 0 G10 CMTS Hardware Guide 18 ...
Страница 46: ...DOCSIS Module JUNOSg 3 0 G10 CMTS Hardware Guide 30 Figure 12 DOCSIS Module Front Panel HotSwap ...
Страница 55: ... Hardware Component Overview Chassis Control Module 39 Figure 15 Chassis Control Module Front Panel Eth0 ...
Страница 72: ...Chassis Rear Modules JUNOSg 3 0 G10 CMTS Hardware Guide 56 Figure 21 Hard Disk Module Rear Panel C O M Eth ...
Страница 82: ... JUNOSg 3 0 G10 CMTS Hardware Guide 66 ...
Страница 112: ...Rack Mounting JUNOSg 3 0 G10 CMTS Hardware Guide 96 Figure 25 Air Flow Through Chassis ...
Страница 116: ...Rack Mounting JUNOSg 3 0 G10 CMTS Hardware Guide 100 Figure 29 Rack Fully Populated with Three G10 CMTS Chassis ...
Страница 118: ...Install Power Supplies JUNOSg 3 0 G10 CMTS Hardware Guide 102 Figure 30 Power Supply Installation 1 2 ...
Страница 138: ...Connect to Power Sources JUNOSg 3 0 G10 CMTS Hardware Guide 122 Figure 39 DC Power Transition Module ...
Страница 148: ... JUNOSg 3 0 G10 CMTS Hardware Guide 132 ...
Страница 156: ...Upstream RF Measurement JUNOSg 3 0 G10 CMTS Hardware Guide 140 ...
Страница 188: ... JUNOSg 3 0 G10 CMTS Hardware Guide 172 ...
Страница 196: ...Radio Frequency RF Specifications JUNOSg 3 0 G10 CMTS Hardware Guide 180 ...
Страница 202: ...EIA Channel Plans JUNOSg 3 0 G10 CMTS Hardware Guide 186 ...
Страница 203: ... 187 Part 5 Index Index on page 189 ...
Страница 204: ... JUNOSg 3 0 G10 CMTS Hardware Guide 188 ...
Страница 209: ... Index 193 Index V ventilation 69 89 95 101 124 161 162 167 video servers 7 voltage power supply 27 ...
Страница 210: ... Index JUNOSg 3 0 G10 CMTS Hardware Guide 194 ...