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Proprietary*Information:*Not*for*use*or*disclosure*except*by*written*agreement*with*Calix.*
©!Calix.!All!Rights!Reserved.!
ConDC+Power+
The Calix E7-20 requires -48 VDC input power, which is then split into three power zones.
Each power zone has redundant A and B power terminations available and is connected to a
separate 30-Amp circuit breaker, for a total of six circuit breakers when both A and B feeds
are considered.
The Calix Circuit Breaker Panel (Calix Part No. 100-00573) provides protected distribution
of power. It consists of two separate circuits, A and B, each of which provides monitored
protection for three redundant power feeds to a single E7-20 shelf. A 30-Amp fuse per
circuit breaker is recommended. An alarm feature allows the Circuit Breaker Panel to provide
a warning if a circuit breaker trips. See the Calix Circuit Breaker Panel datasheet for
additional information.
The power zones are divided, as follows:
Power!Zone!
Power!Supplied!to!Components!
3
!
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Line cards 13-20
2
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Line cards 9-12, Slots A and B, Fan Tray Assembly
1
!
!
Line Cards 1-8
Note:
The E7-20 must be installed in an Isolated DC return (DC-I) configuration, where the
DC return is not connected to the grounding system.
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DANGER!!
!Risk!of!electric!shock.!Only!a!qualified!technician!should!
perform!this!procedure!
To!connect!DC!power!to!the!E7)20!
1.!
Get the 10-foot DC power cables with A and B leads from the installation kit.
2.!
On E7-20 rear panel, loosen the two captive thumbscrews securing the clear plastic
power terminal cover to the chassis, and then remove the cover.
3.!
Connect the DC power cable to each power zone ont the E7-20 chassis as follows:
