System Design
XDM® -100
4-12
ECI Telecom Ltd. Proprietary
417006-2005-013-A02
4.6 Power Feed
Integrated in the MXC, the power feed subsystem serves as an interconnection
device between the modem card and -48 to -60 V DC power sources. The main
purpose of this unit is to decouple the noise generated/received from the DC power
source lines.
The XDM-100 features a fully redundant power feed subsystem with two external
power inputs available. A redundant xINF unit is located on each MXC card. The
filter can be connected to both power inputs and distributes the -48 to -60 V DC
battery plant inputs to all cards and modules via fully redundant power buses. Each
card or module generates its own local voltage using high-quality DC/DC
converters, with a maximum supply power of 550 W per shelf (without the Tributary
Protection Unit, see Section
4.7). This distributed power concept assures system
upgrading and efficient heat distribution. It also ensures maximum reliability of the
power feed interface.
Figure
4-6: Power distribution
Additional features of the power feed subsystem include:
♦
Reverse polarity protection
♦
Overvoltage protection
♦
Overcurrent and short-circuit protection
♦
Redundancy and current sharing between xINF units
♦
Hot swap
♦
Power fail detection and 10 ms holdup
♦
Undervoltage detection
♦
Lightening-strike protection
Summary of Contents for XDM-100
Page 1: ...XDM 100 Miniature MSPP for Metro Access and Cellular Networks General Description ...
Page 3: ...XDM 100 ...
Page 8: ...Contents XDM 100 iv ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 10: ...Contents XDM 100 vi ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 12: ...Contents XDM 100 viii ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 16: ...Introduction XDM 100 1 4 ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 22: ...Applications XDM 100 2 6 ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 30: ...System Characteristics XDM 100 3 8 ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 44: ...System Design XDM 100 4 14 ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 82: ...XDM 100H XDM 100 8 8 ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 94: ...Glossary XDM 100 B 6 ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...
Page 98: ...Index XDM 100 I 4 ECI Telecom Ltd Proprietary 417006 2005 013 A02 ...