4 Power Input Module
4 Power Input Module
4.1 Overview
The DC48 power input module for 8665 Smart Router offers -48 Vdc supply interface. 8665 Smart
Router subrack provides two power input modules (PIM) on the front side of the NE. Tw o power
input modules enable redundant power feeding . The nominal input v oltage is -48 Vdc. The -48 Vdc
output of the PIM is routed to the backp lane for the use of line units, switch units and fans.
The PIM features are the following:
• Input over-current protection (fuses)
•EMIfiltering
• Input transient overvoltage protection
• Input volt age status monitoring
• Input voltag e status LED
• 3,6 V auxiliary Po wer S upp ly Unit (PSU)
4.2 Operation
The input voltage is fed throu gh the input fuses and filters to the backplane. The PIM also includes
transient overvoltage protection. Redundancy is realized b y u s ing two PIMs in the NE. There is no
active current sharing between the two PIMs. However, in the case of equal inp ut v oltages at input
connectors the current will be divided rather equally between the tw o PIMs. One PIM is a ble to
supply the whole current required by the 8665 Smart Router su br ack in case of failu re in ot her PIM.
76.8670-40128B 8600 Smart Rou ters
© 2015 Coriant. 8665 Smart Router FP7.0 Reference Manual
45
To Next Page
Loading...
