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These are the 48 Volt DC power suplies. Depending on the
configuration, how many modules are plugged in with all the daughter boards, we did
measure more than 200 watts per module (blade). But the 4 Lucent DC supplies in the bottom
cage are supplying 750 watts each. That is enough for all possible
modules in 8 slots. We did find out, that the load balancing works fine. You need some
more than two units can supply, and with 3 units, you are below the 75% load of each. If
you have 4, your system is fault tolerant for a very long term.
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| We have got the data sheets of the Lucent / Tyco power modules and the chassis to load
here : (The PDF´s have 198 KB and 183 KB size) |
../download/lucent-ps3k-datasheet.pdf
and
../download/lucent-rm750-datasheet.pdf |
| Looking to the 48 Volts DC concept, you see easyly, that the main EX 4800
unit was build on a pure 48 Volts DC level for carrier class operation. This is one of the
very rare units, where you do not need two types of power supplies like Cisco and Ascend
and Nortel and others. However, the Lucent RM 750 are state of the art products. We did
open a unit after 3 years of operation. It looks like new. Nothing was burned or "a
little bit brown". All components seem to be oversized for very long reliable
operation. Reading the specs in the PDF´s above, you see the extreme temperature range,
these units will work without stress.
Within this class of quality, it is normal, that there are computer signal outputs for
anything and everything. |
| Please notice, that you need the same power cords like a Cisco 7513 router
or a battery power system like an APC 2200 RMI. We have them all, so we have just a
balanced number of power cords for our units. These cords are rare and expensive and if
you need them urgently, you will find none to buy. - - - So get them first before
you start. |
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| any suggestions ? any hints ? : goto our new
e-mail page |
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