3-4
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 3 Card Reference
Electrical Card Protection
Note The ONS 15454 SDH is a flexible metro optical transport system supporting a wide variety of
applications. The power consumption of the shelf assembly varies depending upon shelf
configuration. Your power distribution network can be designed based on your maximum ONS 15454
SDH system power draw, or use the ONS 15454 SDH’s maximum rated shelf power draw.
If you select to design your power plant to your maximum planned ONS 15454 SDH system
configuration, the “Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3” lists the
power consumption for each card that can be used to determine your maximum ONS 15454 SDH
system power draw. The general guideline for fuse selection is 20% above the maximum calculated
system power draw.
If you design your power system to the ONS 15454 SDH’s maximum rated shelf power draw, Cisco
recommends that you select a power distribution system supporting a minimum capacity of 30 amps
for each A and B power feeder on each ONS 15454 SDH shelf assembly. Feeder lines should be fused
at 30 amps. This recommendation is based on the shelf assembly’s current rated maximum power
draw of 30 amps at -48VDC. The maximum power draw configuration on the ONS 15454 SDH, based
on the hardware available with Release 3.3, requires 30 amps at -48VDC.
3.2 Electrical Card Protection
The ONS 15454 SDH provides a variety of electrical card protection methods. This section describes the
protection options. Figure 3-1 shows a 1:1 protection scheme and Figure 3-2 shows a 1:N protection
scheme.
OC3 IR 4/STM1 SH 1310 19.20 0.40 0.47 65.6
OC12 IR/STM4 SH 1310 10.90 0.23 0.27 37.2
OC12 LR/STM4 LH 1310 9.28 0.19 0.23 31.7
OC12 LR/STM4 LH 1550 9.28 0.19 0.23 31.7
OC48 IR/STM16 SH AS 1310 37.20 0.78 0.92 127.0
OC48 LR/STM16 LH AS 1550 37.20 0.78 0.92 127.0
OC48 ELR/STM16 EH 100 GHz 31.20 0.65 0.77 106.5
OC192 LR/STM64 LH 1550 72.20 1.50 1.78 246.5
E100T-G 65.00 1.35 1.60 221.9
E1000-2-G 53.50 1.11 1.32 182.7
G1000-4 63 1.31 1.56 215.1
Fan-Tray -48V DC 53 1.10 1.31 181.0
Table 3-4 Card Power Consumption for the ONS 15454 SDH (continued)
Card Watts
Amperage
at -48V
Amperage
at -40.5V BTU/hr
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