Troubleshooting guide

Section 2, Engineering Guidelines - Power Dissipation Considerations
61186003L1-1D 2-7
POWER DISSIPATION CONSIDERATIONS
Power Dissipation for an MX2820 Shelf
Table 2-8 provides the heat dissipation data for each module at –48 VDC.
Note: x indicates the list version.
Table 2-9 provides the heat dissipation for a fully loaded M13 system at –48 VDC for a single
19-inch shelf and a single 23-inch shelf deployment.
Note: x indicates the list version.
Table 2-8. Module Heat Dissipation at –48 VDC
Part Number Description Heat Dissipation
Common Modules
1186003Lx SCU 3.26 W
1186004L1 Clock Module 2.50 W
Multiplexer Modules
1186002Lx M13 MUX (redundant pair) 16.32 W
1186005L1 STS-1 MUX (redundant pair) 15.94 W
Accessories
1181006L1 (23-inch) Fan 9.6 W
1182006L1 (19-inch) Fan 9.6 W
1186006L1 (23-inch) Pusher Fan 14.4 W
1184507L1 (19-inch) Pusher Fan 14.4 W
Table 2-9. Heat Dissipation for Fully Loaded M13 System at –48 VDC
Part Number Description Quantity Heat
Dissipation
Quantity
times Watts
Total Watts
19-inch shelf
1186003Lx SCU 1 3.26 W 1 x 3.26 W 3.26 W
1186002Lx M13 MUX 7 redundant
pairs
16.32 W
each
7 x 16.32 W 114.24 W
Total watts 117.50 W
23-inch shelf
1186003Lx SCU 1 3.26 W 1 x 3.26 W 3.26 W
1186002Lx M13 MUX 9 redundant
pairs
16.32 W
each
9 x 16.32 W 146.88 W
Total watts 150.14 W