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14 ciscoBus Token Ring Card and Applique Installation and Upgrade Instructions
Installation Prerequisites
Table 4
Interface Card Power Requirements
Before installing new cards, check the power requirements of the existing system and the new
card(s) to avoid exceeding the power budget. To calculate the power requirements of an existing
system, add the values for each card in the chassis; the sum is the power requirement. To determine
the available power budget, subtract that sum from 300 watts (W) (260W for chassis shipped before
10/1/91); the result is the power budget available for new interface cards. For example, to determine
if you can install two CSC-C2CTRs in an AGS+ that already contains two CSC-MCIs and a
CSC-C2MEC, determine the power requirements of the existing system, then subtract that sum
from 300. Compare the result to the total power requirement of the two new cards. If the result is
greater than the power requirement for the new cards, you can install the new cards without
exceeding the power budget. The following shows a sample calculation to determine whether two
new CSC-CTRs can be added to an AGS+ that already contains several other interface cards. (All
calculations are in watts [W].)
1. Add 4W for each external Ethernet transceiver.
Card
Power (Watts)
CSC/3
31
CSC/4
35
CSC-ENVM
10
CSC-MC+
3
CSC-MCI
28
1
CSC-SCI
20
CSC-R16M
34
CSC-1R or CSC-2R
30
CSC-CCTL (cannot be used with CSC-C2CTR)
29
CSC-CCTL2
34
CSC-FCI
50
CSC-FCIT
36
CSC-MEC
22
1
CSC-HSCI
48
CSC-C2CTR with 1 applique (2 ports)
30
CSC-C2CTR with 2 appliques (4 ports)
42
One CSC-ENVM card
1 x 10 = 10
One CSC/4 processor card
1 x 35 = 35
One CSC-CCTL2 card
1 x 34 = 34
One CSC-C2MEC card
1 x 22 = 22
Two CSC-MCI cards
2 x 28 = 56
Ten Ethernet transceivers
10 x 4 = 40
Power requirement of present system
197
Available power budget
300 – 197 = 103
Two CSC-C2CTRs, each with 2 appliques
2 x 42 = 84
New cards within power budget
84 < 103