Redundancy Control - Emerson AXP1620 Installation And Use Manual

Redundancy Control

7.5.2
AXP1620 Installation and Use (6806800E23E)
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Table 7-7 Cooling Budget (continued)
Ambient Temperature
40°C
55°C
The values for S1, S2, T1, and T2 are configurable.
In abnormal operating conditions; that is, when a blade thermal sensor is approaching or
crossed its upper non-critical threshold, the SAM automatically adjusts the fan speeds to a point
where all the blade thermal sensors are just below their upper non-critical threshold (minus a
user configurable offset).
The dynamic minimum fan level is not used.
Each fan tray has six fan units and each fan unit has an inlet and outlet fan. Fan speeds for all
level settings are summarized in the next table.
Fan Level
1
10
20
30
40
50
60
70
80
90
100
Redundancy Control
The ShMM-1500R supports redundant operation with automatic switchover using a redundant
ShMM-1500R. In a configuration where two ShMM-1500Rs are present, one acts as the active
shelf manager and the other as a standby. Both ShMM-1500Rs monitor each other, and either
can trigger a switchover if necessary.
The ShMM-1500R provides a number of hardware redundancy signals on the CN1 connector.
The HRI is implemented using the FPGA device.
Temperature Rise
Delta T = 15° C
Delta T = 10° C
Speed in RPMs
1800 Inlet, 1100 Outlet +/-10%
2600 Inlet, 1500 Outlet +/-10%
3200 Inlet, 2000 Outlet +/-8%
3900 Inlet, 2400 Outlet +/-8%
4500 Inlet, 2900 Outlet +/-5%
5100 Inlet, 3300 Outlet +/-5%
5800 Inlet, 3700 Outlet +/-5%
6400 Inlet, 4200 Outlet +/-5%
7000 Inlet, 4500 Outlet +/-5%
7600 Inlet, 5000 Outlet +/-5%
8000 Inlet, 5200 Outlet +/-5%
Shelf Management Alarm Module
127