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SMU11B Site Monitoring Unit
User Manual
CA UTION
● Performing maintenance or replacing components may interrupt power to the
loads if battery reserve is insufficient. Ensure that the switches for primary
loads are in the ON position and do not turn off the battery switch and the AC
input switch at the same time.
● Obtain prior written consent from the customer if load disconnection is
required.
● Do not perform maintenance on rainy days. Otherwise, rain water can enter
the system and damage devices and components.
Prerequisites
●
An ESD wrist strap, ESD gloves, and ESD box or bag are available.
●
The new monitoring module is intact.
Procedure
Step 1 Connect the ground cable of the ESD wrist strap, and wear the ESD wrist strap and
ESD gloves.
Step 2 Record the cable connection positions on the panel of the monitoring module,
remove the COM communications cables, and remove the signal cable terminals.
Step 3 Pull out the handle of the monitoring module to remove it from the subrack.
Figure 6-1 Removing the old monitoring module
Issue 03 (2022-06-06)
6
Replacing an SMU11B
Copyright © Huawei Technologies Co., Ltd.
6 Replacing an SMU11B
29
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