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CHAPTER 7: FANS
The switch comes from the factory with two PSUs and five fan modules installed in the chassis. The fan modules and the power
supplies, which have integrated fans, are hot-swappable.
In addition to the power supply modules, you can order and install fan modules separately.
The switch supports normal airflow direction. Do not mix airflow types in a chassis; you can use only a single airflow direction in a
chassis. If the airflow directions are mismatched, the switch issues an alarm. You must correct the mismatched airflow direction.
Normal—airflow is from the I/O panel to the PSU.
All fans and PSUs in a configuration must be in the same airflow direction.
Environmental factors can decrease the amount of time required between fan replacements. Check the environmental factors
regularly. An increase in temperature and/or particulate matter in the air might affect performance; for example, new equipment
installation.
CAUTION: Check the fans at six-month intervals and replace them as necessary. Regularly monitor the speeds of the fans to
accurately determine replacement intervals.
7.1 COMPONENTS
The following are the EMS100G-32 fan components.
• EMS100G-32 Fan module
FIGURE 7-1. FAN MODULES
7.2 FAN MODULE INSTALLATION
The fan modules in the switch are field replaceable.
Module slot 1 is on the left side of the chassis, module slot 2 is in the middle of the chassis, and module slot 5 is on the right side of
the chassis.
CAUTION: DO NOT mix airflow directions. All fans must use the same airflow direction—reverse or normal. If you mix the airflow
direction, the switch detects the discrepancy and issues an alarm. You must correct the mixed airflow direction.
1. Take the fan module out of the shipping box.
2. Slide the module into the bay.
