
Installing the Backup Power Supply (Optional)
Install the backup power supply in the ONline System Concentrator (if ordered). This power supply provides power redundancy if the primary power supply should fail. Skip this section if you do not have a backup power supply.
To install the backup power supply, you must first remove the fan unit from the power supply slot in the back of the unit. Follow the steps below to install the backup power supply:
1.Remove and save the four screws that attach the fan unit to the rear of the concentrator as shown in Figure
Figure 2-6. Removing Fan Unit
2.Carefully remove the fan unit and disconnect the fan unit wiring harness from the connector inside the base of the ONline unit as shown in Figure
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