Power Connector; External Backup Power Supply Connector; Figure 13 Rear Panel - Ac Model; Figure 14 Rear Panel - Dc Model - ZyXEL Communications ES-4124 User Manual

Figure 13 Rear Panel - AC Model

Figure 14 Rear Panel - DC Model

3.2.1 Power Connector

Make sure you are using the correct power source as shown on the panel.
To connect the power to the ES-4124 AC unit, insert the female end of power cord to the
power receptacle on the rear panel. Connect the other end of the supplied power cord to a
100~240V AC, 1.5A power outlet. Make sure that no objects obstruct the airflow of the fans.
The ES-4124 DC unit requires DC power supply input of -48V DC to -60V DC, 1.5A Max no
tolerance. To connect the power to the unit, insert one end of the supplied power cord to the
power receptacle on the rear panel and the other end to a power outlet. Make sure that no
objects obstruct the airflow of the fans.

3.2.2 External Backup Power Supply Connector

The switch supports external backup power supply (BPS).
The backup power supply constantly monitors the status of the internal power supply. The
backup power supply automatically provides power to the switch in the event of a power
failure. Once the switch receives power from the backup power supply, it will not
automatically switch back to using the internal power supply even when the power is resumed.
Chapter 3 Hardware Overview
ES-4124 User's Guide
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