ZyXEL Communications GS-4012 - Manual (Page 49)

Chapter 3 Hardware Overview
GS-4012F/4024 User’s Guide
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Figure 14 Rear Panel: GS-4012F
Figure 15 Rear Panel: GS-4024
Figure 16 Rear Panel: GS-4012F (DC Model)
Figure 17 Rear Panel: GS-4024 (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 GS-4012F/4024 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 GS-4012F DC unit requires DC power supply input of -48V DC to -60V DC, 1.6A Max
no tolerance and the GS-4012F DC unit requires DC power supply input of -48V DC to -60V
DC, 2.2A Max no tolerance. To connect the power to the DC units, 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 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.