ZyXEL ES-3124PWR User Guide - Page 42
External Backup Power Supply Connector, Powering on the Switch
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Chapter 3 Hardware Overview 4 Connect one end of a power wire to the Switch's -48V (input) pin and tighten the captive screw. 5 Connect the other end of the power wire to the negative terminal on the power supply. 6 Insert the terminal block plug in the Switch's terminal block header. 3.3.3 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. 3.3.4 Powering on the Switch 1 Turn on the power supply first. 2 Move the Switch power switch to the ON position. 3.4 LEDs The following table describes the LEDs. Table 3 LEDs LED COLOR STATUS DESCRIPTION BPS Green Blinking The Switch is receiving power from the backup power supply. On The backup power supply is connected and active. Off The backup power supply is not ready or not active. PWR Green On The Switch is turned on. Off The Switch is off. SYS Green Blinking The Switch is rebooting and performing self-diagnostic tests. On The Switch is on and functioning properly. Off The power is off or the Switch is not ready/malfunctioning. ALM Red On There is a hardware failure. Off The Switch is functioning normally. Ethernet ports (ES-3124 and ES-3124-4F only) LNK/ACT Green Blinking The Switch is transmitting/receiving to/from a 10 Mbps Ethernet network. On The link to a 10 Mbps Ethernet network is up. Amber Blinking The Switch is transmitting/receiving to/from a 100 Mbps Ethernet network. On The link to a 100 Mbps Ethernet network is up. Off The link to an Ethernet network is down. FDX Amber On The port is negotiating in full-duplex mode. 42 ES-3124 Series User's Guide