8
4.2 Grounding
Grounding protects the device from lightning and interference. Therefore, you must ground
the device properly. You need to ground the switch before it is powered on and disconnect
the grounding cable after the device is powered off.
There is a grounding screw (see Figure 2) on the top panel for chassis grounding. After
crimping one end of the grounding cable to a cold pressed terminal, secure the end of the
grounding cable to the grounding screw and firmly connect the other end to ground.
Note
：
Cross-sectional area of the chassis grounding cable>2.5mm
2
; Grounding resistance<5
.
4.3 Power Terminal Block
There is a power terminal block on the top panel of the device. You need to connect the power
wires to the terminal block to provide power for the device. The switch supports redundant
power supply with a 4-pin 5.08mm-spacing plug-in terminal block. When one power input is
faulty, the switch can continue operating properly, thereby improving network reliability.
4-Pin 5.08mm-Spacing Plug-in Terminal Block
Figure 8 4-Pin 5.08mm-Spacing Plug-in Terminal Block (socket)
Table 3 Pin Definitions of 4-Pin 5.08mm-Spacing Plug-in Terminal Block
Pin Number
DC Wiring Definition
1
PWR1: -
2
PWR1: +
3
PWR2: -
4
PWR2: +
