Connection
9
4.3 Grounding
Grounding protects the device from lightning and interference. Therefore, you must ground
the device properly. You need to ground the device before it is powered on and disconnect
the grounding cable after the device is powered off.
The device provides a grounding screw(see Figure 2) on the rear panel for chassis
grounding. After crimping one end of the grounding cable to a cold pressed terminal, secure
the end to the grounding screw and connect the other end to the earth firmly.
Note
：
Cross-sectional area of the chassis grounding cable>2.5mm
2
; grounding resistance<5
.
4.4 Power Terminal Block
There is a power terminal block on the rear panel of the device. You need to connect the
power wires to the terminal block to provide power to the device. The device supports single
(PWR1) and redundant (PWR1 and PWR2) power supply with a 4-pin 5.08mm-spacing
plug-in terminal block. When the redundant power supply is used and one power input is
faulty, the device can continue operating properly, thereby improving network reliability.
Note
：
0.75mm
2
<Cross-sectional area of the power wire<2.5mm
2
; grounding resistance<5
.
4-Pin 5.08mm-Spacing Plug-in Terminal Block
