11
4.4 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.
There is a grounding screw (see Figure 1) on the front panel of the device. The
screw is 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.
4.5 Power Terminal Block
There is a power terminal block on the front panel of the device. You need to
connect the power cable to the terminal block to provide power to the device.
The device supports redundant (PWR1 and PWR2) power supply with a 5-pin
5.08mm-spacing plug-in terminal block. When one power supply is faulty, the
switch can continue operating properly, thereby improving network reliability.
Figure 14 5-Pin 5.08mm-Spacing Plug-in Terminal Block
PWR1
PWR2
1 2 3 4 5
+/L
+/L
-/N
-/N
Note:
Cross-sectional area of the chassis grounding cable>2.5mm
2
;
Grounding resistance<5Ω.
Note:
●
0.75mm
2
<Cross-sectional area of the power cable<2.5mm
2
;
grounding resistance<5Ω.
●
Use copper conductors only, temperature rating 75
℃
only.
●
5-pin 5.08mm-spacing plug-in terminal block