7
3.2.3 SFP Port
The signal is transmitted through laser by optical fiber cable. The laser conforms to the
requirement of level 1 laser products. To avoid injury of eyes, do not look at the 1000 Base-X
optical port directly when the device is powered on.
Figure 3-6 SFP module structure
Figure 3-7 SFP module installation
Installing SFP Port
Before installing SFP module, wear antistatic gloves, and then wear antistatic wrist strap. Make
sure that the antistatic gloves and the antistatic wrist strap are in good contact.
1. Lift the handle of SFP module upward vertically, and stuck it to the top hook.
2. Hold the SFP module by both sides, and push it gently into the SFP slot till the SFP module
is firmly connected to the slot (both the top and bottom spring strip of the SFP module are
firmly stuck with the SFP slot).
3.2.4 GND
Figure 3-8 GND terminal
Normal GND of the device is the important guarantee for device lightning protection and
anti-interference. You should connect the GND cable before powering on the device, and
power off the device before disconnecting the GND cable.
There is a GND screw on the device cover board for the GND cable, which is called enclosure
GND. Connect one end of the GND cable with the cold-pressed terminal, and fix it on the
enclosure GND with the GND screw. The other end of the GND cable should be reliably
connected to the ground.
The sectional area of the GND cable shall be more than 2.5 mm², and the GND resistance shall
be less than 4
Ω.