H3C Technologies H3C SR6600 - Manual (Page 30)

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Installing a signal lightning arrester (optional)
NOTE:
No signal lightning arrester is shipped with the router unless ordered.
Generally, you need to connect a signal lightning arrester (a transient over-voltage protection) before
connecting a signal cable to the router. This can protect electronic devices against surge over-voltage
resulting from lightning strokes and other interferences, and minimize impact on the router.
The signal lightning arrester is serially connected to a signal cable, so the signal lightning arrester must
satisfy the requirements of network performance indexes such as data transmission bandwidth, as well
as the lightning protection performance requirement. Before installing a signal lightning arrester,
consider such performance indexes of the lightning arrester as lightning protection, bandwidth,
transmission loss, and port type.
The SR6602 supports the following types of signal lightning arresters:
• Voltage-limiting protection – signal lightning arrester – maximum discharge current
2.5KA/protection voltage 25V--SMB-75J/ SMB-75J-1W-10Mbps
• Voltage-limiting protection – signal lightning arrester – maximum discharge current
2.5KA/protection voltage 25V-BNC-75K/ BNC-75K-10Mbps
• Voltage-limiting protection – signal lightning arrester (U port) - maximum discharge current
3KA/common-mode 400V/differential mode 170V-RJ11
CAUTION:
The signal lightning arrester should be grounded as near as possible. The grounding resistance must be
less than 4 ohms. The grounding resistance must be less than 1 ohm if there are special grounding
requirements.
Follow these steps to install a signal lightning arrestor:
Step1 Use a double-faced adhesive tape to stick the signal lightning arrester to the router. The signal lightning
arrester should be as close to the grounding screw as possible.
Step2 Cut short the grounding cable of the signal lightning arrester according to its distance to the grounding
screw. Then, fix the grounding cable onto the grounding screw of the router.
Step3 Use a multimeter to check the connection between the grounding cable of the signal lightning arrester
and the grounding screw of the router.
Step4 Follow the instructions to connect the signal lightning arrester with a transit cable. The external cable
should be connected to the IN end and the transit cable to the OUT end. Check whether the LED on the
interface module is normal.
NOTE:
Read the instructions carefully before installing the signal lightning arrester.
Step5 Bundle the cables with a cable tie.