6
• Use electromagnetic shielding, for example, shielded interface cables, when necessary.
• To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning
strikes, route interface cables only indoors. If part of the network cable of an Ethernet port must
be routed outdoors, connect a lightning arrester to the cable before you plug the cable into the
port.
Lightning protection
To protect the firewall from lightning better, do as follows:
• Make sure the grounding cable of the chassis is reliably grounded.
• Make sure the grounding terminal of the AC power receptacle is reliably grounded.
• Install a lightning arrester at the input end of the power module to enhance the lightning
protection capability of the power module.
Power supply
Verify that the power system at the installation site meets the requirements of the power modules,
including the input method and rated input voltage. For more information, see "Appendix A Chassis
views and technical specifications."
Installation tools
No installation tools are provided with the firewall. Prepare installation tools yourself as required.
Table 5 Installation tools
Flathead screwdriver Phillips screwdriver Needle-nose pliers Marker
Diagonal pliers ESD wrist strap Wire-stripping pliers Crimping tool
Installation accessories
Table 6 Installation accessories
M6 rack screw
(user supplied)
M4 mounting bracket screw Cage nut Grounding cable
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