3-5
Install a lightning arrester at the input end of the power supply to enhance the lightning protection
capability of the power supply.
Install a special lightning arrester at the input end of outdoor signal lines to which interface modules
of the device are connected to enhance the lightning protection capability.
For the installation of the power lightning arrester and signal lightning arrester, refer to “Installing a
Power Lightning Arrester (Lightning Protection Busbar) (Optional)” and “Selecting and Installing a
Signal Lightning Arrester (Optional)” in Chapter 4 “Installing the Firewall”
Cabinet-Mounting Requirements
When installing the firewall in a cabinet,
Install the firewall in an open cabinet if possible. If you install the firewall in a closed cabinet, make
sure that the cabinet is equipped with a good ventilation system.
Install the firewall on a shelf of the cabinet in view of the heavy weight of the firewall.
Make sure the cabinet is sturdy enough to support the weight of the firewall and installation
accessories.
Make sure that the size of the cabinet is appropriate for the firewall, and that there is enough
clearance around the left and right panels of the device for heat dissipation.
For heat dissipation and device maintenance, it is recommended that the front and rear of the
cabinet should be at least 0.8 m (31.5 in.) away from walls or other devices, and that the headroom
in the equipment room should be no less than 3 m (118.1 in.).
Safety Precautions
Safety Signs
When reading this manual, pay attention to the following:
: Means the reader be extremely careful. Improper operation may cause device damage
or bodily injury.
: Means the reader be careful. Improper operation may cause device malfunction.
General Safety Recommendations
Keep the firewall chassis and installation tools away from walk area.
Keep the firewall far away from a moist area and heat sources.
Unplug all external cables before moving the chassis.
Electricity Safety
Locate the emergency power switch in the equipment room before installation and maintenance so
that you can switch the power off in case of an accident.
