7
Cable tie
(user supplied)
Slide rails and chassis rails
Mounting brackets with
cable management
brackets
Pre-installation checklist
Table 7 Checklist before installation
Item Requirements
Installation
site
Ventilation
•
There is a minimum clearance of 100 mm (3.94 in) around the inlet
and outlet air vents for heat dissipation of the firewall chassis.
•
A ventilation system is available at the installation site.
Temperature
•
Operating:
{
Without hard disks: 0°C to 45°C (32°F to 113°F)
{
With hard disks: 5°C to 40°C (41°F to 104°F)
•
Storage: –40°C to +70°C (–40°F to +158°F)
Relative humidity
•
Operating:
{
Without hard disks: 5% RH to 95% RH, noncondensing
{
With hard disks: 10% RH to 80% RH, noncondensing
•
Storage:
{
Without hard disks: 5% RH to 95% RH, noncondensing
{
With hard disks: 5% RH to 90% RH, noncondensing
Cleanness
•
Dust
concentration
≤
3 × 104 particles/m3
•
No dust on desk within three days
ESD prevention
•
The firewall and the rack are reliably grounded.
•
The equipment room is dust-proof.
•
The humidity and temperature are at an acceptable level.
•
Always wear ESD clothing, ESD gloves, and an ESD wrist strap
and when you install and remove a transceiver module.
•
Put the removed interface modules on an ESD workbench, with the
PCB upward, or put them in ESD bags for future use.
EMI prevention
•
Take effective measures to protect the power system from the
power grid system.
•
Separate the protection ground of the firewall from the grounding
device or lightning protection grounding device as far as possible.
•
Keep the firewall far away from radio stations, radar and
high-frequency devices working in high current.
•
Use electromagnetic shielding when necessary.
Lightning
protection
•
The grounding cable of the chassis is reliably grounded.
•
The grounding terminal of the AC power receptacle is reliably
grounded.
•
(Optional) A power lightning arrester is installed.
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.
