7
Temperature
• Operating:
Without drives: 0°C to 45°C (32°F to 113°F)
With drives: 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 drives: 5% RH to 95% RH,
noncondensing
With drives: 10% RH to 90% RH, noncondensing
• Storage: 5% RH to 95% RH, noncondensing
Cleanness
• Dust concentration ≤ 3 × 10
4
particles/m
3
• No dust on desk within three days
ESD prevention
• The equipment, workbench, and rack are reliably
grounded.
• The equipment room is dust-proof.
• The humidity and temperature are at an acceptable
level.
• Wear an ESD wrist strap and make sure it makes
good skin contact and is reliably grounded when
installing FRUs.
• Put the removed interface modules away on an ESD
workbench, with the PCB upward, or put them in ESD
bags for future use.
• Touch only the edges, instead of electronic
components when observing or moving a removed
interface module.
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.
Electricity safety
• Equip a UPS.
• Locate the power switch in the equipment room. In
case of emergency during operation, switch off the
power switch.
Rack-mounting
requirements
• Make sure the cabinet is equipped with a good
ventilation system.
• The rack is sturdy enough to support the weight of the
firewall and installation accessories.
• The size of the rack is appropriate for the firewall.
• The front and rear of the rack are a minimum of 0.8 m
(31.50 in) away from walls or other devices.
Safety
precautions
• The firewall is far away from any moist area and heat source.
• The emergency power switch in the equipment room is located.
• Installation accessories supplied with the firewall
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