Power Requirements; System Grounding Requirements; Safety Ground; Lightning Ground - D-Link DES-7200 Hardware Installation Manual

DES-7200 Hardware Installation Guide
Apart from dust, the salt, acid and sulfide in the air in the equipment room must also meet
strict r equirements, as s uch poi sonous s ubstances may accelerate t he c orrosion of t he
metal and t he aging of s ome p arts. T he equ ipment room s hould be pr otected f rom t he
intrusion of harmful gases (for example, sulfur dioxide, sulfured hydrogen, nitrogen dioxide,
and chlorine), whose requirements are listed in Table 2-3.
Table 2-3 Requirements for Harmful Gases in the Equipment Room
Gas
Sulfur dioxide
Sulfured hydrogen
Nitrogen dioxide
Ammonia
Chlorine
2.2.5

Power Requirements

When the DES-7210/7206 uses the AC power supply:
AC input voltage: 90Vac~264Vac, 47Hz~63Hz
Power: 1200W/2000W
When the DES-7210/7206 uses the DC power supply:
DC input voltage: DC - 36Vdc ~ -75Vdc
Power: 1200W/2000W
Note
2.3

System Grounding Requirements

A g ood grounding s ystem i s t he bas is f or t he stable and r eliable o peration of t he
DES-7210/7206. It is the chief condition to prevent lightning stroke and resist interference.
Please c arefully c heck t he gr ounding c onditions o n t he installation s ite ac cording to t he
grounding requirements, and perform grounding properly as needed.
2.3.1

Safety Ground

The equipment using AC power supply must be grounded by using the yellow/green safety
grounding cable. Otherwise, when the insulating resistance decreases the power supply and
the enclosure in the equipment, electric shock may occur.
2.3.2

Lightning Ground

The l ightning pr otection s ystem of t he f acility is a separate s ystem t hat c onsists of t he
lightning rod, downlead conductor and the connector to the grounding system, which usually
shares t he po wer r eference gr ound an d yellow/green s afety c able gr ound. T he l ightning
discharge ground is for the facility only, irrelevant to the equipment.
Average (mg/m
0.2
0.006
0.04
0.05
0.01
The DES-7210/7206 provides 1+1 redundancy of power supply. You are
recommended to use multiple power supplies for the equipment to ensure
its c ontinuous and s table working b y a voiding t he i mpact o f unex pected
power failures on t he e quipment. However, you must not e t hat the
redundancy p ower s upplies must be of t he s ame t ype; a m ix of po wer
supplies is not allowed.
3
) Maximum (mg/m
1.5
0.03
0.15
0.15
0.3
3
)
2-7