RG-SS6510
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4C Series Switch Hardware Installation and Reference Guide
Preparation before Installation
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Any nonstandard and inaccurate electrical operation can cause accidents such as fires or electrical attacks, thus
causing severe, or even fatal damages to human bodies and the devices.
Direct or indirect touch through a wet object on high-voltage and mains supply can bring a fatal danger.
If a power supply system is equipped with a leakage protector (also referred to as "leakage current switch" or
"leakage current breaker"), the rated leakage action current of each leakage protector is greater than twice of the
theoretical maximum leakage current of all the power supplies in the system. For example, if a system is equipped
with eight identical power supplies, the leakage current of each power supply is equal to or less than 3 mA, and the
leakage current of the system totals 24 mA. A leakage protector with 30 mA rated action current supports less than
five power supplies (that is, Action current of the leakage protector/2/Maximum leakage current of each power
supply = 30/2/3 = 5). In other words, the leakage protector with 30 mA rated action current supports no more than
four power supplies. In this case, the eight power supplies in the system require at least two leakage protectors
with 30 mA rated action current and each leakage protector supports four power supplies. If power supplies in a
system differ in models, the rated leakage action current of each leakage protector divided by two is greater than
the sum of maximum leakage current of all the power supplies. The rated leakage non-action current of a leakage
protector shall be 50% of the leakage action current. Take a leakage protector with 30 mA rated leakage action
current as an example. The rated leakage non-action current shall be 15 mA. When the leakage current is below
15 mA, the protector shall not act. Otherwise, misoperation may easily occur due to high sensitivity and thus the
leakage protector trips, devices are powered off, and services are interrupted.
To guarantee personal safety, the rated leakage action current of each leakage protector in the system must be
equal to or less than 30 mA (human body safety current is 30 mA). When twice of the total leakage current of the
system is greater than 30 mA, the system must be equipped with two or more leakage protectors.
For the leakage current value of each power supply model, see the power supply model parameter table in
Chapter 1.
2.1.4 Electrostatic Discharge Damage Precautions
The RG-S6510-4C designing gives a great consideration to prevent electrostatic discharge damage and adopts
multiple measures. But if the electrostatic exceeds certain limit, it can still cause great damages to the circuitry and the
device. In networks connected by the RG-S6510-4C, the major sources of electrostatic induction are outdoor high
voltage transmission cables, lightening, indoor floor materials and the machine structure.
Pay attention to the following tips:
The device and the floor are well grounded.
Take dust prevention measures in the room.
Maintain an appropriate humidity.
When the pluggable modules of the switch are being installed, wear antistatic wrist strap and make sure the
antistatic wrist strap is well grounded.
Do not use bare hand to directly touch the components and the printed-circuit board (PCB) when the boards are
used.
Use an anti-static shielding bag to properly store the board.
Do not let any clothes touch a circuit board. An antistatic wrist strap can only prevent human static electricity from
damaging the circuit board, but cannot prevent any static electricity on clothes.
