Ruijie RG-S6120 Series Switches Hardware Installation and Reference Guide
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.
The RG-S6120 series switch has more than one input power supply. Please unplug all power cables after
powering off the switch.
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 16 identical power supplies, the leakage current of each power supply is equal to or less than 1.75 mA, and
the leakage current of the system totals 28 mA. A leakage protector with 30 mA rated action current supports less
than nine power supplies (that is, Action current of the leakage protector/2/Maximum leakage current of each
power supply = 30/2/1.75 = 8.57). In other words, the leakage protector with 30 mA rated action current supports
no more than eight power supplies. In this case, the 16 power supplies in the system require at least two leakage
protectors with 30 mA rated action current and each leakage protector supports eight 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 currents 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-S6120 series switch
adopts multiple measures to prevent electrostatic discharge damage. 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-S6120 series switch
, the major sources of electrostatic induction include outdoor high voltage
transmission cables, lightening, indoor floor materials and the machine structure.
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 anti-static wrist strap and make sure the
anti-static 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.
