Esd; Laser - Ruijie Reyee RG-NBS3100-24GT4SFP-V2 Installation Manual

Installation Guide

If a power supply system is equipped with a leakage protector (leakage current switch or breaker), the
rated leakage action current of each leakage protector is twice greater than the maximum leakage current
of all the power supplies in the system. For example, if a system is equipped with twenty identical power
supplies, the leakage current of each power supply is equal to or less than 1.5 mA, and the total leakage
current of the system is 30 mA. A leakage protector with 30 mA rated action current supports less than ten
power supplies (that is, action current of the leakage protector/2/maximum leakage current of each power
supply = 30/2/1.5 = 10). In other words, the leakage protector with 30 mA rated action current supports no
more than ten power supplies. In this case, the twenty power supplies in the system require at least two
leakage protectors with 30 mA rated action current and each leakage protector supports ten 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 must be 50% of the leakage action current.
The leakage protector with 30 mA rated leakage action current is used as an example. The rated leakage
non-action current must be 15 mA. When the leakage current falls below 15 mA, the protector should 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 details of the leakage current value of each power supply model, see Chapter 1 Product Overview.
2.1.4

ESD

To prevent Electronic Static Discharge (ESD), pay attention to the following points:

Proper grounding of grounding screws on the back panel of the device, and three-wire single-phase socket
with protective earth wire (PE) used as the AC power socket.

Indoor dust prevention

Proper humidity conditions
2.1.5

Laser

The RG-NBS3100 series switches support varying models of optical modules (Class I laser products) sold on
the market. Improper use of optical modules may cause damage. Therefore, pay attention to the following
points:

When a fiber transceiver works, ensure that the port has been connected to an optical fiber or is covered
with a dust cap, to keep out dust and avoid burning your eyes.

When the optical module is working, do not pull out the fiber cable or look directly into the transceiver. The
transceiver emits laser light that may hurt your eyes.
Cauiton
Do not stare into any optical port under any circumstances because this may cause permanent damage to your
eyes.
6
Preparation before Installation