Installation Manual
Quidway S3526 Ethernet Switch Chapter 3 Installation
3-3
3.2.3 Anti-interference Requirement
A switch in use may be affected by the interference sources outside the system in a way
of capacitance coupling, inductance coupling, radiation of electromagnetic wave,
common impedance (including the grounding system) or conducting line (power line,
signaling line and transmission line etc.). Therefore, the following should be
considered:
If AC supply system is TN system, AC power socket should be a single-phase
three-line power socket with PE (Protection Earth). Thereby, the filter circuit in the
equipment can effectively filter interference from the power supply system.
Keep the switch far away from radio launcher, radar launcher, and high-frequency
devices working in high currents.
Adopt the measure of electromagnetic shielding if necessary. For example, you
can adopt shielded interface cable.
Interface cable must be run indoors, and outdoor cabling is not permitted, in case
that overvoltage and overcurrent damage the device.
Caution:
If the cable has to be run outdoors, please select proper lightning arrester. Refer to the appendix for the
description of arrester installation.
3.2.4 Laser Radiation Avoidance
In operating status, it is prohibited to stare into the open optical interface because the
laser being transmitted through the optical fiber will produces a small beam of light, it
has very high power density and is invisible to human eyes, when a beam of light enters
the eye, retinal may be burned.
Warning:
Staring at the laser beam inside the fiber could hurt your eyes.
To Next Page
Loading...
Need help?
General
