Lantronix
SM12XPA Install Guide
33847 Rev. B
28
Network Safety
This subclause sets forth a number of recommendations and guidelines related to safety concerns. The list is
neither complete nor does it address all possible safety issues. The designer is urged to consult the relevant local,
national, and international safety regulations to verify compliance with the appropriate requirements. LAN cabling
systems described in this clause are subject to at least four direct electrical safety hazards during their installation
and use. These hazards are as follows:
a) Direct contact between LAN components and power, lighting, or communications circuits.
b) Static charge buildup on LAN cabling and components.
c) High-energy transients coupled onto the LAN cabling system.
d) Voltage potential differences between safety grounds to which various LAN components are connected.
Such safety hazards should be avoided or appropriately protected against for proper network installation and
performance. In addition to provisions for proper handling of these conditions in an operational system, special
measures should be taken to verify that the intended safety features are not negated during installation of a new
network or during modification of an existing network.
Equipment shall comply with all applicable local and national codes related to safety.
Safety Instructions for Rack Mount Installations
The instructions below (or similar) are intended for rackmount installation environments:
1. Elevated Operating Ambient: if installed in a closed or multi-unit rack assembly, the operating ambient
temperature of the rack environment may exceed room ambient. Install the equipment in an environment
compatible with the maximum ambient temperature (Tma) specified.
2. Reduced Air Flow: install the equipment in a rack so that the amount of air flow required for safe operation is
not compromised.
3. Mechanical Loading: Mount the equipment in the rack so that a hazardous condition does not occur due to
uneven mechanical loading (weight distribution/rack balance).
4. Circuit Overloading: consider the connection of the equipment to the supply circuit and the effect that
overloading of the circuits might have on overcurrent protection and supply wiring. Consider all equipment
nameplate ratings when addressing this concern.
5. Reliable Earthing: maintain reliable earthing of rack-mounted equipment; pay particular attention to supply
connections other than direct connections to the branch circuit (e.g., use of power strips).