Reference Guide

Unmanaged Switches System Information Guide 13
Information Technology Equipment (ITE), including peripherals,
expansion cards, printers, input/output (I/O) devices, monitors, and so on,
that are integrated into or connected to the system should match the
electromagnetic environment classification of the computer system.
A Notice About Shielded Signal Cables: Use only shielded cables for
connecting peripherals to any Dell device to reduce the possibility of
interference with radio communications services. Using shielded cables
ensures that you maintain the appropriate EMC classification for the
intended environment. For parallel printers, a cable is available from Dell.
If you prefer, you can order a cable from Dell on the World Wide Web at
accessories.us.dell.com/sna/category.asp?category_id=4117.
Most Dell computer systems are classified for Class B environments.
However, the inclusion of certain options can change the rating of some
configurations to Class A. To determine the electromagnetic classification
for your system or device, refer to the following sections specific for each
regulatory agency. Each section provides country-specific EMC/EMI or
product safety information.
CE Notice (European Union)
Marking by the symbol indicates compliance of this Dell computer to
the EMC Directive and the Low Voltage Directive of the European Union.
Such marking is indicative that this Dell system meets the following
technical standards:
Set 1: For standard Dell ITE with AC power supplies
• EN 55022 — "Information Technology Equipment — Radio
Disturbance Characteristics — Limits and Methods of Measurement."
• EN 55024 — "Information Technology Equipment - Immunity
Characteristics - Limits and Methods of Measurement."
• EN 61000-3-2 — "Electromagnetic Compatibility (EMC) - Part 3:
Limits - Section 2: Limits for Harmonic Current Emissions
(Equipment Input Current Up to and Including 16 A Per Phase)."
• EN 61000-3-3 — "Electromagnetic Compatibility (EMC) - Part 3:
Limits - Section 3: Limitation of Voltage Fluctuations and Flicker in
Low-Voltage Supply Systems for Equipment With Rated Current Up
to and Including 16 A."
• EN 60950 — "Safety of Information Technology Equipment."