4. General Safety Instructions for IT Equipment
VRack 4U – User's Guide (prelim. version V0.99)
Additional safety instructions for DC power supply circuits
To guarantee safe operation of devices with DC power supply voltages larger than 60 volts DC or a power consumption
larger than 240 VA, please observe that:
the device is set up, installed and operated in a room or enclosure marked with “RESTRICTED ACCESS”, if there are
no safety messages on VRack 4U system as safety signs and labels on the device itself.
no cables or parts without insulation in electrical circuits with dangerous voltage or power should be touched
directly or indirectly
a reliable protective earthing connection is provided
a suitable, easily accessible disconnecting device is used in the application (e.g. overcurrent protective device), if
the device itself is not disconnect able
a disconnect device, if provided in or as part of the equipment, shall disconnect both poles simultaneously
interconnecting power circuits of different devices causes no electrical hazards
A sufficient dimensioning of the power cable wires must be selected – according to the maximum electrical
specifications on the type label as stipulated by EN60950-1 or VDE0100 or EN60204 or UL508 regulations.
The devices do not generally fulfill the requirements for "centralized DC power systems“ (UL 60950-1, Annex NAB; D2)
and therefore may not be connected to such devices!
4.1.
Operation of Laser Source Devices
Fig. 1: Laser radiation warning label
The optional DVD drives contain light-emitting diodes (classified in accordance with IEC 825-1:1993, EN 60825:1997:
LASER CLASS 1 and therefore must not be opened.
If the enclosure of such a drive is opened, invisible laser radiation is emitted. Do not allow yourself to be exposed to this
radiation.
The laser system meets the code of Federal Regulations 21 CFR, 1040 for the USA and the Canadian Radiation Emitting
Devices Act, REDR C 1370.
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