IEC 60950-23-2005 pdf – Information technology equipment – Safety – Part 23: Large data storage equipment.
1 Scope This part of IEC 60950 specifies requirements for information technology equipment (ITE) with self contained data storage systems that contain hazardous moving parts. These data storage systems are typically large enough to permit a person to enter completely, however, the systems also include similar large equipment permitting complete limb or head access to the area containing hazardous moving parts. These requirements are additional to the relevant requirements in IEC 60950-1. The maximum three dimensional reach of a cartridge accessory assembly typically has a minimum motion envelop of 0,75 m 3 or more. The equipments shall be installed in a RESTRICTED ACCESS LOCATION , such as a data centre. The exceptions for 2.1.3 and 4.5.4 noted in 18.104.22.168 of IEC 60950-1 do not apply to this Part 23. NOTE 1 An example of equipment covered by this scope is an automated information mass storage and retrieval system that uses integral hazardous moving parts for the handling of recorded media (for example, tape cartridges, tape cassettes, optical disks, etc.) and similar functions. This standard is not applicable to equipment with non-self-contained hazardous moving parts, such as robotic equipment installed in an industrial environment. NOTE 2 For standards related to robotic equipment in an industrial environment, see IEC 60204-1, IEC 60204-11 and ISO 10218. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60947-5-5:1997, Low-voltage switchgear and controlgear – Part 5-5: Control circuit devices and switching elements – Electrical emergency stop device with mechanical latching function IEC 60950-1:2005, Information technology equipment – Safety – Part 1: General requirements IEC 60073:2002, Basic and safety principles for man-machine interface, marking and identific
3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60950-1 and the following apply. NOTE Defined terms are printed in SMALL CAPS where they occur in the text. 3.1 work cell space within the equipment of such size that a person may completely or partially (for example, entire limb or head) enter and where mechanical hazards may be present NOTE A WORK CELL may contain more than one compartment. A compartment can be used for either operational or service purposes. 4 Protection of persons in the work cell During normal use, no hazards within the meaning of IEC 60950-1 shall be accessible at an outer ENCLOSURE of the equipment. The equipment shall be provided with safeguards to reduce the risk of injury due to hazardous moving parts in the WORK CELL . For protection against other hazards, the WORK CELL shall be treated as an OPERATOR ACCESS AREA . NOTE 1 Examples of safeguards include interlocks, barriers and awareness signals, together with designated procedures and training. NOTE 2 The design should take into account the fact that some authorities may require installation of fire detection and extinguishing systems in WORK CELLS . Access to a WORK CELL or any of its compartments shall be controlled by either of the following methods: − Method 1 – No key or TOOL is needed to gain entry to the WORK CELL . Interlocks meeting the requirements of 2.8 of IEC 60950-1 shall be provided to prevent access to the WORK CELL while power is available to the hazardous moving parts in that compartment. Power to the moving parts shall not be restored until the doors are closed and latched. − Method 2 – A key or TOOL shall be used to gain and control access to the WORK CELL , and access to the WORK CELL shall be prevented while power is available to the hazardous moving parts in that compartment. The operating and servicing instructions, as appropriate, shall specify that the key or TOOL must be carried by the person while in the WORK CELL .