This standard specifies interchange and arithmetic formats and methods for binary and decimal floating-point arithmetic in computer programming environments. This standard specifies exception conditions and their default handling. An implementation of a floating-point system conforming to this standard may be realized entirely in software, entirely in hardware, or in any combination of software and hardware. For operations specified in the normative part of this standard, numerical results and e...view more

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      74 pages
      English language

This document specifies the Cooling Efficiency Ratio (CER) as a Key Performance Indicator (KPI) to quantify the efficient use of energy to control the temperature of the spaces within the data centre. This document: a) defines the Cooling Efficiency Ratio (CER) of a data centre; b) describes the relationship of this KPI to a data centre’s infrastructure, information technology equipment and information technology operations; c) defines the measurement, the calculation and the reporting of the pa...view more

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      18 pages
      English language
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This document is a compilation of recommended practices for improving the environmental sustainability of both new and existing data centres. Environmental impacts consider not just those associated with electricity but also water usage and other pollutants.
It is recognized that the practices included are not universally applicable to all scales and business models of data centres or be undertaken by all parties involved in data centre operation, ownership or use.

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    • Technical report
      23 pages
      English language
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This document is a compilation of recommended Practices for improving the energy management (i.e. reduction of energy consumption and/or increases in energy efficiency) of data centres. It is historically aligned with the EU Code of Conduct for Data Centre Energy Efficiency (CoC) scheme operated by the Directorate-General Joint Research Centre (DG JRC) of the European Commission (EC). It is recognized that the Practices included might not be universally applicable to all scales and business mode...view more

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    • Technical report
      47 pages
      English language
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This document is a compilation of recommended practices for improving the environmental sustainability of both new and existing data centres. Environmental impacts consider not just those associated with electricity but also water usage and other pollutants. It is recognized that the practices included are not universally applicable to all scales and business models of data centres or be undertaken by all parties involved in data centre operation, ownership or use.

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    • Technical report
      23 pages
      English language
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This European Standard: a) details the issues to be addressed in a business risk and operating cost analysis enabling application of an appropriate classification of the data centre; b) defines the common aspects of data centres including terminology, parameters and reference models (functional elements and their accommodation) addressing both the size and complexity of their intended purpose; c) describes general aspects of the facilities and infrastructures required to support effective operat...view more

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      31 pages
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This European Standard addresses environmental control within data centres based upon the criteria and classifications for "availability", "security" and "energy efficiency enablement" within EN 50600 1

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      29 pages
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This Amendment will update EN 50600-4-3 requirements to re-align with the recent findings of JTC 1/SC 39 on this KPI.

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      5 pages
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This Amendment will update EN 50600-4-2 requirements to re-align with the recent findings of JTC 1/SC 39 on this KPI.

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      7 pages
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This document offers users additional information on the background of the requirements and recommendations in the EN 50600 series. In addition it constitutes a guideline for the correct application and interpretation of these standards.

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      28 pages
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IEC 62899-303-1:2018(E) defines standard mechanical dimensions (especially related to the web size) of equipment for printed electronics. This document covers web-based printing equipment, but it can be used for sheet-based products.

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    • Standard
      9 pages
      English language

This European Standard provides methods to determine, by means of tests, measurements and/or calculations:
-   The energy consumption of desktop computers, integrated desktop computers and notebook computers in OFF mode, with Wake-on-LAN (when available) enabled and disabled;
-   The energy consumption of desktop computers, integrated desktop computers and notebook computers in other modes of operation, including low power state(s);
-   The lowest power state of desktop computers, integrated deskt...
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This European Standard provides methods to determine, by means of tests, measurements and/or calculations: - The energy consumption of desktop computers, integrated desktop computers and notebook computers in OFF mode, with Wake-on-LAN (when available) enabled and disabled; - The energy consumption of desktop computers, integrated desktop computers and notebook computers in other modes of operation, including low power state(s); - The lowest power state of desktop computers, integrated desktop c...view more

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      28 pages
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This European Standard specifies the following for the other standards in the EN 50600 4-X series: a) a common structure, b) definitions, terminology and boundary conditions for KPIs of data centre resource usage effectiveness and efficiency, c) common requirements for KPIs of data centre resource usage effectiveness and efficiency, d) common objectives for KPIs of the data centre resource effectiveness and efficiency, e) general information regarding the use of KPIs of data centre resource usag...view more

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      15 pages
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This European Standard: a) defines the Renewable Energy Factor (REF) of a data centre; b) specifies a methodology to calculate and to present the REF; c) provides information on the correct interpretation of the REF.

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    • Standard
      19 pages
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This European Standard specifies the Power Usage Effectiveness (PUE) as a Key Performance Indicator (KPI) to quantify the efficient use of energy in the form of electricity. NOTE See the Note 1 to entry in Definition 3.1.3. This European Standard: a) defines the Power Usage Effectiveness (PUE) of a data centre; b) introduces PUE measurement categories; c) describes the relationship of this KPI to a data centre’s infrastructure, information technology equipment and information technology operatio...view more

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      34 pages
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IEC TR 62921:2016(E) provides specific guidance for the use of streamlining techniques that minimize cost and resources needed to complete greenhouse gas emissions quantifications. In addition, the product category rules (PCR) section of this Technical Report recommends "state-of-the-art" process and data assumptions in order to reduce uncertainty. Lastly, this Technical Report provides an example of how a calculation could be performed.

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    • Technical report
      51 pages
      English language

This European Standard specifies processes for the management and operation of data centres. The primary focus of this standard is the operational processes necessary to deliver the expected level of resilience, availability, risk management, risk mitigation, capacity planning, security and energy efficiency. The secondary focus is on management processes to align the actual and future demands of users. Figure 2 shows an overview of related processes. The transition from planning and building to...view more

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      47 pages
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This European Standard addresses the physical security of data centres based upon the criteria and classifications for "availability", "security" and "energy efficiency enablement" within EN 50600-1. This European Standard provides designations for the data centres spaces defined in EN 50600-1. This European Standard specifies requirements and recommendations for those data centre spaces, and the systems employed within those spaces, in relation to protection against: a) unauthorized access addr...view more

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      38 pages
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ISO 9295:2015 specifies four methods for the determination of the sound power levels of high-frequency noise emitted by machinery and equipment in the frequency range covered by the octave band centred at 16 kHz, which includes frequencies between 11,2 kHz and 22,4 kHz. They are complementary to the methods described in ISO 3741 and ISO 3744. The first three methods are based on the reverberation test room technique. The fourth method makes use of a free field over a reflecting plane.
The test ...
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      27 pages
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This European Standard addresses the wide range of telecommunications cabling infrastructures within data centres based upon the criteria and classifications for availability within EN 50600-1. This European Standard specifies requirements and recommendations for the following: a) information technology and network telecommunications cabling (e.g. SAN and LAN); b) general information technology cabling to support the operation of the data centre; c) telecommunications cabling to monitor and cont...view more

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    • Standard
      36 pages
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This European Standard addresses environmental control within data centres based upon the criteria and classifications for “availability”, “security” and “energy efficiency enablement” within EN 50600 1. This European Standard specifies requirements and recommendations for the following: a) temperature control, b) fluid movement control, c) relative humidity control, d) particulate control, e) vibration, f) floor layout and equipment locations, g) energy saving practices, h) physical security of...view more

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    • Standard
      27 pages
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This International Standard covers personal computing products. It applies to desktop and notebook computers as defined in 4.1 that are marketed as final products and that are hereafter referred to as the equipment under test (EUT) or product. This standard specifies: - a test procedure to enable the measurement of the power and/or energy consumption in each of the EUT's power modes; - formulas for calculating the typical energy consumption (TEC) for a given period (normally annual); - a majorit...view more

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      48 pages
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IEC 62623:2012 covers personal computing products. It applies to desktop and notebook computers as defined in 4.1 that are marketed as final products and that are hereafter referred to as the equipment under test (EUT) or product. This standard specifies: - a test procedure to enable the measurement of the power and/or energy consumption in each of the EUT's power modes; - formulas for calculating the typical energy consumption (TEC) for a given period (normally annual); - a majority profile tha...view more

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    • Standard
      48 pages
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This European Standard: a) details the issues to be addressed in a business risk and operating cost analysis enabling application of an appropriate classification of the data centre, b) defines the common aspects of data centres including terminology, parameters and reference models (functional elements and their accommodation) addressing both the size and complexity of their intended purpose, c) describes general aspects of the facilities and infrastructures required to support effective operat...view more

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    • Standard
      27 pages
      English language
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IEC 62623:2012 covers personal computing products. It applies to desktop and notebook computers as defined in 4.1 that are marketed as final products and that are hereafter referred to as the equipment under test (EUT) or product. This standard specifies:
- a test procedure to enable the measurement of the power and/or energy consumption in each of the EUT's power modes;
- formulas for calculating the typical energy consumption (TEC) for a given period (normally annual);
- a majority profile ...
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    • Standard
      93 pages
      English and French language

IEC 60904-5:2011 describes the preferred method for determining the equivalent cell temperature (ECT) of PV devices (cells, modules and arrays of one type of module), for the purposes of comparing their thermal characteristics, determining NOCT (nominal operating cell temperature) and translating measured I-V characteristics to other temperatures. The main technical changes with regard to the previous edition are as follows:
- added method on how to extract the input parameters;
- rewritten me...
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    • Standard
      20 pages
      English and French language

IEC/TR 61838:2009 provides a survey of some of the methods by which probabilistic risk assessment results can be used to establish "risk-based" classification criteria, so as to allow FSEs to be placed within the four categories established within IEC 61226. The safety principles and the usefulness of a risk-based approach to classification are discussed and a description of four different approaches is presented. The main technical changes in this second edition with regard to the previous edit...view more

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    • Technical report
      123 pages
      English and French language

This document is a compilation of recommended Practices for improving the energy management (i.e. reduction of energy consumption and/or increases in energy efficiency) of data centres. It is historically aligned with the EU Code of Conduct for Data Centre Energy Efficiency (CoC) scheme operated by the Directorate-General Joint Research Centre (DG JRC) of the European Commission (EC). It is recognized that the Practices included might not be universally applicable to all scales and business mode...view more

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    • Technical report
      50 pages
      English language
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This document: a) specifies the Energy Reuse Factor (ERF) as a KPI to quantify the reuse of the energy consumed in the data centre; b) defines the measurement, the calculation and the reporting of ERF; c) describes the application of ERF and its discrimination from Power Usage Effectiveness (PUE). The ERF does reflect the efficiency of the reuse process, which is not part of the data centre.

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    • Standard
      21 pages
      English language
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This part of IEC 61606 specifies the basic measurement methods of a linear PCM signal for an audio part of personal computers (PCs) and applies to both desktop and portable computers. The common measuring conditions and methods are described in IEC 61606-1. Specific conditions and methods of measurement for PCs are given in this standard.

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    • Standard
      34 pages
      English language
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This International Standard specifies performance characteristics and calibration methods for digital data acquisition systems and relevant software to ensure that all measurement systems relying on DAQ devices meet a common standard. This standard covers: - the minimum specifications that the DAQ device manufacturer must provide to describe the performance of the analogue-to-digital module (ADM) of the DAQ device; - standard test strategies to verify the minimum set of specifications; - the min...view more

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      50 pages
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This document defines the cabling specifications for an onboard data transmission bus between the different parts of equipment for service operations and monitoring of the fleet.
This document is applicable to equipment installed onboard buses, trolley buses and tramways only as part of a bus fleet operation. This equipment include operations aid systems, automatic passenger information systems, fare collection systems, etc.
Equipment directly related to the functioning of the vehicle (e.g. dr...
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      17 pages
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The present document specifies the choice and the general application's rules of an onboard data transmission bus between the different equipment for service operations and monitoring of the fleet. This applies to equipment installed onboard buses, trolleybuses and tramways only as part of a bus fleet operation. It excludes tramways when they are operated as part of a train, subway or metro operation. The equipment includes operations aid systems, automatic passenger information systems, fare co...view more

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    • Standard
      76 pages
      English language
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The VMEbus specification defines an interfacing system used to interconnect microprocessors, data storage and peripheral control devices in a closely-coupled hardware configuration. Its objectives include allowing communication between devices on the VMEbus without disturbing the internal activities of other devices on the VMEbus, allowing a broad range of design latitude so that the designer can optimize cost and/or performance without affecting system compatibility, and providing a system wher...view more

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    • Standard
      262 pages
      English language

The VMEbus specification defines an interfacing system used to interconnect microprocessors, data storage, and peripheral control devices in a closely coupled hardware configuration. The system has been conceived with the following objectives: a) to allow communication between devices on the VMEbus without disturbing the internal activities of other devices interfaced to the VMEbus; b) to specify the electrical and mechanical system characteristics required to design devices that will reliably a...view more

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      262 pages
      English language

The scalable coherent interface (SCI) provides computer-bus-like services but, instead of a bus, uses a collection of fast point-to-point unidirectional links to provide the far higher throughput needed for high-performance multiprocessor systems. SCI supports distributed, shared memory with optional cache coherence for tightly coupled systems, and message-passing for loosely coupled systems. Initial SCI links are defined at 1 Gbyte/s (16-bit parallel) and 1 Gb/s (serial). For applications requi...view more

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    • Standard
      272 pages
      English language

This International Standard applies to physical connectors and cables, electrical properties, and logical protocols for point-to-point serial scalable interconnect, operating at speeds of 10 Mbit/s to 200 Mbit/s and at 1 Gbit/s in copper and optic technologies (as developed in Open Microprocessor Systems Initiative/Heterogeneous InterConnect Project (OMI/HIC)). The object of this International Standard is to enable high-performance, scalable, modular, parallel systems to be constructed with low ...view more

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    • Standard
      162 pages
      English language

The construction of high-performance systems with parallel communications, parallel processing, and/or parallel I/O demands a fast, low-cost, low-latency interconnect. It must be fast and low-latency, otherwise it will be the limiting factor in system performance; and it must be low-cost, or it will dominate the system cost. This standard has been developed to complement recent technical developments of highly integrated, low-power interconnect technology implemented in high-volume commodity VLS...view more

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    • Standard
      162 pages
      English language

SBus is a high performance computer I/O interface for connecting integrated circuits and SBus Cards to a computer system motherboard. This standard defines the mechanical, electrical, environmental, and protocol requirements for the design of SBus Cards and the computer system motherboard that supports those cards. Every SBus Card shall implement appropriate self-descriptive and initialization firmware using FCode, which is similar to the Forth programming language. The details of this firmware ...view more

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    • Standard
      103 pages
      English language

An input/output expansion bus with a 32- or 64-bit width is described in this standard. The SBus is designed for systems requiring a small number expansion ports. SBus Cards may be connected to a standard Sbus Connector mounted on the motherboard. SBus Devices may also be attached to the SBus directly on the system's motherboard. The dimensions of the SBus Card are 83,8 mm by 146,7 mm, making the cards appropriate for small computer systems that make extensive use of highly integrated circuits. ...view more

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    • Standard
      103 pages
      English language

This International Standard specifies the logical specifications of STbus which is a high-performance and highly reliable system bus. STbus adopts a synchronous transfer method with a high-speed clock and a split transfer method enabling to minimize bus holding time during one bus operation and to use a bus efficiently. This International Standard is applicable to a high-performance system bus or an I/O bus in a multiprocessor system. Typical STbus applications are a system bus and an I/O bus in...view more

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    • Standard
      81 pages
      English language

This International Standard specifies the logical specifications of STbus which is a highperformance and highly reliable system bus. STbus adopts a synchronous transfer method with a high-speed clock and a split transfer method enabling to minimize bus holding time during one bus operation and to use a bus efficiently. The contents given in this specifications are as follows: a) System bus interface signal provisions; b) Bus operations and transfer protocol for each bus operation; c) Copyback ca...view more

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    • Standard
      81 pages
      English language

This first edition describes the elements of the system bus.  Applies to interface system components intended for data  processing, data storage, and peripheral control devices.

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    • Standardization document
      59 pages
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