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70 Posts in this encyclopedia categoryData transfer rate
Unit of measurement for the transmission speed of a data transfer. It is measured in bit/s or byte/s. (All data without guarantee)
Data transmission
Optical data transmission is always serial. Before data transmission, parallel data is always processed serially and then processed again in parallel after transmission (multiplexing and demultiplexing). This is also referred to as bit-serial data transmission, as all data is always transmitted as digital signals. (All information without guarantee)
DE 0100-520
Erection of low-voltage installations - Part 5: Selection and erection of electrical equipment - Chapter 52: Cables and wiring systems. (All information without guarantee)
DE 0627/ EC 48B/560/CD
Safety aspects, test programme for connectors and plug and socket devices. (All information without guarantee)
Degree of soiling
Contamination from the ambient conditions, combined with moisture, can affect the conductivity of operating materials or the insulation capacity of the surface. The degree of contamination has an influence on the component design via the creepage distance. Low degree of contamination: in air-conditioned or clean, dry rooms, such as computer systems. High degree of soiling: in open-air or outdoor areas, such as equipment on the roofs of locomotives or trams. The degree of soiling is used to categorise air and creepage distances. In industrial environments, the degree of contamination is typically 3 (below 1-4). (All data without guarantee)
DEL
Abbreviation for German electrolytic copper for conductive purposes. DEL is the stock exchange quotation for 99.5% pure copper in euros/100 kg. It is based on the reports of the highest and lowest premiums of the annual contracts by major copper processors and copper suppliers. The DEL quotation fluctuates daily. (All data without guarantee)
Density number
Ratio of the density of a body to the density of water (=1). Corresponds to the specific weight. (All data without guarantee)
Derating diagram
The diagram shows the permissible operating current that flows simultaneously and continuously through each contact element without exceeding the upper temperature limit. (All data without guarantee)
DeviceNet
Simple CAN-based communication system for networking industrial automation equipment (limit value transmitters, photo sensors, motor starters, frequency-controlled drives, operating terminals, etc.) with higher-level control equipment. Two twisted, shielded pairs of conductors within a cable serve as the transmission medium. One is used for communication (with transmission rates of 125 kbit/s, 250 kbit/s or 500 kbit/s for cable lengths of 500m, 250m or 100m) and the other for supplying power to the connected devices (maximum 8A at 24V DC voltage). Topology: trunk line with spur lines, maximum 64 participants. DeviceNet is mainly used in the USA and Asia. (All information without guarantee)
DHCP
Dynamic Host Configuration Protocol. Protocol for assigning temporary IP addresses from a defined range. The protocol automates and centralises the IP settings of individual participants in the network. If a participant in the network is to be integrated into a network or the Internet using the Internet protocol (TCP/IP), it requires various basic settings without which communication is not possible. This process can be carried out via a DHCP server without the involvement of the user, as this server recognises the settings and passes them on to the subscribers. Without a DHCP server, the user has to make the settings manually and re-enter them each time the network is changed. By using a DHCP server, this process is carried out automatically each time. (All information without guarantee)
Dielectric
Dielectric is the characteristic of certain substances to be electrically non-conductive - i.e. insulating. A dielectric is an electrically insulating material in which an external electric field (e.g. between the plates of a capacitor) creates an opposing field. A dielectric ensures that a static electric field is maintained even without a continuous supply of electric charge. (All information without guarantee)
Dimension
A term for the geometric sizes of a wire or strand as a diameter or cross-section. Often used together with the number of cores. The determination of dimensions is a mechanical test procedure in which the values specified in delivery specifications, norms and standards, such as wall thicknesses, thicknesses of insulating materials or diameters, are checked. This determines whether production has been carried out in accordance with the regulations. (All data without guarantee)
DIN 41 603-1
DIN 41 603-1 Connectors for printed circuits: Basic technical specifications, general requirements and guidelines for the preparation of design specifications and quality assessment. (All information without guarantee)
DIN 41 611
Solderless electrical connections; clamp connections; terms, requirements, tests. (All information without guarantee)
DIN 41 611-4
DIN 41 611-4 Solderless electrical connections; clamp connections; terms, requirements, tests. (All data without guarantee)
DIN 41 652
DIN 41 652: Connectors for slide-in technology, trapezoidal, round contacts ¨ 1 mm. (All data without guarantee)
DIN 46 230
DIN 46 230: Cable lugs for solderless connections, pin type, without insulating sleeve, for copper conductors. (All data without guarantee)
DIN 46 330
DIN 46 330: Short receptacles without insulating sleeve, for plug width 2.4 (All data without guarantee)
DIN EN 175301-801
Design specification: High-pole rectangular connectors with round interchangeable crimp contacts. (All data without guarantee)
DIN EN 50 173
DIN EN 50 173: Information technology - Application-neutral communication cable systems. (All data without guarantee)
DIN EN 60 204-1
DIN EN 60 204-1: Safety of machinery - Electrical equipment of machines - Part 1: General requirements. (All information without guarantee)
DIN EN 60 352-1
DIN EN 60 352-1: Solderless joints - Part 1: Wound joints; General requirements; Test methods and application notes. (All data without guarantee)
DIN EN 60 352-2
DIN EN 60 352-2: Solderless connections - Part 2: Crimp connections - General requirements, test methods and application notes. (All data without guarantee)
DIN EN 60 352-3
DIN EN 60 352-3: Solderless electrical connections - Part 3: General requirements, test methods and application notes. (All data without guarantee)
DIN EN 60 352-4
DIN EN 60 352-4: Solderless electrical connections - Part 4: General requirements, test methods and application notes. (All data without guarantee)
DIN EN 60 352-5
DIN EN 60 352-5: Solderless joints - Part 5: Press-fit joints - General requirements, test methods and application notes. (All data without guarantee)
DIN EN 60 352-7
DIN EN 60 352-7: Solderless joints - Part 7: Spring clamp joints - General requirements, test methods and application notes. (All data without guarantee)
DIN EN 60 603-13
DIN EN 60 603-13: Connectors for printed circuits for frequencies below 3 MHz - Part 13: Design specification for quality-rated indirect connectors for printed circuits with pitch 2.54 mm (0.1 in), with free connector for insulation displacement (ID) connection. (All specifications without guarantee)
DIN EN 60 603-7
DIN EN 60 603-7: Connectors for electronic equipment - Part 7: Design specification for unshielded free and fixed connectors, eight-pole (IEC 48B / 1746/ CDV:2007). (All data without guarantee)
DIN EN 60 999-1
DIN EN 60 999-1: Connecting devices - Electrical copper conductors; safety requirements for screw and screwless clamping points - Part 1: General requirements and special requirements for clamping points for conductors from 0.2 mm² up to and including 35 mm². (All data without guarantee)
DIN EN 60 999-2
DIN EN 60 999-2: Connecting devices - Electrical copper conductors - Safety requirements for screw and screwless clamping points - Part 2: Particular requirements for clamping points for conductors over 35 mm² up to and including 300 mm². (All data without guarantee)
DIN EN 60204-1
Safety of machinery -Electrical equipment of machines -Part 1: General requirements. (All information without guarantee)
DIN EN 60352-1
Solderless joints - Part 1: Wound joints; General requirements; Test methods and application notes. (All information without guarantee)
DIN EN 60352-7
Solderless connections - Part 7: Spring clamp connections. (All information without guarantee)
DIN EN 60603-13
Printed circuit connectors for frequencies below 3 MHz - Part 13: Design specification for quality rated indirect printed circuit connectors with 2,54 mm (0,1 in) pitch, with insulation displacement (ID) connector. (All specifications without guarantee)
DIN EN 61 984
DIN EN 61 984: Connectors - Safety requirements and tests. (All data without guarantee)
DIN EN 61984
Connectors - Safety requirements and tests. (All information without guarantee)
DIN EN ISO 9000
DIN EN ISO 9000 provides instructions for selecting the right quality management system for the company (DIN EN ISO 9001, 9002, 9003). (All information without guarantee)
DIN EN ISO 9001
This QM system is intended for companies with their own development and design, production, assembly and customer service. (All information without guarantee)
DIN EN ISO 9002
This set of rules applies as a verification level for companies whose main focus is production and which do not have their own design and development facilities. (All information without guarantee)
DIN EN ISO 9003
DIN EN ISO 9003 is applied in companies that only carry out production and its final inspection (final inspection). (All information without guarantee)
DIN EN ISO 9004
DIN EN ISO 9004 is a guideline for setting up a QM system for a company that is not yet certified. (All information without guarantee)
DIN ISO 857-2-03
DIN ISO 857-2-03: Welding and allied processes - Terms and definitions - Part 2: Soft soldering, brazing and related terms. (All specifications without guarantee)
DIN VDE 0100-410
DIN VDE 0100-410: Erection of low voltage installations - Part 4-41: Protective measures - Protection against electric shock. (All information without guarantee)
Direct current
Direct current is an electric current that, unlike alternating current, always flows in the same direction. It is mainly produced in generators and has advantages over three-phase current, such as better controllability of direct current motors and lower transmission losses. (All data without guarantee)
Direct current transformer
The direct current transformer is a system for converting direct current. This is done by connecting an inverter, transformer and rectifier in series, which convert direct current into alternating current, transform it and rectify it again. (All information without guarantee)
Direction of impact
The direction of rotation of the stranding cage of a stranding machine determines the direction of lay. A distinction is made between right-hand or Z lay, which corresponds to the right-hand thread of a screw, and left-hand or S lay, which corresponds to the left-hand thread of a screw. Stranding assemblies consisting of several layers of stranding usually have an alternating lay direction of the individual layers for better dimensional stability and flexibility. (All information without guarantee)
DKE
Abbreviation for German Commission for Electrical, Electronic & Information Technologies of DIN and VDE. The DKE is an organ of the German Institute for Standardisation (DIN) and its sponsor, the Association for Electrical, Electronic & Information Technologies (VDE). As a national organisation for the development of standards in electrical engineering and information technology, the DKE ensures important cross-sectional issues such as. Safety, EMC, components and performance from classic power networks and mobile communications to software and Internet protocols. The DKE is a German member of European and global standardisation organisations. The results of the standardisation work in the IEC, CELENEC and ETSI committees are translated into national standards and published by the DKE. (All information without guarantee)
Drum bar
This refers to the ability of wires to withstand constant unwinding and rewinding over long periods of time without damage. In the case of mobile power consumers (e.g. cranes), the length of cable required for the different working positions is carried on a reel. Constant winding and unwinding places high demands on the cable construction, so that only special cables are suitable for this. (All data without guarantee)