RAFI LEXICON

TERMS FROM THE WORLD OF DATA INPUT

Here are explanations and more information about our products and procedures, listed in alphabetical order, as well as industry-specific abbreviations, standards and dimensions. If you would like to search for a specific term, you can do so very easily using our term search facility.

1

16,2 mm

Mounting hole acc. to IEC 60947-5-1

2

22,3 mm

Mounting hole acc. to IEC 60947-5-1

2-Shot moulding

Using this procedure the symbol is separately moulded. Then the appropriate keycap form is moulded around it. Advantage: The character becomes an integrated part of the keycap.

3

30,5 mm

Mounting hole acc. to IEC 60947-5-1

9

9,2 mm

A RAFI-specific mounting dimension. With a mounting depth of 9.2 mm behind the front panel surface, the installed printed circuit board can hold RAFI components such as MICON 5, RACON 8, RACON 12, KN 19, RF 15, RF 19 and RAFIX 22 FS contact blocks. 

A

AIAG

Automotive Industry Action Group (an American automobile industry association): organised by the car manufacturers Ford, DaimlerChrysler and GM and which deals with the development of uniform standards, forms and expectations placed on suppliers.

AOI

Automatic Optical Inspection

AP

Advanced Purchasing: Purchasing organisation that handles incoming purchases prior to the start of a production series.

APQP

Advanced Product Quality Planning (and Control Plan):Product quality preliminary planning and control planning. This is part of the quality assurance measures required in QS-9000.

AQE

Advanced Quality Engineer: Supplier quality assurance associate responsible for maintaining supplier quality and for the supplier processes which ensure it.

ASL

Approved Supplier List: An approved supplier list (ASL) is the list of approved suppliers for a company. Included in this list are suppliers who have been examined by the Purchasing department or Supplier Management according to various criteria, and who have met specific standards with regard to quality, delivery capacity and delivery times, as well as cost-effectiveness. Inclusion in the ASL of a globally recognised company can be an indication that the supplier can compete with other qualified candidates.

AVSQ

ANFIA Valuatione Sistemi Qualità: A quality management system by the Italian automobile industry, comparable to QS-9000 and currently a part of ISO/TS 16949. (ital.: Associazione nazionale dei Valutatori di Sistemi Qualita)

AWG – American Wire Gauge

A unit of measurement for thickness and diameter of solid and stranded wires

Actuator

The component which is pressed by the operator. Actuators are always located on the surface of a machine.

Ambient temperatur

Minimum and maximum permissible temperature (°C) in the environment of the component

Assembly without tools

An assembly process performed without any auxiliary items

B

Bezel

The part of a pushbutton that is directly touched by an operator. Bezels also convey the meaning of the input through various identifying colours.

Blanking cap

A non-functional cover on mounting holes

Blister reel

A deep-drawn endless packaging type with a transparent cover strip used for automatic feeding of components to automatic SMT assembly machines

Buzzer

A signalling unit generating an acoustic signal (piezo type) <div></div>

Breakdown voltage

The voltage (V, kV) that is necessary to cause current to flow through an insulator.

Barred area

The area around a PCB component where no other components are allowed

C

CCC

The CCC certificate (China Compulsory Certificate) is the compulsory Chinese certificate for various product groups, in particular for electrical engineered products. The products, which are required to be certified, may only be imported to China and sold there after a CCC certification of the product has been performed.

CE mark

Identification for devices that meet the European low-voltage directive. The CE mark indicates that the device identified meets all pertinent requirements and regulations. See also table in the glossary pg. 6–12.

Click quick fastener

For attaching pushbuttons to the front side (LUMOTAST FK, LUMOTAST 25)

CSA

Canadian Standard Association

CSA„NRTL/C“

Approval label for Canada and the U.S.A., tested by CSA acc. to CSA C 22.2 14-M91 and UL 508

CURus

Approval label for the U.S.A. and Canada, tested by UL acc. to UL 508 and CSA C22.2 14-M91

Control component

Components designed to input commands on a machine. Control components have a modular design. They consist of an actuator and switching element, and therefore offer maximum flexibility with regard to the selection of the suitable input components.

Collar

The housing of an actuator

Collar shape

<br /> Can be designed in various types, common collar shapes are round or square

Code colours according to IEC/EN 60073, IEC 60204 (VDE 0113 Teil1)

red – Emergency (warning of possible danger; immediate action required) yellow – abnormal (critical state) green – normal (indicates safe operating states) blue – urgent (action required) white – no special importance grey – no special importance black – no special importance (see also table pg. 6–10 ff)

Contacts

Contacts are distinguished according to static and separable contacts. Static contacts include temporary or permanent connections (screw connections, solder connections, etc.). Separable contacts are referred to as switching contacts in circuits.

Contact resistance

The resistance between closed contacts (constriction resistance, surface contamination resistance, etc.)

Conventional thermal current Ith EN IEC 60947-5-1

The maximum current (A) that a switching device can conduct without thermal overload for at least 8 hours

Creepage distance EN IEC 60947-1, IEC EN 61058

Describes the shortest distance (mm) between two conductive parts on the surface of an insulating material

Contact chamber

The enclosed space around a switching contact

Change-over contact

Mechanically-connected normally open and normally closed contact with a common potential

D

DFMEA

Design Failure Modes and Effects Analysis: Design FMEA, used to identify possible errors at the component level which are directly associated with the design (determination of product features).

Double gap

A contact type with two points of switch contact separation

Declarations of conformity

We have declarations of conformity for all affected products and they can be requested if necessary. Please provide the exact order number for the product in question in your inquiry.

Degree of protection

See table in the glossary pg. 6–14

Diffuser Lens

Instep of a lens that diffuses a light signal in different directions. Diffuser lenses are used in signal lamps for visual recognition from a distance and cannot be labelled.

Dupe-proof

Are emergency stop switches according to EN 60947-5-5. Dupe-proof means that the initiation of a component cannot be cancelled as soon as a certain point is reached when operated by an accumulated force.

Degree of contamination DIN EN 60947-1

A measure for the quantity of conductive or hygroscopic dust, gas or salt and the relative humidity which may cause a reduction of the dielectric strength of a switching device. The degree of contamination is described with four different levels for the definition of the ambient conditions. Degree of contamination 2: Domestic appliances, Degree of contamination 3: Industry, Degree of contamination 4: Outdoor use

E

Electrical operating life

The number of operations of a component at a defined electrical load

EMS

Electronic manufacturing services (contract manufacturing of electrical assemblies)

EMV / EMVG

EMV = = Electromagnetic compatibility: The components listed in this catalogue are “elementary components such as switches, signal lamps and the like” and according to the Law on Electromagnetic Compatibility (= EMVG [German]), and therefore do not fall under the scope of the EMVG.

ENEC approval

European approval label for device switches according to IEC 61058-1. This European approval replaces all national approval labels in Europe, such as VDE, SEV, ÖVE, DEMKO, SEMKO, NEMKO, FEMKO and KEMA. Many RAFI products have already obtained approval according to the new approval procedure while others are under preparation. Explanation of the ENEC ratings – Example: 25T85 (70) means: - Lower temperature: - 25°C - Upper temperature: + 85°C (without lamp) - Upper temperature: + 70°C (with lamp)

Error Proofing

Poka Yoke/ error prevention: System (method) for preventing errors and immediately uncovering inadvertent errors. The expression Poka Yoke is translated to mean: Poka: random, inadvertent errors and Yoke: avoiding, preventing, hence in its entirety: avoiding random errors – Error Proofing is the English expression for Poka Yoke, sometimes the expression Mistake Proofing is also used. Translated, the expression means error avoidance.

ESD strength

The dielectric strength (kV) of a component with static charge

Engraving

This labour-intensive procedure involves engraving the desired symbol into the keycap and colouring it. Suitable only for small quantities.

Electric Arc

A self-sustaining discharge phenomenon between two electrodes

Emergency stop

Emergency stop switches (EN 60947-5-5) are safety-related actuators with a mechanical latching function. Emergency stop switches can be used for emergency stop functions according to IEC EN 13850 and in the process trigger various stopping categories (depending on the safety application). The following criteria apply according to the EC Machinery Directive: - An emergency stop switch must be ready to use at any time. - One actuation must result in immediate disconnection (shutdown). - Resetting an emergency stop switch must not initiate restarting. - The switching device must latch when pressed. - There must be unambiguous identification (red/yellow). The original operating instructions can be found on pages 6–16f

Extension plunger

An accessory for short-travel keyswitches used for adapting the actuating area to obtain different widths and heights.

F

Flat quick-connect terminals

Static contact point for connecting components to cable lugs (cable)

Flammability class

Specifies the flammability of a product. For details, refer to table in the glossary pg. 6–12

FMEA

Failure Mode and Effects Analysis: In the FMEA, the point is to uncover potential failures as early as possible in the development process in order to obtain as rugged a design as possible.

Front ring

Design element of &nbsp;RAFIX 22 FS+ and RAFIX 22 QR control components

Flush-mounted housings

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB">Control components with a housing collar that is square-alignable such that a control panel can be arranged with no gaps. There is no clearance between the housings of the various actuators. This prevents accumulation of dirt.</span>

Fixing nut

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB"><span style="font-family: Verdana, sans-serif; font-size: 12px; ">Used for fixing the device in the front plate</span></span>

Fixing spanner

Assembly tool for optimum component assembly

Filament lamp

A lamp whose light is generated by a hot filament wire. The wire is enclosed in a vacuum in order to prevent it from burning.

Full-travel keyswitch

An electromechanical keyswitch with a travel from 1 to 5 mm optimised for quick data input

G

Glow wire test according to IEC 60695-2

The test temperature of 850°C means that these products can be used in devices designed for unattended continuous operation.

Gold contact

Contacts used for switching low currents and voltages (signal level)

Gullwing terminals

Solder terminals bent towards the outside, used for SMT components

Grid spacing

Defines the distance to the next adjacent component of the same type

H

Hall-Technologie

The Hall effect occurs in a current-carrying conductor located within a magnetic field, where an electrical field builds up which is perpendicular to the direction of current and to the magnetic field and which compensates the Lorentz force acting on the electrons. The Hall effect can be utilised for switching and positioning purposes. The switching method of the RS 76C is based on this technology.

Hot stamping

Often referred to as foil stamping, transmits preprint pictures onto the synthetic material to be decorated using pressure and heat.

HMI

Human Machine Interface&nbsp;

Handle

The part of a selector switch used for turning and operating the switch

I

ICT

In-Circuit Test

IEC 60947-5-1

Low-voltage switching devices. Part 5-1: Control devices and switching elements, electromechanical control devices, DIN EN 60947-5-1, VDE 0660, Part 200

IEC 60947-5-5

Low-voltage switching devices. Part 5-5: Control devices and switching elements, electrical emergency stop device with mechanical latching function, DIN EN 60947-5-5, VDE 0660, Part 210

IEC 60204-1

Electrical equipment of machines. Part 1: General requirements: DIN EN 60204-1, VDE 0113, Part 1

IEC 60529

Degrees of protection by housings: DIN EN 60529, VDE 0470, Part 1

IEC 61058-1

Device switches. Part 1: General requirements: DIN EN 61058-1, VDE 0630, Part 1

ISO/TS 16949

International Standard Organisation/ Technical Specification No 16949: A technical specification that in connection with ISO 9001:1994 describes the quality system requirements on automobile suppliers. ISO/TS 16949 was created by the International Automotive Task Force (IATF) for all worldwide participating OEMs. It is a precursor to a future standard, the so-called Technical Specification.

Insulation resistance IEC 60093

The resistance (kΩ, MΩ) between different poles of an electromechanical contact and live parts

Illumination

Used for visual signal indication with illuminated pushbuttons, indicator lights, signal lamps, pushbuttons, etc. The illumination can be implemented with various luminous elements mounted either in sockets or permanently.

Intrinsic resistance

A resistance value (in mΩ) between two contact terminals when the circuit is closed

Illuminated pushbutton

A pushbutton which can be illuminated for visual signal indication

Indicator field

Components for visual signalling to display states of integrated PCB keyswitches (RG 85 III, RF)

Indicator light

A signal lamp indicating a status by lighting up or extinguishing

J

J-lead

Solder terminals bent towards the inside, used for SMT components

JEDEC

Abbreviation of Joint Electron Device Engineering Council. The JEDEC Solid State Technology Association (in short, JEDEC) is a US organisation for the standardisation of semiconductors. One of its fields of activity is the definition of binding standards for soldering (example: JEDEC 20D soldering standard with RoHS conformity).

JiT

Just in Time

K

KN 19

Short-travel mains switch for low-profile data entry systems, overall height of RAFI KN 19: 9.2 mm

KPC

Key Product Characteristic: A key product characteristic is a special identification of a feature entered in the drawing. For example, it can be dimensional information or material information as well as a corresponding purity class (residual contamination definition). More detailed information on the features used sometimes differ very widely depending on the OEM. (Most can be found in i-Qpedio as abbreviations)

Keylock switch

A switching element provided with a priority function, where the key is used as the actuator. For its keylock switches, RAFI only uses key cylinders from reputed keylock system manufacturers. Keylock switches are open mechanical systems that can require operator maintenance depending on the ambient conditions. We rely on our suppliers to define what constitutes appropriate service.

Keycap

Visible actuating area of a key which is removeable, legendable, opqaque, translucent or transparent

Keyswitch

A signal-generating switching element closing (or opening) a circuit when operated. The circuit opens (or closes) again after it is operated again.

L

Lamp

A luminous element with artificial light used for illumination

Lamp socket

An element which can accommodate a standard luminous element with a specific base

Laser engraving

A recommended legending technique for use when complete keyboards are needed with different layouts, for example. The legending program is issued by RAFI here. The keyboards can then be legended in short order on request. This type of legending is also suitable for medium to large quantities.

LCR

Lean Capacity Rate: The required daily output of a process.

LED

A light emitting diode, for example used for indicating a signal status. LEDs can be operated either with direct current (DC) or with alternating current (AC).

LED-Clip

A special LED-type luminous element for RAFIX 22 FS control components when switching elements are used with a quick-connect terminal

Luminous element

A term designating electric components emitting light

LUMOTAST

A brand name for RAFI keyswitch series, which have been offered as mono-elements for over 35 years. The current LUMOTAST series include: LUMOTAST FK, LUMOTAST 22, LUMOTAST 25, LUMOTAST 75

LUMOTAST FK

An illuminated pushbutton and signal lamp product series suitable for mounting to the front side and provided with a ribbon cable terminal

LUMOTAST 22

An emergency stop button suitable for mounting to the front side

LUMOTAST 25

An illuminated pushbutton and signal lamp series suitable for mounting to the front side, with a collar dimension of 25 x 25 mm and a ribbon cable terminal

LUMOTAST 75

An illuminated pushbutton and signal lamp series suitable for mounting to the front side for applications up to 250 V

Legending

Required to identify the effects of the specific input or output signal. Legending technologies used by RAFI :&nbsp;- Engraving - Hot stamping - Pad printing - 2-Shot moulding - Laser engraving - etc.

Latching

The contact remains in the switched position when operated once

Latching function

The contact remains in the switched position when operated once

Label holder

Legend label modules which can be mounted separately for control components of the RAFIX 16 and RAFIX 22 QR series

Legend insert

When using keycaps with an exchangeable legend insert (e.g. RAFIX 22 FLEX-LAB), it is possible to print or engrave the legend insert. Since these inserts are protected by the bezel, they cannot wear out.

Locating pip

A projection provided for locating an actuator. Panel cut-outs complying with IEC 60 947-5-1 are provided with the matching groove, or indent.

M

Materials

See plastic materials

Mechanical operating life

Number of mechanical operations of a component

Mono-element

Complete element consisting of actuator and switching element

Mounting hole

A round or square cut-out in the front plate used for installing RAFI components. Mounting holes may be standardised, e.g. according to EN 60 947-5-1.

Mounting depth

The space required for RAFI components behind the front plate. The mounting depth always includes the front plate thickness, which may vary.

Make current

The current flowing immediately after initial power-on and which may be a multiple of the rated current flowing later.

Markings

Markings are made according to low-voltage directive 72/33/EWG and the directive;CE marking 93/68/EWG ; in the delivery documents, on the package or on the product.

Mushroom pushbutton

A pushbutton with an enlarged actuating area

Mushroom head

The actuating area of a mushroom pushbutton

Make/break arc

An arc caused when making and breaking a contact, having a detrimental effect on the electrical operating life

Momentary contact function

Signal transfer only when actuated – circuit is closed or open as long as the actuation persists

N

Neon lamp

A lamp whose light is generated by electrical discharge effects in thinned gas. Such lamps offer the advantages of low heat loss, a long operating life and excellent shock resistance.&nbsp;

NPI

New Product Introduction

Normally-closed contact (NC)

A contact breaking (opening) a circuit when operated (normally closed)

Normally-open contact (NO)

A contact closing a circuit when actuated (normally open)

O

OEM

Original Equipment Manufacturer. Such a manufacturer produces parts which are permitted to be installed in the vehicles as original (replacement) parts on contract with the vehicle manufacturer. These parts are distinct from non-licensed after-market parts that could cause difficulties in doubtful cases and could mean loss of guarantees.

OFI

Opportunities for Improvement : Audit = recommendations

Opaque

Non-transparent material structure which is used, for example, for coloured bezels of pushbuttons (see also “Transparent” and “Translucent”)

Operating torque

The force to be applied to input a command with a selector switch or keylock switch

Operating force

The force (N) which must be exerted on an actuator in order to be able to initiate the intended function.

Operating travel

The path that must be traversed in pushbuttons, mushroom pushbuttons, emergency stops, etc., in order to input a command

Operating temperature

Admissible ambient temperature range during operation

Operating point

The position in the switching process where the contact closes or opens

Operations according to EN IEC 61058-1

Refers to the complete cycle of a logical change of state until back in the initial position

P

PFC

Process Flow Chart

Previous products

In this catalogue, we present the current RAFI product range. Many articles from previous product ranges are still available. Please contact your usual RAFI distribution partners.

PLC

Product Life Cycle: The product life cycle describes the history of a product from the first idea, its development and test to series production and the final subsequent expiration of the product. Other abbreviations: PLCM (Product Life Cycle Management), also PLM.

Potentiometer drive

An actuator of control components used for operating a potentiometer

PPAP

PPAP (series parts approval) and PPF (production process and product release) is a process in which series parts are sampled prior to series production. This process comes from the automobile industry, where the primary issue is quality of the delivered parts – this means that the parts made from production tools and production processes must correspond to the drawings. There is a classification system for various levels (submission levels) of sampling. PPAP has a total of 5 submission levels (PPF has 3 submission levels)

Product labelling of switching elements

See table in the glossary pg. 6–13

Priority keylock switch

Offers various functions/switching positions with different keys

Pushbutton

Pushbuttons are actuators operated by pressing. Pushbuttons may have a momentary contact or a latching switch function.

Panel mounting sockets

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB">Sockets for holding filament lamps and LEDs in a socket</span>

Plastic materials

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB"><span style="font-family: Verdana, sans-serif; font-size: 12px; ">Housings, keycaps and bezels are exclusively made of thermoplastics or duroplastics with excellent electrical characteristics, high impact and temperature resistance. We do not use any cadmium for surface protection of contact and connection elements and we only use cadmium-free plastic materials and asbestos-free filling materials. Cadmium-containing and cadmium-free plastics have the same technical characteristics, and equivalent quality is confirmed by the manufacturers. What is limited is the colour uniformity. It is often easy to tell the difference through visual inspection. However, in general the difference can only be detected by measuring equipment.</span></span>

Protection class IEC 61058-1

Protection class 1: With protective ground terminal, Protection class 2: With protective insulation (double-insulated), Protection class 3: Protective extra low voltage.

Pad printing

Keycaps can be printed using two-component ink on special request. This type of legending is not very wear-resistant. The technique is suitable for medium quantities.

Positive opening operation according to EN IEC 60947-5-1,

Positive opening operation according to EN IEC 60947-5-1, <br /> Annex K describes the mechanical movement of a normally-closed contact which guarantees that the contact opens when the actuator is in the corresponding open position.

Q

QAA

Quality Assurance Agreement

QSA

Quality System Assessment: Part of the quality assurance measures required in QS-9000.

QSV

Quality Assurance Agreement

Quick-connect terminals

A static contact consisting of a conductor terminal (flat push-on connector for cable lugs) for integration of components into circuits

R

RACON 8

RAFI short-travel keyswitch in square design with an edge length of 8 mm and sealed gold contact system

RACON 12

RAFI short-travel keyswitch in square design with an edge length of 12 mm and sealed gold contact system

RASI

Responsible, Approve, Support, lnform: Tabular setup in which it is indicated which department is responsible, who gives the final approval, who is to provide support and which department is to be informed.

RAFIX

The brand name of the RAFI control component series. The RAFIX brand is more than 40 years old. The current RAFIX generation includes the following series: RAFIX 16, RAFIX 16 F, RAFIX 22 FS+, RAFIX 22 QR, RAFIX 30 FS, RAFIX FSR

RAFIX 16

A complete control component series designed for a mounting hole diameter of 16.2

RAFIX 16 F

A design-oriented control component series with a very flat design

RAFIX 22 FS+

A control component series designed for a mounting hole diameter of 22.3 mm. Special characteristics of this series are: - Low mounting depth - Easy assembly -Compatibility with short-travel keyswitches

RAFIX FSR

A control component series for rugged applications, based on RAFIX FS technology

RAFIX 22 QR

A complete control component series designed for a mounting hole diameter of 22.2 mm

RAFIX 30 FS+

A control component series for flat mounting with a mounting hole diameter of 30 mm and based on RAFIX FS technology.

REACH

Registration, Evaluation, Authorisation and Restriction of Chemicals: An EU regulation for the registration, evaluation, authorisation and restriction of chemicals

Reflow soldering

Reflow soldering is a soldering process for SMT components. In this process, a solder paste placed onto the printed circuit board or conductive film is melted by heat (infrared, vapour phase, laser or radiant heater) and subsequently hardened by cooling down to form a rigid connection with the component.

RF 15

RAFI short-travel keyswitch series of square design with an edge length of 15 mm provided with gold or silver contacts and many different integrated illumination options

RF 19

RAFI short-travel keyswitch series of square design with an edge length of 19 mm provided with gold or silver contacts and many different integrated illumination options

RG 85 III

A modular short-travel system for lift controls, info terminals, vending machines, etc. The RG 85 III product series comprises pushbuttons, signal indicators and keylock switches.

RK 90

Standard keycap system for use with RAFI short-travel keyswitches

RMA

Return Merchandise Authorization

RoHS

Restriction of Hazardous Substances: An EU regulation for the restriction of the use of certain materials in electrical and electronic devices

RS 74

RAFI full-travel keyswitch series with an operating travel of 2.5 mm

RS 76

RAFI full-travel keyswitch series with an operating travel of 4 mm

R@R

Run at Rate (Significant Production Run): Daily production run – part of the APQP (Advanced Product Quality Planning). During the Run@Rate, the machines and systems are tested to see if they can produce the agreed-upon daily amounts. (Also: Production Trial Run)

Rated operating voltage (Ue) IEC-60947-1

The voltage that together with the rated operating current determines how the device can be used.

Rated operating current (Ie) IEC 60947-1

The amperage (A) a switching device may conduct, taking the rated operating voltage, the operating time, the usage category and the ambient temperature into account.

Rated uninterrupted current (Ithe) IEC 60947-1

The amperage (A) a device may conduct in continuous duty (for weeks, months, years).

Rated insulation voltage (Ui) IEC 60947-1

The voltage (V, kV) to which insulation tests and creepage distances refer. The maximum rated operating voltage must not be higher than the rated insulation voltage.

Rated impulse withstand voltage (Ui) IEC 60947-1

A measure for the strength of the interior of a switching device to withstand rated impulse surge voltages (kV)

Rotary switch

A rotary switch is a special integrated PCB keyswitch used for adjusting switching states by means of a mechanical rotary motion. Different switching states are achieved through assigned rotating angles.

Recommended colour coding according to EN 60 204-1

See table in the glossary pg. 6–10 ff.

Resistance to climatic conditions

Maximum admissible temperature and humidity range

S

Switching elements

Contact elements for opening or closing a circuit. Switching elements can contain a variety of non-potential contact chambers for this purpose

Switch

This term is often used as a generic term for electrical switching components. In contrast with pushbuttons, switches latch when operated once. To unlatch them, they must be operated again.

Switching device

General term used for single components for opening or closing circuits

Switching contact

The purpose of switching contacts is to switch on circuits, conduct currents, switch off circuits and ensure insulation when circuits are open.

Switching capacity

A parameter specifying the rated operating currents (Ie) as a function of the rated operating voltage (Ue)

Shock resistance

Describes the ability of a switching device to withstand pulse-like impact movements without effect on the operating status and without suffering mechanical damage.

Screw terminal

A static contact as a conductor terminal (screwed) to integrate components into circuits

Signal lamps

Components indicating process states on machines by means of a visual signal

Silver contacts (Ag contacts)

Silver or silver-nickel alloys are commonly used for switching power greater than/equal to 1W and voltages greater than/equal to 12V

SMT (Surface Mounted Technology)

SMT devices are provided with a soldering contact pad. They are soldered directly onto the surface of a printed circuit board.

SOP

Start of Production/ Start of Pilot: 1. Start of Production: Common designation in the industry for the start of series production. 2. Start of Pilot: Within GM, the abbreviation stands for Start of Pilot because of a designation in a parts list system. The start of production is abbreviated to SORP at GM.

SQA

Supplier Quality Assurance: Quality assurance of external parts. Area in the plants responsible for quality assurance of supplier parts I external parts.

SQAM

Supplier Quality Assurance Manager (supplier manager)

Spacer

Used to obtain a defined distance between the front plate and the printed circuit board (e.g. 9.2 mm – Front plate thickness = Spacer height)

Single-handed assembly

The installed actuator is held in the mounting hole during assembly by the injected seal. This makes it possible to pre-install all actuators to the front side, even if minor vibrations occur. Subsequently, the threaded ring can be fastened in a final assembly step without having to hold the components in place.

Spring-loaded clamp

A static contact as a conductor terminal (using a self-clamping spring) to integrate components into circuits

Spring cage terminal

Static contact as a conductor terminal (with conducting, bundling cage frame) for integrating components into circuits

Short-travel keyswitch

An electromechanical keyswitch with a maximum travel of 1 mm providing a distinct tactile feedback for the complete operating behaviour

Storage temperature

Admissible temperature range (°C) for storing a device

Signal indicator

Coloured indicating element for visual indication of machine states on control components

Solder terminals (etc.) IEC 61058-1

Contact points on a component used for connection to a printed circuit board by soldering

Solder heat resistance

Definition of the maximum admissible soldering time and temperature when soldering components with solder terminals. THT: IEC 600 68-2-2; SMT: IEC 600 68-2-58

Spark distance EN IEC 60947-1, EN IEC 61058-1

The shortest distance (mm) in air between two conductive parts

Standard

A rule with a generally accepted binding nature

Special sealing

A non-wear seal for pushbuttons

Selector switch with long handle

A selector switch with a larger handle which is used if operation requires the wearing of gloves, for example&nbsp;

Selector switch

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB"><span style="font-family: Verdana, sans-serif; font-size: 12px; ">Actuators used for selecting a certain condition. Selector switches are operated by turning and offer an unambiguous switching position indication.</span></span>

T

Tactility

Tactile feedback

TES

Technical Equipment Specification: One of the former 7 supplemental handbooks to QS-9000. It describes the additional requirements applicable to manufacturers of tools (tooling) and production equipment (equipment). Was retracted by the AIAG in May 2007 and therefore is no longer used.

THT (Through Hole Technology)

Through hole technology involves inserting the components through the PCB holes and joining them with special THT soldering processes (wave soldering, manual soldering).

Tolerances

Our specifications sometimes contain information on tolerances. Any tolerances that are not specified are in conformance with DIN ISO 2768 m-k.

TFC

Team Feasibility Commitment: A form from the AIAG APQP process that must be presented for technical review. In this form, the supplier shows how the manufacturability of the specific part is guaranteed.

Translucent

Light-permeable material structure for diffuse (sometimes coloured) illumination of a large area

Transparent

Light-permeable material structure, sometimes with colour mixed in, used for example in diffuser lenses

Terminals

Specifies the way a switch is connected to a circuit or device to switch. Available types are screw terminals, solder terminals, PCB mounting pins, stranded wires, wire-wrap terminals, and a large selection of male and female connectors. Terminals are static contacts for connecting RAFI components with wires, conductor tracks, etc. Static contacts can be designed as temporary contacts (screw, quick-connect, cage clamp terminals, etc.) or permanent contacts (solder, welding contacts, etc.).

Twin pushbutton

Two separate pushbuttons on one switching unit

Tightening torque (Nm)

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB">A measure for the torsional effect of a force (N) acting on a rotary object</span>

Torque

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB"><span style="font-family: Verdana, sans-serif; font-size: 12px; ">A measure of a force applied to a rotating body&nbsp;</span></span>

Toggle switch

<span style="font-size:11.0pt; line-height: 107%; font-family:&quot;Calibri&quot;,sans-serif" lang="EN-GB"><span style="font-family: Verdana, sans-serif; font-size: 12px; ">Actuator indicating the switching status by the lever position.</span></span>

Tool

An auxiliary item used for assembly

U

UL

Underwriters Labratories (US-approval organisation)

Usage categories to IEC 60947-5-1 [120 -230V]

Alternating current [AC]: AC-12 Control of resistive loads and solid-state loads with isolation by optocouplers AC-13 Control of solid-state loads with transformer isolation AC-14 Control of small electromagnetic loads (72 VA) AC-15 Control of electromagnetic loads (72 VA) Direct current [DC]: DC-12 Control of resistive loads and solid-state loads with isolation by optocouplers DC-13 Control of electromagnetic loads DC-14 Control of electromagnetic loads having economy resistors in circuit

Units of measurement

All dimensional information in the catalogue are given in mm. For conversion tables of various units of measurement see the glossary pg. 6–13

V

VDE

Verband Deutscher Elektrotechniker – Association for Electrical, Electronic and Information Technologies (German approval organisation)

W

Wave soldering

Process for lead-free and lead-based soldering; standardised in E DIN EN 60068-2-20

Z

Positive opening operation according to EN IEC 60947-5-1,

Annex K Describes the mechanical movement of a normally-closed contact which guarantees that the contact opens when the actuator is in the corresponding open position.

YOUR CONTACT

RAFI GmbH & Co. KG

Ravensburger Str. 128–134
D-88276 Berg/Ravensburg
Tel.: +49 751 89-0
Fax: +49 751 89-1300