RAFI LEXICON

TERMS FROM THE WORLD OF DATA INPUT

Here you will find explanations and additional information about our products and procedures, listed in alphabetical order, as well as industry-specific abbreviations, standards, and dimensions. If you want to find a specific term, simply use the term search function.

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 molding

This procedure involves first molding the character. Then the appropriate keycap form is molded around it. Advantage: The character is an integral part of the keycap.

3

30,5 mm

Mounting hole acc. to IEC 60947-5-1

9

9,2 mm

This is a RAFI-specific mounting dimension. With a mounting depth of 9.2 mm behind the front panel surface, the printed circuit board can be installed carrying RAFI components such as MICON 5, RACON 8, RACON 12, KN 19, RF 15, RF 19, and RAFIX 22 FS switching elements.

A

AIAG

Automotive Industry Action Group (US automotive industry association): An organization established by the vehicle manufacturers Ford, DaimlerChrysler, and GM that develops uniform standards, forms, and expectations of suppliers.

AOI

Automatic Optical Inspection

AP

Advanced Purchasing: Purchasing unit that handles incoming purchases prior to the start of volume production.

APQP

Advanced Product Quality Planning (and Control Plan) This is part of the quality assurance measures required by QS-9000.

AQE

Advanced Quality Engineer: Supplier’s quality assurance employee who is responsible for maintaining supplier quality and for the relevant supplier processes.

ASL

Approved Supplier List: List of approved suppliers for a company. Included here are suppliers who have been examined by the Purchasing or Supplier Management departments according to various criteria, and who meet specific standards of quality, delivery capacity, and delivery times, as well as cost-effectiveness. Inclusion in the ASL of a globally operating, renowned company can help a supplier compete with other candidates.

AVSQ

Anfina Valuatione Sistemi Qualita: Quality management system of the Italian automotive industry, comparable to QS-9000 and currently part of ISO/TS 16949. (Ital.: Associazione nazionale dei Valutatori di Sistemi Qualita)

AWG – American Wire Gauge

Marking denoting thickness and diameter of solid and stranded wires

Actuator

Components pressed mechanically by the operator. Actuators are always located on the surface of a machine.

Ambient temperature

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

Assembly without tools

An assembly process that can be performed without any aids

B

Bezel

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

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 that generates an acoustic signal (piezo type)

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 permitted

C

CCC

The CCC certificate (China Compulsory Certificate) is the compulsory Chinese certificate for various product groups, in particular electrical engineering products. Products that require certification may only be imported to China and sold there after they have received CCC certification.

CE mark

Mark for devices that meet the European Low-Voltage Directive. The CE mark indicates that the device meets all pertinent requirements and regulations. See also table in the glossary, pages 6–12.

Click quick fastener

For attaching pushbuttons on the front (LUMOTAST FK, LUMOTAST 25)

CSA

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

Collar

The housing of an actuator

Collar shape

Various types are possible; common collar shapes are round and square

Code colors 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 (safe state) Blue – urgent (action required) White – no special significance Gray – no special significance Black – no special significance (see also table, pages 6–10 ff)

Contacts

A distinction is made between static and separable contacts. Static contacts can have separable 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) a switching device can conduct for at least 8 hours without thermal overload

Creepage distance EN IEC 60947-1, IEC EN 61058

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

Contact chamber

The shielded space around a switching contact

Change-over contact

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

Contact block product marking

See table in the glossary, pages 6–13

D

DFMEA

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. They are available on request. In your inquiry, please state the exact order numbers of the products.

Degree of protection

See table in the glossary, pages 6–14

Diffuser lens

Part 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 legended.

Dupe-proof

Quality of emergency stop switches according to EN 60947-5-5. Dupe-proof means that, when an accumulated force is applied, a point is reached from which the actuation of a component cannot be cancelled.

Degree of contamination DIN EN 60947-1

A measure of quantities of conductive or moisture-absorbing dust, gas, or salt and the relative humidity which may reduce the dielectric strength of a switching device. The degree of contamination is described in 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 under a defined electrical load

EMS

Electronic manufacturing services (contract manufacturing of electrical assemblies)

EMC / EMVG

EMC = Electromagnetic compatibility: The components listed in this catalog are “elementary components such as switches, signal lamps and the like” in the sense of the Law on Electromagnetic Compatibility (= EMVG [German]). Therefore, they do not fall under the scope of the EMC.

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 this approval procedure. Others are under preparation for approval. Explanation of ENEC ratings – Example: 25T85 (70) means: - Minimum temperature: - 25°C - Maximum temperature: + 85°C (without lamp) - Maximum temperature: + 70°C (with lamp)

Error Proofing

Poka Yoke/ error prevention: System (method) for preventing errors and immediately detecting random errors. Translation: Poka = random, inadvertent error and Yoke = avoid, prevent. Therefore Poka Yoke = avoiding random errors. Error proofing is the English expression for Poka Yoke. Sometimes the term mistake proofing is also used.

ESD strength

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

Engraving

This labor-intensive procedure involves engraving the desired symbol into the keycap, then coloring 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-relevant actuators with a mechanical latching function. Emergency stop switches can be used for emergency stop functions according to IEC EN 13850 and 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). For original operating instructions, see pages 6–16f

Extension plunger

An accessory for tactile switches used to adapt the actuating area to obtain different sizes and heights.

F

Flat quick-connect terminal

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

Flammability class

Specifies the flammability of a product. For details, see table in the glossary, pages 6–12

FMEA

Failure Mode and Effects Analysis: The purpose of an FMEA is to find potential failures as early as possible in the development process in order to obtain as reliable a design as possible.

Front ring

Design element of RAFIX 22 FS+ and RAFIX 22 QR control components

Fixing nut

Used to fix the device in the front panel

Fixing spanner

Assembly tool for optimum component assembly

Filament lamp

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

Full-travel key switch

An electromechanical key switch with a travel from 1 to 5 mm, optimized for rapid 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 terminal

Solder terminal bent outward and used for SMT components

Grid spacing

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

H

Hall technology

The Hall effect occurs in a current-carrying conductor located within a magnetic field. An electrical field builds up which is perpendicular to the direction of current and to the magnetic field. This compensates the Lorentz force acting on the electrons. The Hall effect can be used for switching and position determination. The switching of the RS 76C is based on this technology.

Hot stamping

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

HMI

Human Machine Interface

Handle

The part of a selectors switch used for turning the switch

Housings alignable without gaps

Control components with a housing collar that is square-alignable such that a control panel can be created with no gaps. There are no gaps between the housings of the various actuators. This prevents any accumulation of dirt.

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 housing: 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 that apply for automotive suppliers. ISO/TS 16949 was created by the International Automotive Task Force (IATF) for all globally 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, key switches, 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 key switches (RG 85 III, RF)

Indicator light

A signal lamp indicating a status by lighting up or extinguishing

Indicators

Components designed to emit a signal to the operator.

J

J-lead

Solder terminal bent inward, used for SMT components

JEDEC

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

JiT

Just in Time

K

KN 19

Short-travel mains switch for flat data input systems, overall height of RAFI KN 19: 9.2 mm

KPC

Key Product Characteristic: A key product characteristic is a special marking of a characteristic 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 characteristics used sometimes differs very widely depending on the OEM. (Most can be found as abbreviations in i-Qpedio)

Keylock switch

Actuator with authorizations. The key is used as a control part. For its keylock switches, RAFI only uses key cylinders from renowned keylock system manufacturers. Keylock switches are open mechanical systems that can require operator maintenance depending on the ambient conditions. We refer to our suppliers’ instructions for the appropriate service.

Keycap

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

Key switch

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

L

Lamp

A luminous element with an artificial light source used for illumination

Lamp socket

An element which can accommodate a standard luminous element with a socket

Laser engraving

This type of legending is recommended e.g. when complete keyboards with different layouts are required. RAFI issues a legending program for this. The keyboards can then be legended as required in a short time. 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 used, for example, to indicate a signal status. LEDs can be operated either with direct current (DC) or alternating current (AC).

LED-Clip

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

Luminous element

A term designating electric components that emit light

LUMOTAST

Brand name for RAFI key switch series which have been supplied 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 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 recognize the effects of the specific input or output signal. Legending technologies used by RAFI: - Engraving - Hot stamping - Pad printing - 2-shot molding - Laser engraving - etc.

Latching

The contact remains in the switching position when operated once

Latching function

The contact remains in the switching position when operated once

Label holder

Legend 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 are not subject to abrasion.

Locating pip

An indentation provided for locating an actuator. Mounting holes that comply with IEC 60 947-5-1 are provided with this groove.

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 panel for installing RAFI components. Mounting holes may be standardized, e.g. according to EN 60 947-5-1.

Mounting depth

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

Make current

The current that flows immediately after initial power-on. This may be many times the rated current that flows subsequently.

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 packaging, 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 during making and breaking a contact. It has 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 with light generated by electrical discharge effects in thinned gases. The advantages are low heat loss, long operating life, and excellent shock resistance.

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 on behalf of the vehicle manufacturer which are permitted for installation in the vehicles as original (replacement) parts. These parts are distinct from non-licensed parts that could cause difficulties and loss of warranty.

OFI

Opportunities for Improvement : Audit = recommendations

Opaque

Non-transparent material structure which is used, for example, for colored 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 by pushbuttons, mushroom pushbuttons, emergency stop buttons, etc., in order to input a command

Operating temperature

Permitted 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 switching operation until return to the initial position

P

PFC

Process Flow Chart

Previous products

This catalog presents the current RAFI product range. However, most articles from previous product ranges are still available. If you want an older product, please contact your RAFI sales partner.

PLC

Product Life Cycle: The product life cycle describes the history of a product from the first idea, through development and testing, to volume production and final discontinuation. Other abbreviations: PLCM (Product Life Cycle Management), also PLM.

Potentiometer drive

An actuator of control components used for operating a potentiometer

PPAP

Production Part Approval Process: or PPF (production process and product release) is a process in which series parts are sampled prior to start of volume production. This process originated in the automotive industry, where the focus is on quality of supplied parts. Specifically, the parts made from series tools and 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)

Priority keylock switch

Offers various functions/switching positions with different keys

Pushbutton

Pushbuttons are actuators actuated by pressing. Pushbuttons may have a momentary contact or a latching switching function.

Panel mounting sockets

Sockets for holding filament lamps and LEDs

Plastic materials

Housings, keycaps and bezels are exclusively made of thermoplastics or duroplastics with excellent electrical characteristics as well as high impact and temperature resistance. We do not use cadmium for the surface protection of contact and connection elements. Furthermore, we only use cadmium-free plastics and asbestos-free filling materials. The same technical data applies to plastics with and without cadmium. The manufacturers confirm the same quality. However, color consistency is limited. It is sometimes easy to tell the difference just by looking. However, usually the difference can only be detected using measuring equipment.

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

On request, keycaps can be printed using two-component ink. 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, 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 tactile switch in square design with an edge length of 8 mm and sealed gold contact system

RACON 12

RAFI tactile switch in square design with an edge length of 12 mm and sealed gold contact system

RASI

Responsible, Approve, Support, lnform: Tabular setup that indicates which department is responsible, who gives final approval, who provides 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 profile

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 tactile switches

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, Authorization and Restriction of Chemicals: An EU directive governing the use of chemicals

Reflow soldering

Reflow soldering is a soldering process for SMT components. A solder paste applied to the printed circuit board/membrane is melted by heat (infrared, vapor phase, laser, or radiant heater), then cooled and hardened to form a rigid connection with the component.

RF 15

RAFI tactile switch 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 tactile switch 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 elevators, information terminals, vending machines, etc. The RG 85 III series comprises pushbuttons, signal indicators, and keylock switches.

RK 90

Standard keycap system for use with RAFI tactile switches

RMA

Return Merchandise Authorization

RoHS

Restriction of Hazardous Substances: An EU directive restricting the use of certain materials in electrical and electronic devices

RS 74

RAFI full-travel key switch series with an operating travel of 2.5 mm

RS 76

RAFI full-travel key switch series with an operating travel of 4 mm

R@R

Run at Rate (Significant Production Run): Daily production run – part of APQP (Advanced Product Quality Planning). Run@Rate involves testing whether the machines and systems are able to produce the target daily quantities. (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 can 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 can conduct in continuous duty (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 of the strength of the interior of a switching device to withstand rated impulse overvoltages (kV)

Rotary switch

A special, integrated PCB key switch used for adjusting switching states by means of mechanical rotary motion. Different switching states are achieved with specific rotation angles.

Recommended color coding according to EN 60 204-1

see table in the glossary, pages 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 general term for electrical switching components. Unlike pushbuttons, switches latch when operated once. To unlatch them, they must be operated again.

Switching device

General term 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 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 powers greater than/equal to 1W and voltages greater than/equal to 12V.

SMT (Surface Mounted Technology)

SMT devices are provided with a contact pad that can be soldered. 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 industry for the start of volume production. 2. Start of Pilot: At GM, the abbreviation stands for Start of Pilot because of a designation in a parts list system. The start of production is abbreviated as SORP at GM.

SQA

Supplier Quality Assurance: quality assurance of outsourced parts. Department in the plants responsible for quality assurance of supplier parts/outsourced parts.

SQAM

Supplier Quality Assurance Manager (supplier manager)

Spacer

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

Single-handed assembly

The injected seal holds the actuator in the mounting hole during assembly. This makes it possible to pre-install all actuators on 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 (with a self-clamping spring). It integrates components into circuits

Spring cage terminal

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

Storage temperature

Permitted temperature range (°C) for storing a device

Signal indicator

Colored 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 permitted 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, for example, for operation wearing gloves

Selector switch

Actuators used for selecting a certain condition. Selector switches are operated by turning and offer an unambiguous switching position indication.

T

Tactility

Tactile feedback

TES

Technical Equipment Specification: One of the former 7 supplemental manuals to QS-9000. It describes the additional requirements applicable for manufacturers of tools (tooling) and production equipment (equipment). Was retracted by the AIAG in May 2007 and is therefore 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 colored) illumination of a large area

Transparent

Light-permeable material structure, sometimes colored, used for example in diffuser lenses

Terminals

Specifies how a switch is connected to a circuit or device it switches. The types available 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, plug-in, cage clamp terminals, etc.) or permanent contacts (solder and weld contacts, etc.).

Twin pushbutton

Two separate pushbuttons on one switching unit

Tightening torque (Nm)

A measure for the torsional effect of a force (N) acting on a rotary object

Torque

A measure of the force on a rotating body

Toggle switch

Actuator that indicates the switching status by the switching position.

Tool

An aid used for assembly

Tactile switches

Electromechanical pushbuttons with a maximum travel of 1 mm. They deliver a distinct tactile response over the entire operating behavior

U

UL

Underwriters Labratories (US approval organization)

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

Alternating current [AC]: AC-12 Controlling resistive loads and semiconductor loads in input circuits of optocouplers; AC-13 Controlling semiconductor loads with transformer isolation; AC-14 Controlling small electromagnetic loads (72 VA); AC-15 Controlling electromagnetic loads (72 VA). Direct current [DC]: DC-12 Controlling resistive loads and semiconductor loads in input circuits of optocouplers; DC-13 Controlling electromagnetic loads; DC-14 Controlling electromagnetic loads with economy resistors in the electric circuit

Units of measurement

All dimensions in the catalog are given in mm. For conversion tables of various units of measurement, see the glossary on pages 6–13

V

VDE

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

W

Wave soldering

Process for leaded and lead-free soldering, standardized in E DIN EN 60068-2-20

Z

YOUR CONTACT

RAFI GmbH & Co. KG

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