DIN 72552

A terminal designation is to facilitate the connection of cables, but also the fault diagnosis using a circuit diagram in motor vehicles, automation systems or cabinets in machinery and equipment manufacturing and motor vehicle electrical auxiliary number or a letter. It is attached at or near the terminal, and often. Also there in the line to be connected or attached

• 4.1 Reference Books
• 4.2 Brochures

Basics

The terminal designations are partially standardized or common for certain signals or poles. One example is the letter designations of the terminals of current transformers, or connections of induction motors.

The terminal designations for motor vehicles are standardized in Germany in DIN 72552. But also different, proprietary designations are possible.

The terminal names are not the same line designation, since components can be connected with different terminal designations at the two ends of a line.

List of terminal names in motor vehicles and their meaning

Numerical designations

Ignition

Switched battery

Annealing

Battery

• 29 - Battery positive, rear, m. Crash shutdown
• 29a - Battery positive hedged back, m. Crash shutdown
• 30 - positive lead directly from the battery
• 30a - positive lead from second battery ( battery switching 12/24 V)
• 30b - terminal 30, connected from the hazard switch
• 30g - switched positive wire directly from the battery - not to be confused with terminal 15
• 30L - continuous positive
• 30t - Terminal 30 for transport mode
• 31 - minus cable from the battery or vehicle ground
• 31a - minus line 2 battery
• 31b - switched Masse-/Minusklemme (old: Breaker )

Electric motors

• 32 - Reverse line electric motor
• 33 - Main connection electric motor
• 33a - shut- electric motor
• 33f - for second smaller fan speed electric motor
• 33g - for third smaller fan speed electric motor
• 33h - for fourth smaller fan speed electric motor
• 33L - rotation left electric motor
• 33R - Direction of rotation right electric motor

Direction indicator

• 49 - Input flasher
• 49a - Output Flasher
• 49b - Output second flasher
• 49c - starting third flasher

Start switch

• 50 - Start Information on the starter
• 50A - start line to battery switch 12/24V

Generator

• 51 - rectifier generator

Windshield wiper

• 53 - wiper motor
• 53a - Windscreen ( ) shut-
• 53b - Windscreen ( shunt winding)
• 53c - washer pump
• 53e - Windscreen ( brake winding )
• 53i - Wiper motor with permanent magnet and third brush ( high speed)

Lighting

• 54 - Brake light
• 54f - Brake light on (Tarn ) light switch
• 54g - Rear fog light
• 54L - brake Left turn signal lamp
• 54R - stop-indicator light right
• S54 - Tarn- brake light
• 55 - Fog lights
• 56 - Spotlight ( input changeover )
• 56a - high beam and indicator light
• 56b - low beam
• 56d - headlight flasher
• S56 - Tarnlicht front
• 57a - parking light
• 57L - Left parking light
• 57R - Right parking light
• 58 - sidelight, indicator, instrument, tail lights
• 58b - Final light switching when walking tractors
• 58c - trailer socket, single core misplaced and fused in the trailer tail light
• 58d - Adjustable instrument lighting
• 58e -?
• 58g - Dimmed interior lighting
• 58L - Light switch terminal f left limit and tail lights, if separately switchable
• 58R - Light switch terminal f right limitation and tail lights when switched separately, license plate light
• S58 - Tarnlicht back
• S58b - Leitkreuz
• 61 - and D ; at the charge indicator light

Acoustic devices

• 71 - Horn
• Special equipment on some vehicles of authorities and organizations with security tasks 71a - bass horn with a siren ( "ta" )
• 71b - high frequency horn with a siren ( " tii " )
• 72 - rotating beacon

Switch

• 81 - input on the switch (SPDT NO / NC )
• 81a - 1.Ausgang on the switch (SPDT NO / NC )
• 81b - 2.Output on the switch (SPDT NO / NC )
• 82 - input on the switch ( normally open)
• 82a - First output on the switch (normally open)
• 82b - Second output on the switch (normally open)
• 83 - input on the switch ( multi-stage switch )
• 83a - First output on the switch ( multi-stage switch )
• 83b - Second exit at the switch ( multi-stage switch )

Relay

• 84 - Input current relay, power / relay contact
• 84a - Output current relay drive ( rotating beacon on the left)
• 84b - Output current relay, relay contact (signal lamp rotating beacon on the left)
• 84c - Output current relay drive ( rotating beacon right, etc.)
• 84d - Output current relay, relay contact (signal lamp rotating beacon right, etc.)
• 85 - Output relay, minus, control circuit on the relay
• 85c - turn-on for Tonfolgerelais
• 86 - input switching relays, plus, the control circuit on the relay
• 86s - input relay alarm

Contacts

• 87 - input power circuit on the relay (normally closed contact and changeover)
• 87a - Output power circuit on the relay (NC )
• 88 - input power circuit on the relay (normally open)
• 88a - Output power circuit on the relay (normally open)
• 88b - Output power circuit on the relay (normally connects with 88a )

Non-numeric designations

• B - battery positive on the alternator
• B - battery negative on the alternator
• C - Control lamp for direction indicators
• C0 - Main Connection for separate from the flasher indicator light
• C2 - second light ( for direction-indicator lamps on the trailer )
• C3 - third light ( for direction indicators on the second trailer )
• D - Dynamo Plus, even terminal 61 on the charge indicator light
• D - Dynamo minus
• DF - Dynamo field on the generator regulator ( regulator voltage )
• W - speed signal at the alternator
• L - Left turn signal
• R - Right turn signal

Manufacturer specific terminal designations

• ACC - Accumulator or Accessory ( accessories), switched on the ignition key position. Reiner battery operation, even before ignition terminal 15
• IG - Ignition (other name for terminal 15)
• WW - wipe / wash (for example, the rear wiper )
• INT - interval ( rear wiper )
• R - Radio ( ignition key )
• S - equipment (radio, Gurtwarnkontrolle, etc. ) connected via a pure insertion of the ignition key. Reiner battery operation, not very high loads.
• ST - starter ( cranking ignition key )
• X - Zündung/Klemme15, any connected devices are turned off during starting process to relieve the batteries

Terminal designation in switchgear and industrial plants

In switchgear and industrial equipment terminals are labeled according to a principle according to EN 81346-2 classification. According to this principle, objects are allocated on the task of local situation and fundamental function called letters. All ( electrical ) connection elements such as connection distributor, connectors, terminals, terminal block, terminal block are thereby marked with the code letter X. For a more detailed classification also double letters according to Table 2 of the main class X are possible - for example, XD = electrical connections ( ≤ 1000 V AC or 1500 V DC ≤ ) or XF = Connect to data transmission networks.

The identification system consists of a fixed sequence of marking blocks, starting with the designation ( including the location identification ), followed by a dash and the code letter for the device according to its intended purpose, or proposed task; here: connect, so -X. This code letter followed by an ordinal number, which gives an indication - by which number element of this type it is in a particular installation unit (eg in the control cabinet 1). In electrical switchgear, one can assume that with -X usually terminal strips or multipole connectors are meant. The actual connection point on a device (eg on a terminal strip) is shown deposed by a colon (:) from the code letters, such as: -X2: 100

In contrast to automotive technology, there is no fixed assignment of certain terminal numbers to given functions. This excludes the terminals of functional devices, such as a / b is an operating coil 13/14 for a "normally open " contact, etc.

Literature

Reference Books

• Jürgen Kasedorf, Richard Koch: Service Primer for the automotive electrical systems, bird book, ISBN 3-8023-1881-1

Brochures

• Bosch Technical Instruction circuit symbols and circuit diagrams of the vehicle electrical system. Robert Bosch GmbH, Stuttgart, VDT - UBE 001/ 10

• Fahrzeugelektrik