Terminal designation
A terminal designation is an auxiliary number or a letter in mechanical engineering and plant engineering as well as in vehicle electrics to simplify the connection of cables, but also the error diagnosis using a circuit diagram in vehicles , automation systems or control cabinets. It is attached to or close to the terminal and often also to the line to be connected or connected there.
Basics
|
DIN 72552 |
|---|---|
| Area | Automotive engineering |
| title | Terminal markings in motor vehicles; Part 1 purpose, principles, requirements, part 2 meanings, part 3 application examples in connection diagrams, part 4 overview |
| Latest edition | 1971-03 |
| ISO | - |
The terminal designations are partially standardized or common for certain signals or poles. One example is the letter markings on the connection terminals of current transformers or the connections of asynchronous motors .
The terminal designations for motor vehicles are standardized in Germany in DIN 72552. However, different, manufacturer-specific names are also possible.
The terminal designations are not cable designations at the same time, since components with different terminal designations can be connected to the two ends of a cable.
List of terminal designations in motor vehicles and their meaning
Numerical designations
Ignition system
- 1 - clamp on the ignition coil . The cable leads to the breaker contact or ignition controller
- 4 - high voltage line from the ignition coil to the ignition distributor .
- 4a - ignition coil I terminal 4 (if there are several ignition coils)
- 4b - ignition coil II terminal 4 (if there are several ignition coils)
Switched plus
- 15 - switched plus from the ignition starter switch
- 15a - output at the series resistor for ignition coil and starter
- 15r - ignition lock radio position (wake-up)
Annealing system
- 15 - glow start switch input
- 17 - glow system - start
- 19 - glow system - preheat
- 50 - starter control
battery
- 29 - Battery plus, rear, with crash shutdown
- 29a - Battery plus secured, rear, with crash shutdown
- 30 - positive lead directly from the battery
- 30a - positive lead from 2nd battery, ( battery switching device 12/24 V)
- 30b - Terminal 30, switched by the hazard warning switch
- 30f - Terminal 30, shutdown when the battery is low
- 30g - switched positive lead directly from the battery - not to be confused with terminal 15
- 30L - permanent plus
- 30t - Kl. 30 for transport mode
- 31 - negative lead directly from the battery or vehicle ground
- 31a - negative lead 2nd battery
- 31b - switched earth / minus terminal (old: interrupter)
- 40 - positive lead directly from the 48V battery
- 41 - negative lead of the 48V battery
Electric motors
- 32 - Electric motor return
- 33 - Main connection electric motor
- 33a - limit switch-off electric motor
- 33b - shunt field electric motor
- 33f - for the second lower speed level electric motor
- 33g - for the third lower speed level electric motor
- 33h - for the fourth lower speed level electric motor
- 33L - direction of rotation left electric motor
- 33R - right direction of rotation electric motor
Direction indicators
- 49 - Flasher input
- 49a - flasher output
- 49b - output of the second flasher unit
- 49c - output of third flasher unit
Start switch
- 50 - Start information on the starter (magnetic switch)
- 50A - start information on battery switch 12 / 24V
generator
- 51 - + rectifier generator
windshield wipers
- 53 - Input wiper motor plus
- 53a - end position plus (contact to 53e, open in end position, e.g. via fuse on terminal 15)
- 53b - shunt winding (old, now generally additional sliding contact for slow running)
- 53c - Windscreen washer pump (windscreen washer system)
- 53e - brake winding (contact to 53a, open in end position, e.g. via switch in off position at terminal 53)
- 53i - wiper motor with permanent magnet and third brush (high speed)
lighting
- 54 - brake light
- 54f - brake light via ( camouflage ) light switch
- 54g - rear fog light (originally intended for the electrical control of a trailer brake on a truck)
- 54L - left brake indicator light
- 54R - stop-indicator light on the right
- S54 - camouflage brake light
- 55 - fog lights
- 56 - Headlights (input changeover relay)
- 56a - high beam and indicator light
- 56b - low beam
- 56d - flasher
- S56 - camouflage light in front
- 57a - parking light
- 57L - left parking light
- 57R - right parking light
- 58 - Limit lights, license plate lights, instrument lights, tail lights
- 58b - Switching the tail light on two-wheel tractors
- 58c - Trailer connector, single-core taillight installed and secured in the trailer
- 58d - Adjustable instrument lighting
- 58e -?
- 58g - Dimmed interior lighting
- 58L - light switch terminal f. left limit u. Tail lights, if they can be switched separately
- 58R - light switch terminal f. right limit u. Tail lights, if they can be switched separately, license plate light
- S58 - rear camouflage light
- S58b - guide cross
- 61 - Terminal on the rectifier and terminal on the regulator for their mutual connection to regulate the DF voltage (excitation voltage) and discharge for the regulator-side connection of the charge indicator light
Acoustic facilities
- 71 - horn
- Special facilities on some vehicles of authorities and organizations with security tasks
- 71a - low-tone horn with subsequent tone horn ("ta")
- 71b - tweeter horn with following tone horn ("tü")
- 72 - beacon (all around / flash)
- 75 - car radio / cigarette lighter
- 76 - speakers
- 77 - door valve control
counter
- 81 - Input at the switch (changeover / break contact)
- 81a - 1st output on the switch (changeover / break contact)
- 81b - 2nd output on switch (changeover / break contact)
- 82 - input at the switch (closer)
- 82a - first output on the switch (closer)
- 82b - Second output on the switch (closer)
- 83 - Input at the switch (multi-stage switch)
- 83a - First output on the switch (multi-stage switch)
- 83b - Second output on the switch (multi-stage switch)
relay
- 84 - input current relays , drive / relay contact
- 84a - Output current relay, drive (rotating beacon left)
- 84b - Output current relay, relay contact (control light rotating beacon left)
- 84c - Output current relay, drive (rotating beacon on the right, etc.)
- 84d - output current relay, relay contact (control light rotating beacon right, etc.)
- 85 - output switching relay, minus, control circuit on the relay
- 85c - switch-on signal for tone sequence relay
- 86 - Input switching relay, plus, control circuit on the relay
- 86s - input switching relay alarm system
contacts
- 87 - Input working circuit on the relay (break contact and changeover contact)
- 87a - output working circuit at the relay (NC contact)
- 88 - Input working circuit on the relay (make contact)
- 88a - output working circuit on relay (make contact)
- 88b - output working circuit at the relay (normally open contact, also connects with 88a)
Non-numeric designations
- B + - battery plus on the three-phase generator
- B– - negative battery on the alternator
- C - Control lamp for direction indicators
- C0 - main connection for control lamp separate from flasher unit
- C2 - second indicator light (for direction indicators on the trailer)
- C3 - third indicator light (for direction indicators on second trailer)
- D + - Dynamoplus
- D- - Dynamominus
- DF - dynamo field on the generator regulator (regulator voltage)
- W - speed signal on the alternator
- L - left turn signal
- R - right turn signal
- TD - signal for engine speed
Manufacturer-specific terminal designations
- ACC - Accumulator or Accessory (accessory), switched via ignition key position. Pure battery operation, terminal 15 before ignition
- IG - (ignition) ignition (other designation for terminal 15)
- WW - wipe / wash (for example on the rear window wiper)
- INT - interval (rear wiper)
- R - radio (ignition key position)
- S - accessories (radio, seat belt warning control, etc.), switched by simply inserting the ignition key. Pure battery operation, not very heavy-duty.
- ST - starter (starter ignition key position)
- X - ignition / terminal 15, devices connected to it are switched off during the start-up process to relieve the battery
Terminal designation in switchgear and industrial systems
In switchgear and industrial systems, terminals are designated according to a classification principle in accordance with EN 81346-2 . In accordance with this principle, objects are assigned so-called identification letters according to their task, location and basic function. All (electrical) connection elements such as connection distributor, connectors, terminals, terminal block, terminal block are thereby with the reference letter X in. For a more precise classification, double letters according to Table 2 of the main class X are also possible - e.g. B. XD = electrical connections (≤ 1000 V AC or ≤ 1500 V DC) or XF = connections in data transmission networks.
The identification system consists of a fixed sequence of identification blocks, starting with the system identification (including the location identification), followed by a hyphen and the identification letter for the device according to its intended purpose or intended task; here: connect, hence –X . This code letter is followed by an ordinal number that provides information about the number of elements of this type in a certain system unit (e.g. in control cabinet 1). In electrical switchgear, one can assume that –X usually means terminal strips or multi-pole connectors. The actual connection point on a device (e.g. on a terminal strip) is represented by a colon (:) separated from the code letter, e.g. E.g .: -X2: 100
In contrast to automotive technology, there is no fixed assignment of specific terminal numbers to given functions. This does not apply to the connection terminals of functional devices, e.g. B. a / b for an actuating coil 13/14 for a "closer" contact, etc.
Telephony
A naming scheme is common in the (landline) telephone system.
For TAE ("telecommunications connection unit") sockets from Deutsche Telekom , which are labeled as F- ("telephony": telephone), N- ("non-telephony": answering machine, fax, modem), and U- (" Universal ": telephone or fax etc.) type coded, there are the following terminal designations:
| Clamp | signal | meaning | function |
|---|---|---|---|
| 1 | La | a-core | Trunk |
| 2 | Lb | b-core | Trunk |
| 3 | W. | Alarm clock | for additional alarm clock |
| 4th | E. | earth | for control signals, e.g. B. in a telephone system |
| 5 | b2 | b-core | for forwarding Lb to the next can |
| 6th | a2 | a-core | to forward La to the next can |
In Austria , however, the following terms are common:
| Clamp | function |
|---|---|
| a, b | incoming (exchange) line |
| a1, b2 | outgoing (exchange) line |
| W2 (, W2) | Pluggable call organ (additional alarm clock) |
Terminal designations are also essential when interconnecting the elements of house intercom systems , which convey bells from the house gate or the floor, establish speech and possibly mostly one-way video connections and allow remote door opening. Such systems can be operated with (earlier :) alternating current, or positive or negative direct voltage, as well as with and without transistor amplification, illuminate the bell board with light bulbs or LEDs and are therefore only compatible to a limited extent. Terminal designations such as 0 for ground and B + or B– for voltage supply ("battery") are common, but others are manufacturer or model-specific.
literature
Reference books
- Jürgen Kasedorf, Richard Koch: Service primer for vehicle electrics. Vogel Buchverlag, ISBN 3-8023-1881-1 ; 14th edition, 2001 (400 pages).
- Hubert Zitt: ISDN & DSL for PC and telephone. Markt + Technik Verlag, Munich 2005, ISBN 3-8272-6987-3 .
Technical brochures
- Bosch technical instruction for circuit symbols and circuit diagrams for vehicle electrics. Robert Bosch GmbH, Stuttgart, VDT-UBE 001/10.
Web links
- Terminal designations according to DIN 72552 (PDF; 347 kB) Hoelzle Fahrzeugtechnik, Switzerland, August 15, 2018
Individual evidence
- ↑ Hubert Zitt: ISDN & DSL for PC and telephone. P. 67.