DIN 72552 Standardisation Definition Guide
30 October 2017 | AdrianR
The standardisation definition guide below is presented for identifying contact terminal configurations, specifically on automotive electrical components available at Arc Components Limited. DIN 72552 is used by most high-end component and vehicle manufacturers when creating an automotive circuit, and the DIN standardisation guide identifies the terminal connection on automotive electrical parts. Examples of Pin-in and Pin-out DIN numbering can be found on Switch Relays, Key switches, Wiper motors, etc. This definition guide will assist engineers when replacing or renewing components and wiring, where a DIN code number system has been presented.
The guide is presented with terminal identification first, followed by designation.
Relay Coil - Positive and Negative Coil Energising.
| Terminal or Contact | Identification |
| 85 | Relay coil - Negative. |
| 86 | Relay coil - Positive. |
Relay Contacts - Line Feed or Switching.
| Terminal or Contact | Identification |
| 87 | Common contact. |
| 87a | Normally Closed contact. |
| 87b | Normally Open contact. |
| 88 | Common contact 2. |
| 88a | Normally Closed contact 2. |
| 88b | Normally Open contact 2. |
Battery Circuit.
| Terminal or Contact | Identification |
| 15 | Battery Positive through the ignition switch. |
| 30 | From battery Positive direct. |
| 30a | From the 2nd battery and 12-24V relay. |
| 31 | Return to battery Negative or direct to ground. |
| 31a | Return to battery Negative 12-24V relay. |
| 31b | Return to battery Negative or ground through a switch. |
| 31c | Return to battery Negative 12-24V relay. |
Ignition System
| Terminal or Contact | Identification |
| 1 | Ignition coil, low voltage, distributor. |
| 1a, 1b | Distributor - two separate circuits. |
| 2 | breaker points magneto ignition. |
| 4 | Coil, distributor high voltage. |
| 4a, 4b | Distributor - two separate circuits, high voltage. |
| 7 | The terminal on the ballast resistor, to the distributor. |
| 15 | Battery Positive from the ignition switch. |
| 15a | From ballast resistor to coil and starter motor. |
Preheat - Diesel Engine
| Terminal or Contact | Identification |
| 15 | Preheat in. |
| 17 | Start |
| 19 | Preheat (glow). |
Starter
| Terminal or Contact | Identification |
| 50 | Starter control. |
Electric Motor - Terminals
| Terminal or Contact | Identification |
| 32 | Return. |
| 33 | Main terminal (swap designation of 32 and 33 possible in application). |
| 33a | Limit |
| 33b | Motor field. |
| 33f | 2. slow rpm. |
| 33g | 3. slow rpm. |
| 33h | 4. slow rpm. |
| 33L | Rotation left. |
| 33R | Rotation right. |
AC Generator
| Terminal or Contact | Identification |
| 51 | DC at rectifiers. |
| 51e | As 51, with choke coil. |
| 59 | AC out, rectifier in, light switch. |
| 59a | Charge, rotor out. |
| 64 | Generator control light. |
Generator - Voltage Regulator
| Terminal or Contact | Identification |
| 61 | Charge indicator (charge control light). |
| B+ | Battery Positive. |
| B- | Battery Negative. |
| D+ | Dynamo or alternator diode Positive. |
| D- | Dynamo or alternator diode Negative. |
| DF | Dynamo field. |
| DF1 | Dynamo field 1. |
| DF2 | Dynamo field 2. |
| U, V, W | AC three-phase terminals. |
Lighting Circuit
| Terminal or Contact | Identification |
| 54 | Brake lights. |
| 55 | Fog light. |
| 56 | Spotlight. |
| 56a | headlamp high beam and indicator light. |
| 56b | Low beam. |
| 56d | Signal flash. |
| 57 | Parking lights. |
| 57a | Parking lights. |
| 57L | Parking lights left side. |
| 57R | Parking lights right side. |
| 58 | licence or number plate lights, instrument panel. |
| 58d | Panel light dimmer. |
Turn Indicators
| Terminal or Contact | Identification |
| 49 | Flasher unit in. |
| 49a | Flasher unit out, indicator switch in. |
| 49b | Out 2. flasher circuit. |
| 49c | Out 3. flasher circuit. |
| C | 1st flasher indicator light. |
| C2 | 2nd flasher indicator light. |
| C3 | 3rd flasher indicator light. |
| L | Indicator lights left side. |
| R | Indicator lights right side. |
| L54 | Lights out, left side. |
| R54 | Lights out, right side. |
Window Wiper and Washer Circuit
| Terminal or Contact | Identification |
| 53 | Wiper motor Positive in. |
| 53a | Limit stop Positive. |
| 53b | Limit stop field. |
| 53c | Washer pump. |
| 53e | Stop field. |
| 53i | Wiper motor with a permanent magnet, third brush for high speed. |
Switches Circuit
| Terminal or Contact | Identification |
| 81 | Opener. |
| 81a | 1 out. |
| 81b | 2 out. |
| 82 | Lock in. |
| 82a | 1st out. |
| 82b | 2nd out. |
| 82z | 1st in. |
| 82y | 2nd in. |
| 83 | Multi-position switch, in. |
| 83a | Out position 1. |
| 83b | Out position 2. |
Acoustic Warning
| Terminal or Contact | Identification |
| 71 | Beeper in. |
| 71a | Beeper out, low. |
| 71b | Beeper out, high. |
| 72 | Hazard light switch. |
| 85c | Hazard sound on. |
Additional Circuit Functions
| Terminal or Contact | Identification |
| 52 | Signal from the trailer. |
| 54g | Magnetic valves for trailer brakes. |
| 75 | Radio, cigarette lighter. |
| 77 | Door valves control. |
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