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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