What do the numbers on a relay mean

Numbers of a Relay Note that each pin is numbered. 85 and 86 are the coil pins while 30, 87, and 87a are the switch pins. 87 and 87a are the two contacts to which 30 will connect. If the coil is not activated, 30 will always be connected to 87a. Think of this as the relay in the Normally Closed (OFF) position.

1. What are the numbers on top of the relay?
2. What is 11 12 and 14 on a relay?
3. What is 13 and 14 on a relay?
4. What is L1 and L2 in a relay?
5. What is 86 on a relay?
6. What is 30 and 87 on a relay?
7. What is a 12 V relay used for?
8. What is a 27 relay?
9. What is 87B on a relay used for?
10. Is 13 14 normally open?
11. What is Y1 and Y2 on a safety relay?
12. What does 85 and 86 mean on a relay?
13. What is 50N and 51N in relay?
14. What does A1 and A2 mean on a relay?
15. What are the numbers on a 4 pin relay?
16. What do pins 30 and 87 do on a relay?
17. What is Y1 and Y2 on a safety relay?
18. What are the 4 parts of a relay?
19. Which number on a relay is ground?
20. What is A1 and A2 on a relay?

What are the numbers on top of the relay?

They're called DIN-standard relay terminal numbers; DIN stands for Deutsches Institut für Normung (German Institute for Standards). Sometime around the middle of the last century, German cars began following DIN 72552, which is a numbering standard for automotive electrical terminals.

What is 11 12 and 14 on a relay?

11: relay common. 12: relay normally closed (connected to 11 when coil is not energised) 14: relay normally open (connected to 11 when coil is energised)

What is 13 and 14 on a relay?

Terminal 14 is positive, terminal 13 is negative.

What is L1 and L2 in a relay?

1. The two vertical lines that connect all devices on the relay logic diagram are labeled L1 and L2. The space between L1 and L2 represents the voltage of the control circuit. 2. Output devices are always connected to L2.

What is 86 on a relay?

Terminal 86 supplies power to the relay's internal electromagnet. Terminal 85 grounds the electromagnet. Terminal 30 supplies power to one of the internal switch contacts. Terminal 87 connects the other internal switch contact to the device controlled by the relay.

What is 30 and 87 on a relay?

Numbers of a Relay

85 and 86 are the coil pins while 30, 87, and 87a are the switch pins.

What is a 12 V relay used for?

12V DC relay switches are the best solution for full voltage applications, as they allow a low current flow circuit to control a high current flow circuit, like a vehicle's horn, headlights, auxiliary lamps, fan motors, blower motors and countless pieces of equipment existing on vehicles today.

What is a 27 relay?

27 Undervoltage relay A relay that operates when its input voltage is less than a predetermined value. 28 Flame detector A device that monitors the presence of the pilot or main flame as in such apparatus as a gas turbine or a steam boiler.

What is 87B on a relay used for?

The Type 87B relay is a high-speed or instantaneous differential voltage device intended primarily for bus differential protection. High current sensitivity also allows the relay to be used for differential protection of resistance grounded systems and machines or reactors.

Is 13 14 normally open?

Normally open= 13 & 14, normally closed= 21 & 22.

What is Y1 and Y2 on a safety relay?

There is another monitoring circuit between the connection points Y1 and Y2 (feedback loop). This connection is used to check and monitor the position of actuators, which can be activated or shut down via the safety contacts.

What does 85 and 86 mean on a relay?

85 and 86 are the coil pins while 30, 87, and 87a are the switch pins. 87 and 87a are the two contacts to which 30 will connect. If the coil is not activated, 30 will always be connected to 87a. You can think of this as the switch in OFF.

What is 50N and 51N in relay?

2 device number 50N and 51N) that operates when the current exceeds a predetermined value. Relay 50N operates instantaneously. Relay 51N operates based on IEC 60255 Standard Normal Inverse IDMT (Inverse Definite Minimum Time) trip characteristic.

What does A1 and A2 mean on a relay?

What Do A1 and A2 Mean on a Contactor? A1 and A2 on a contactor typically refer to either end of the electromagnetic coil assembly. Most contactor manufacturers use A1 and A2 to designate the two terminals connecting electrical power to the contactor's magnetic coil.

What are the numbers on a 4 pin relay?

4 Pin Relay

4 pin relays use 2 pins (85 & 86) to control the coil and 2 pins (30 & 87) which switch power on a single circuit. There are 2 types of 4 pin relay available; normally open or normally closed. A normally open relay will switch power ON for a circuit when the coil is activated.

What do pins 30 and 87 do on a relay?

One of these will be used to ground your current, while the other will be connected to an accessory, or your point of current. 87 and 87a will be connected to your controlled accessories that you wish to turn on and off with your relay. 30 will then be the pin connected to your battery power.

What is Y1 and Y2 on a safety relay?

There is another monitoring circuit between the connection points Y1 and Y2 (feedback loop). This connection is used to check and monitor the position of actuators, which can be activated or shut down via the safety contacts.

What are the 4 parts of a relay?

A simple electromagnetic relay consists of a coil of wire wrapped around a soft iron core (a solenoid), an iron yoke which provides a low reluctance path for magnetic flux, a movable iron armature, and one or more sets of contacts (there are two contacts in the relay pictured).

Which number on a relay is ground?

85 will be used to ground your relay, while 86 will be connected to the switchable power. 87 and 87a will be connected to your controlled accessories that you wish to turn on and off with your relay. 30 will then be the pin connected to your battery power.

What is A1 and A2 on a relay?

What Do A1 and A2 Mean on a Contactor? A1 and A2 on a contactor typically refer to either end of the electromagnetic coil assembly. Most contactor manufacturers use A1 and A2 to designate the two terminals connecting electrical power to the contactor's magnetic coil.