Ok i think i may have answered my own question. Most do as this has become standardized numbering based on bosch s interpretation of din standard 72 552 which deals with most electrical wiring.
After staring at some more diagrams i think that the reason there are two 87 pins 87 87a is because 87 is set up for a circuit that is normally open the contact rest on 87a and 87a is set up for a circuit that is normally closed and when the cicuit relay is energized it opens the contact.
87a relay wiring diagram. The com terminals of the relay get connected to the first part of the circuit. Save my name email and website in this browser for the next time i comment. What is a relay.
Visit the post for more. Relay logic provides you with a guide for using ncd relay controllers and how they can be wired for many types of applications. Jewelry tools wire jewelry jewelry rings jewelry design jewelry making jewelry 2014 ring making rock jewelry jewellery uk.
Use relay logic to control lights using relays in standard applications as well as 3 way switching application. Wiring a relay 87a wiring diagram schematics. A relay is essentially a switch that is operated electrically rather than mechanically.
Relay diagram 4 pin. 4 pin relay wiring diagram diagrams wiring diagram gallery 4 pin relay wiring diagram also 636 ignition wiring to her with arduino dht22 am2302 tutorial library also 74s27u as well as 5 pin din plug y beautiful 4 pin relay wiring diagram diagram 4 pin relay wiring diagram beautiful 4 pin relay wiring diagram 87a relay wiring diagram 5 pin bakdesigns co within prong kwikpik. Use relay logic to control the forward or reverse direction of motors.
Although there are various relay designs the ones most commonly found in low voltage auto and marine applications are electro mechanical relays that work by activating an electromagnet to pull a set of contacts to make or break a circuit. Ulincos auto relay u1914 with 14awg wire harness 12v dc 30 40a spdt 5 pin pack of 2. If there is no first part of the circuit this terminal can be left open.
87 87a relay wiring diagram. Relay wiring diagram 87a wiring diagrams folder. In this case the first part of the circuit is the 5 volt power supply and the 9 volt power supply to light the leds and the dc fan and dc motor.
This is a image galleries about 5 pole relay wiring diagram you can also find other images like wiring diagram parts diagram replacement parts electrical diagram repair manuals engine diagram engine scheme wiring harness fuse box vacuum diagram timing belt timing chain brakes diagram transmission diagram and engine problems. 87a 87 relay wiring lights technical diagrams. Wiring a relay 87a wiring diagram.
Notable deviations from original din to current ver 6 din bosch terminal 87 30 common relay contact 87b 87 normally closed contact. The nc terminals of the relay get power even. 5 pole relay wiring diagram.