Some automotive relay sockets come with an integral snubber diode. If it doesn't, you need to tell us how the coil is being switched. The diode is more to protect a transistor or switch contacts from back EMF generated when the coil field collapses.do I need to put a diode on the relay switch to protect my battery from reverse flow of electricity ?
Never heard of a 5 pin diode; 2 and 4, but not 5. Post a part number and/or picture.If I do where do I place it (five pin diode)
Omron brand cube relays with a well hidden internal diode once caused a HUGE headache on one service call that I did. It was after the second shift at a blow molding plant and we installed a control upgrade, and I got a cube relay and socket from their stock room, and did not see that the relay had a built in diode. So of courseit got installed backward, and the controller did not operate it and the machine would not work for the morning shift. It took quite a few hours to find that the flaw was that the diode was connected in reverse. Exchanged the two relay coil connections and the machine ran fine. I NEVER use Omron relays or other parts since that time.In general inductive clamps / snubbers are good. If L load being switched by a mechanical
switch it aids in reducing contact burn and oxidation of the contacts. If sensors
are attached to the L load, helps to minimize injection current into their pins.
https://www.hw-group.com/cs/podpora/how-not-to-destroy-a-relay
https://www.ia.omron.com/support/faq/answer/36/faq02804/
https://www3.panasonic.biz/ac/e/control/relay/cautions_use/index.jsp
Regards, Dana.
I would never prohibit the use of a particular manufacturer due to what would essentially be inattentivity and a mistake on my part!I NEVER use Omron relays or other parts since that time.
But then again you understand things. Omron is not the only company making relays like that, they all do. He just happened to get one the went from Omron to Omoron.I would never prohibit the use of a particular manufacturer due to what would essentially be inattentivity and a mistake on my part!
Max.
I've got another question . I added two more headlights to my bike so I got two relays and hooked the original high low switch to them and jumped the power from low to high then ran low wire and high wire to original headlight then from high wire to both extra head lights . on low only middle one works (like its wired) but when I put it on high beam the outside bulbs work an the middle one cuts off . what am I doing wrong , are my relays not strong enough or should the be wired to the low beam side ? thanks for your tmeI think you are referring to a bridge rectifier. Usually they match the capacity of the alternator. There is some back EMF from the relay coil but it should not be an issue. If your relay was designed for a car or motorcycle, it will likely have protection. I think power load may be more of a concern. Check your manual and add up the watts.
You added two additional headlights or you added spots? Never saw a bike with three headlights, two yes but three nope. Have you got the manual for your bike including the wiring diagram? You make no mention of the current capability of these relays? A typical 12 VDC coil automotive relay is normally a 30 amp contact relay and I doubt any lamps you could add would need 15 amps each.I added two more headlights to my bike so I got two relays and hooked the original high low switch to them and jumped the power from low to high then ran low wire and high wire to original headlight then from high wire to both extra head lights .
I see motorcycles with three headlights quite often. They do it so that they can be seen better.Much of this depends on the bike and how it was designed to work. I see no mention of make and model of the bike? I ride a 92 Harley Electroglide. Replaced my headlight and side spots with Daymaker LED lights. The spots only are on when low beam is in use. Switching to Hi Beam disables the spots. This is done through the switching matrix and is intentional.
You added two additional headlights or you added spots? Never saw a bike with three headlights, two yes but three nope. Have you got the manual for your bike including the wiring diagram? You make no mention of the current capability of these relays? A typical 12 VDC coil automotive relay is normally a 30 amp contact relay and I doubt any lamps you could add would need 15 amps each.
I can't tell you why your bike is doing what it is doing since I know nothing about whatever you have? Really need a schematic to even guess why you are seeing what you are seeing.
Ron
Does this motorcycle have three headlights?I see motorcycles with three headlights quite often. They do it so that they can be seen better.
For the problem of the one light going out when the others switch on, the first step is to check the voltage at that light's terminals. My guess is that the voltage drops but does not go to zero. Check that and let us know.
The rider of that bike with all of those lights must be desperately craving attention, it appears. My priorities are rather different. And I certainly would not wish to attract the attention of those who may choose to take my toys for themselves.
by Jake Hertz
by Aaron Carman
by Aaron Carman
by Jake Hertz