durite 0 728 02 relay wiring

howie ll wrote: I was wrong! It's a LATCHING relay although if our OP needs 10amps or less I would strongly recommend an Omron or Panasonic for about a quarter of the cost.

thanks for the reply, it is powering a motorcycle and the main fuse is 15amp so i think this relay is ok for the job.

i seem to have run into a problem. i have wired 30 and 56 to 12v permanent supply. i get 12v out on 56b and not 56a the 12v momentary input is connected to S on the relay and gets 12v when the remote button is pressed. but.......... it wont switch from 56b to 56a. any ideas where i may have gone wrong? the momentary relay that outputs the 12v to the S is grounded but there is no ground on the Durite relay, is this the problem? thanks in advance

30 & S must go to opposite polarities, ie if 30 is GND, then S is a 12V pulse. (Either can be pulsed.)

56 in an "off state is N/C to 56a, actuating the coil via 30 will connect 56 to 56b and disconnect it from 56a.

wow, thanks guys, it works properly now. just one more question...... i only have a 12v output connected to 56b. when the relay is switched by the 12v pulse, 56b becomes live (as i want it to) and there is 0v on 56a, as it should be. when i switch it again, the 12v drops off 56b (as it should do) and i am still getting 0v on 56a. is this correct and safe to use? will there only be a 12v output on 56a if there is something connected to it? eg, a light bulb, + to 56a and - to ground? thanks.

oh,hang on a minute i got my a's and b's all mixed up. there is a 12v output connected to 56A. when the relay is switched by 12v pulse 56A becomes live. and 0v on 56B. when switched again, 56A drops off but there is still 0v on 56B. sorry again for any confusion

hmmm, i have just studied the diagram on the side of the relay, (shown in earlier post) and it seems when the power is switched to 56b the ground wire from 30 moves away as well, so that is why there is no 12v output from 56b...... now i am confused because i thought being a changeover relay it is supposed to swap the output voltage from 1 output to the other? should this be the case or am i completely on the wrong track?(again)

Well I have certainly been wrong. I read that it was a mechanically latching relay, but further reading suggests it's a wired latcher - ie, it latches thru internal switching. Hence it has no memory, and it draws power when latched on (ie, 56 connected to 56a). Furthermore it seems that S must be a -ve (GND) pulse, not +12V, and that when on, 56a is connected to 30. Hence 30 must be +12V. (And bad luck if 56 is unpowered so that the coil's +12V 30 powers the load - ie, ensure 30 is appropriately fused and wired.) Only this morning I said how I %$^%#@!! hate specialised relays like this. I prefer (non-relay) circuits that drive standard relays. Unless this application requires zero coil current once latched, IMO this is a classic T-type flip flop or even 4017 application.

oldspark wrote: Well I have certainly been wrong. I read that it was a mechanically latching relay, but further reading suggests it's a wired latcher - ie, it latches thru internal switching. Hence it has no memory, and it draws power when latched on (ie, 56 connected to 56a). Furthermore it seems that S must be a -ve (GND) pulse, not +12V, and that when on, 56a is connected to 30. Hence 30 must be +12V. (And bad luck if 56 is unpowered so that the coil's +12V 30 powers the load - ie, ensure 30 is appropriately fused and wired.) Only this morning I said how I %$^%#@!! hate specialised relays like this. I prefer (non-relay) circuits that drive standard relays. Unless this application requires zero coil current once latched, IMO this is a classic T-type flip flop or even 4017 application.

ok, now i am totally and completely lost! i have 30 as a permanent ground and "S" as a pulse +12v and it appears to work ok, except i get no 12v output from 56b when it is switched. 56 is a fused 12v permanent supply.........

I suggest you contact Durite. The only meaningful info I have is... ...from QRZ Forum's Needing help figuring out a latching relay though that's for a VW 111-941-583 and may differ from the Durite 0-728-02