I see it as the coil is held in in either position, hit the momentary=20 switch and the relay switches. hit the switch again and it changes back=20 to original position. The coil works with DC or AC. The DC doesn't care=20 which way it flowing. On 1/20/2012 2:37 PM, alan smith wrote: > =20 > > I have someone who wants to control this from a single output > > http://www.hansphin.com/Documents/Y20S-1.pdf > > Pretty sure for a 24VDC, you need to swap the + and - controls to latch a= nd unlatch? Seems typical but just seeing how others interpret the datashe= et > > > =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .