Latching Relay

[Bern]

Quick question on Latching Relays. I need a latch that does not need continuous power. I want to be able to pulse it on, and pulse it off. In looking at latching relays on Goldmine and AllElectronics, they have single and double coil units. In their descriptions I find it unclear how they operate. In looking up these relays at manufacturers sites, I can’t find them all. Is there a conventional method in the operation of these relays? Thanks

[3Phase]

Check out [url=http://www.mouser.com,]www.mouser.com,[/url] magnecraft makes some latching relays that might work for you.

[philba]

I believe that single coil requires a reversal of the voltage to unlatch and double has one coil for each direction.

[Robert Reed]

The ones I am familiar with use a mechanical latching scheme. Coils were used mainly as solenoids to trip the device one way or the other.

[Chris Smith]

They make latching relays with a cam plate and a solenoid that flips and then flops a set of points on, then off.

These relays have a diamond shaped head mounted on a simple solenoid, and a cam follower which drives the switch roller or rocker.

Check out older style hot tubs before they went digital if you cant find any, as the controller I worked on last year had several of these units.

One pulse = low pump setting, the next is hi, same for the air system, and a few other settings.

I still have my old contacts for the service department in my email and the name of the unit is ....[from the service guy]
*********************************

"this unit is a Len Gordon unit"
"What is on the cover FF-????? or hl-???? maybe HT-?????"

<small>[ October 31, 2005, 02:41 PM: Message edited by: Chris Smith ]</small>

[k7elp60]

Mouser has them, used to be Potter & brumfield S89 series they are now Tyco, page 1241 of the current catalogue. They are very close to what Chris Smith described. I have used the S89 series.
One impulse latches,the next impulse unlatches.