Hate to do this here... it's work related.

[chipco3434]

I need a simple solution like a Pottr & Brumfield relay (with model number).

Push a button and have relay make momentary contact then release. Wait an elapsed time (like 3-10 seconds) and have relay re-energize for a second momentary contact.

Ideally, power can be from wallwart ~ 6-12VDC. Relay contact rating is TTL level signal (~ < 50mV @ 5.5VDC.)

[CBS240]

If relay contact is TTL, what bars you from using a transistor switch or another solid state switch device for the contact switch? or do you mean the coil rating is 5.5V? Triacs will switch AC.

[anatech]

Hi chipco3434,
Yeah, it sounds like a circuit to control the relay. We would need load volts and current, AC or DC. Heck, a triac might work if it's AC.

-Chris

[Zen Mod]

Originally posted by chipco3434
I need a simple solution like a Pottr & Brumfield relay (with model number).

Push a button and have relay make momentary contact then release. Wait an elapsed time (like 3-10 seconds) and have relay re-energize for a second momentary contact.

Ideally, power can be from wallwart ~ 6-12VDC. Relay contact rating is TTL level signal (~ < 50mV @ 5.5VDC.)

combine this with simple BC517 based RC timer

solution is not mine-one good fella' from Geek zone

[chipco3434]

Hey... I could build thay circuit!

But I would rather just buy the device. Not much pride in DIY industrial supply. Anybody know that Potter & Brumfield line? Searched for a customer service number but I suspect that Tyco has pulled every soul out of that company... just a fax number in cyberspace to receive orders.

To answer your questions, yes, coil voltage should be a simple DC voltage supply. 6-12VDC.

The relay will fire another solid state device... so load rating is miniscule.

[anatech]

Hi chipco3434,
Is there any reason to isolate the trigger from the circuit - the other solid state device? A relay may not be needed, if isolation is required, an optoisolater could be used.

You will be buying a complete circuit for this as there is a timing function. There are some specialized relay-circuits made up, but they are expensive. You want to trip the relay, and have it trip again 3~10 sec later on it's own (how long?). No a common application for a prebuilt. Normally there are timed on. So, push button and the relay stays on for X amount of time.

-Chris

[chipco3434]

Both hits are momentary... a duration of ~ 200mS is required.

The first button push causes a momentary energization followed by a timed delay until another ~200mS energization.

[anatech]

What happens if the button is held down? Do you have to protect against this?