Help with interval power controller

[Looking9]

Hi everyone,
I need a power controller for an equipment. The power supply for the equipment is 9V DC which is transformed from 110 AC. I need to control the power like following: 1 "ON" for 1 sec to 60 sec(adjustable) 2 "OFF" for 1min to a couple of hours(adjustable). 3 Repeat step1&2 up to 48h.
EE is not my major, so I need to buy a commercial ready one to do this. Shall I control the DC or AC?
Anyone who can give me any suggestion will be highly appreciated.

Thanks in advance.

 

[itsmoked]

Look at some of these. See if they meet your needs.

http://www.alliedelec.com/catalog/pf.aspx?FN=1309.pdf

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[Looking9]

Thanks a lot, itsmoked. I checked that page and I could not understand how the Time-Delay Relay works because my background is biology and somehow related to bioengineering. My question is: 1 Can I use a single time-delay relay to control the time range of both "ON" and "OFF"( like model P&B CNT Type 12-Function Digitally Programmable Time-Delay Relay/Counter)? 2 Do I need a Twin Setting Repeat Cycle Timer like this:

http://www.attr.com/x10/a4183.htm(

I googled time-delay relay and found it, however it is not the right time range which I need)

Many thanks again.

 

[itsmoked]

Hi Looking9.

You need to be a little clearer in you specification.

Can the timer be run from 120VAC? (expunge 110 from your vocabulary)

You generally discuss this stuff from the point of view of one 'state'. If what you are after is 'ON' periods you stick with talking about the ON periods only. The OFF periods will follow along like a good doggy.

We need to be precise. Lets try this description.

Needed:
A triggerable timer that closes some contacts for an adjustable period of time, 1-60s.

This timer also needs to be triggered over an adjustable period of time 1min to xhrs.

The contacts need to carry what? 9VDC? 120VAC?

Are these values going to both need constant adjustment, or set and forgotten?

Is the long period timer going to be triggered by some event or just "free run"?

We need the "x" hrs number as the 'couple of hrs' period you mention lies in an area where a lot of conventional timers start to choke.

What kind of process is this for? It might make a difference on suggestions.

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[Looking9]

Hello Keith,
Thank you so much for your reply.
1Your last question first: I want to control a mini pump through the power on and off. I want the pump work for from 1 sec to 60 sec and stop for xhrs. The pump just repeats work and stop for 48hs.

2 "Are these values going to both need constant adjustment, or set and forgotten?"
I want to find a suitable time to run the pump, therefore, each time I chose a time value for ON and a time a value for OFF and then I let it run. The values don't need to be adjusted in the process but should be adjustable for setting up each assay at the beginning.

3"Is the long period timer going to be triggered by some event or just "free run"?"
Just FREE run

4 We need the "x" hrs number as the 'couple of hrs' period you mention lies in an area where a lot of conventional timers start to choke.

I cannot say the exact number of X because I won't know until I try it and also it may change in different assays. However, If you think it will be hard to find a good conventional timer, I would say 2 hours might be good for me to start to try. I want the whole cycle period to be 48 hrs.

I really appreciate your help.

Best Regards

Yonggang