switching device
switching device
(OP)
Apologies if this duplicates an earlier request.
Require a four input one output solid state switching device that switches on only when all inputs (120vac)are present and remains on when all or only one input is present and switches off when no inputs are present.
If someone can direct me to a manufacturer of such a device (with model numbers) will be really really grateful.
Require a four input one output solid state switching device that switches on only when all inputs (120vac)are present and remains on when all or only one input is present and switches off when no inputs are present.
If someone can direct me to a manufacturer of such a device (with model numbers) will be really really grateful.





RE: switching device
To clarify, the four input signals are 120vac, and the output is what? A dry contact? Or 120vac?
RE: switching device
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RE: switching device
Output can be either a dry contact or 120vac
Thought maybe someone manufactured a programmable plug in
DIN rail mountable device.
Salesman from SSAC said only option he could think of would be a micro PLC.
RE: switching device
One latching output relay with four input relays. One set of contacts from each input relay in series with the coil of the output relay performs the AND function.
One set of contacts from each input relay in parallel with each other and in series with the latching contact of the output relay will keep the output latched until all input are off.
RE: switching device
The only clarification needed is that the latching relay will need its own separate power supply, OR additional circuitry (perhaps switching and logic) would be required to chase the available 120vac across the four inputs.
RE: switching device
terrific suggestion and will probably use your idea.
problem is space considerations...was hoping someone made a programmable plug in miniature device....but guess not.
RE: switching device
"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: switching device
many belated thanx for info