Part of a project I have decided the cheapest way to detect a machine has been switched on is to wire up a US$1.70 230VAC to 12VDC power supply.
Then the power supply gives a low voltage signal to a 4 channel relay bank which will then operate a couple of other items using the relay.
I have received two 4 channel banks off Aliexpress. The inputs are VCC, DN1, DN2, DN3 DN4 GND.
I hooked up 230VAC to the power supply. I hooked up the 12VDC positive to VCC and the negative to DN1 and several others. The LED on the relay bank comes on with the corresponding input. It all goes well but I get nothing on the relay contacts. The NC stays NC the NO stays NO. I have two banks, both do not operate
There is a VCC bridge that looks like it puts the 12VDC straight to one side of the relay. Either with it bridged or not still no result.
I have tried putting a load on the relay side, still no results.
I have tried instead of using VCC put the negative on the GND but nothing happens, no LED, nothing.
Attached is a picture. Has anyone seen these before? I am stumped where I have gone wrong. Either both units are faulty or I am missing something.
Please help. Im not a novice but gee.........
Regards
Boyd
Then the power supply gives a low voltage signal to a 4 channel relay bank which will then operate a couple of other items using the relay.
I have received two 4 channel banks off Aliexpress. The inputs are VCC, DN1, DN2, DN3 DN4 GND.
I hooked up 230VAC to the power supply. I hooked up the 12VDC positive to VCC and the negative to DN1 and several others. The LED on the relay bank comes on with the corresponding input. It all goes well but I get nothing on the relay contacts. The NC stays NC the NO stays NO. I have two banks, both do not operate
There is a VCC bridge that looks like it puts the 12VDC straight to one side of the relay. Either with it bridged or not still no result.
I have tried putting a load on the relay side, still no results.
I have tried instead of using VCC put the negative on the GND but nothing happens, no LED, nothing.
Attached is a picture. Has anyone seen these before? I am stumped where I have gone wrong. Either both units are faulty or I am missing something.
Please help. Im not a novice but gee.........
Regards
Boyd