Hello!
I made a I/O board which is connected to Raspberry PI 2. For outputs I used small signal relays. Power supply for primary and secondary relay sides is the same. Because the switching frequency is not very low I want to replace some of the relays with custom made SSR. The relays are currently switched on and off with ULN2003A which creates a connection to the ground.
I want to make simple PCB that can replace classic relay without changing original PCB. Power supply for the control and switch side is the same so as the voltage, which is 24 V. I will use this to power on some LED's (about 0,5 A) and to put 1 or 0 to the PLC input.
Is there any easy and reliable solution?
I made a I/O board which is connected to Raspberry PI 2. For outputs I used small signal relays. Power supply for primary and secondary relay sides is the same. Because the switching frequency is not very low I want to replace some of the relays with custom made SSR. The relays are currently switched on and off with ULN2003A which creates a connection to the ground.
I want to make simple PCB that can replace classic relay without changing original PCB. Power supply for the control and switch side is the same so as the voltage, which is 24 V. I will use this to power on some LED's (about 0,5 A) and to put 1 or 0 to the PLC input.
Is there any easy and reliable solution?