Hi!
Attached is a draft schematic of a circuit that I have in mind. I want to drive a DIN power relay (for example the A9C21732 contactor (220VAC, 25A) from Schneider-Electric or some other similar part and I'll build a PCB with a uC to control it. On the PCB I'll put a solid state relay, the output of which will drive the power relay. My question is, what SSR should I choose to correctly drive the power relay? The maximum output current of the SSR is my main concern. Does the power relay have any specific coil drive current specification that I should have in mind? How much coil current is needed to be activated?
Attached is a draft schematic of a circuit that I have in mind. I want to drive a DIN power relay (for example the A9C21732 contactor (220VAC, 25A) from Schneider-Electric or some other similar part and I'll build a PCB with a uC to control it. On the PCB I'll put a solid state relay, the output of which will drive the power relay. My question is, what SSR should I choose to correctly drive the power relay? The maximum output current of the SSR is my main concern. Does the power relay have any specific coil drive current specification that I should have in mind? How much coil current is needed to be activated?