I'm working on a project in which a solenoid valve needs to be triggered when a sensor detects a passing object. I have the concept and general design down, however I need some help with the specifics.
Essentially, a photoelectric retro-reflective sensor will detect an object, send its signal to a relay which in turn will trigger a 24 Vdc solenoid valve.
- The sensor's signal voltage is listed as approximately Uv / < 3V and output current Imax is 100 mA
- The solenoid is 24 Vdc and 8W, with an inrush VA of 25 and hold VA of 14.5
- 24 Vdc power supply is to be used
Question 1: What data do I need to consider (from that listed above or otherwise) when choosing a relay? Specific relay suggestions are welcome :)
Question 2: Once the relay has been chosen and provided its specs suit the sensor and solenoid, is any further circuitry required i.e. a diode for the inductive load etc?
As is probably evident from my questions I'm quite inexperienced in this area so sorry for any ambiguity but thank you, your help is much appreciated!