I would like to use the Automation HAT Mini to control a water pump. The pump includes an interface for a PLC that includes two pins that can be used to remotely Start/Stop the pump:
- Pin 1 (Brown) for ‘Common’
- Pin 2 (White) for ‘Digital Input (Start/Stop Signal)’
The ratings for the Digital Input (Start/Stop Signal) on the pump are as follows:
- Voltage Range: 12-24 VDC
- Max Voltage: 30 VDC
- Logic High: > 6.0 VDC
- Logic Low: < 4.0 VDC
- Internally Pulled-Up to 12 VDC
Start/Stop (Full Remote)
- The falling edge of the Start/Stop signal will start the pump. The Start/Stop signal must remain asserted (pulled low) to run the pump.
- Pressing the local Stop button disables the system until the local Start button is pressed.
From what I can tell the Automation HAT Mini can only source 5V - so I will need a separate power supply (e.g., 9V?) to provide the logic signal voltage. What I hoping to get clarification on is how exactly to wire things up.
I was assuming it would look something like:
- 9V(+ from power supply) > Pin 2 (on pump PLC connector)
- Pin 1 (on pump PLC connector) to OUT1 on Automation HAT Mini
- …where do I wire the ground from the power supply…do I wire GND (from power supply) to GND on the Automation HAT Mini?
I am still waiting for delivery of the pump and just want to be sure I get this straight in my head before it arrives. Any guidance/suggestion would be appreciated.