Part Number: DRV8844
We need your advice for our PLC control unit that is used to operate several hydraulic solenoids.
Our case and requirements are as follows:
We have analog controlled solenoids that operate with (2 to 28 volts DC) & (0.3 to 2.5 amperes).
We need to control the above mentioned solenoids using analog PLC that gives output signal (0 to 10 Volts DC) or (4 to 20 milli ampere)
So we need a solenoid driver to operate our solenoids modulation using the PLC signal output.
We got your DRV8844 and we connected it as follows in a circuit:
- We connected a 0.01 micro farad (100 V) capacitor between CP1 &CP2
- We connected a 0.47 micro farad (6.3 V) capacitor between V3 P3 out and VNEG
- We connected a 0.1 micro farad (16 V) capacitor between VCP and VM
- We connected 10 micro farad (50 V) capacitor between VM & VNEG
- LGND with the negative output signal from our PLC output
- 1N1 with the positive output signal from our PLC output.
- Out 1 to the negative pole of the solenoid relay.
- VM to the positive pole of the solenoid relay.
- Power supply to the driver positive to the VM negative to the VNEG (24 volts power supply)
After trying this setup didn’t give us our requirements.
We need to know if these connections are correct.
Also we need your advice if this any further components or additions needed for the setup to achieve our requirements.