Hi everyone!
I'm not sure this is a fully PLC question, but I do not know a better place to ask this question!
I am looking to retrofit an old burner controlled with a Barber Colman 560 into a PLC solution. This temperature controller have an output which is described as it : 4 to 20 mA into 0 to 750 ohms. This output controls SCR, and documentations about those SCR is not available.
So my question is, is this 4 to 20mA output a standard 4-20mA output? I do not understand why they wrote .. into 0 to 750 ohms.
Best regards,
I'm not sure this is a fully PLC question, but I do not know a better place to ask this question!
I am looking to retrofit an old burner controlled with a Barber Colman 560 into a PLC solution. This temperature controller have an output which is described as it : 4 to 20 mA into 0 to 750 ohms. This output controls SCR, and documentations about those SCR is not available.
So my question is, is this 4 to 20mA output a standard 4-20mA output? I do not understand why they wrote .. into 0 to 750 ohms.
Best regards,