NetNathan
Lifetime Supporting Member
I have an IFM Efector 1/4 turn valve limit switch (IN0177). Operating on 115VAC.
Problem:
The PLC input is energized with limit switch not energized.
The Honeywell HC900 PLC input module is rated 80-264 VAC and manual shows minimum "On" current of 0.3 mA and maximum "Off" current is 0.2 mA.
The IFM Efector limit switch manual shows leakage current of <0.8 mA.
I believe the leakage current is energizing the input.
How do I solve this?
A resistor across the PLC input or in series between LS and PLC input
What size?
I have test wired in a relay (instead of the PLC input) and it works correctly.
Problem:
The PLC input is energized with limit switch not energized.
The Honeywell HC900 PLC input module is rated 80-264 VAC and manual shows minimum "On" current of 0.3 mA and maximum "Off" current is 0.2 mA.
The IFM Efector limit switch manual shows leakage current of <0.8 mA.
I believe the leakage current is energizing the input.
How do I solve this?
A resistor across the PLC input or in series between LS and PLC input
What size?
I have test wired in a relay (instead of the PLC input) and it works correctly.
Last edited: