24v input signals to be monitored

Projects General Guidance
1

Hi everyone

I want to make something for a scenario

"we have a machine in Factory that has status tree light (24v) coming from PLC.

For example if machine stops red light will be turned on
if running green light.

It has 4 status light, so 4 of 24v input signals coming from PLCs.

I want to design something and put in the Electrical cabinet of the machine that can let me see those 4 status of machine in office which is almost 200 meters away.

Please guide, Thanks in advance

2

Get the plc outputs to drive relays and run the wires from the contacts to your Arduino .use something like a 1k pull-up resistors for good noise immunity , and something like cat 5 cable.

3

@hammy
Sounds sound. Or using opto couplers? Using a voltage divider 1K + 4,7K is of course more noice sencitive.

4

Or a bit more complex, register using a voltage divider and an arduino (or ESP) in the circuit board, and digitally send it to the office. ESP you could monitor via wifi. Serial communication using a low BAUD rate you could cross those 20m not problem as well.

5

Normal practice is the use of PLC interposing relays anyhow on standard outputs.