cheap discrete i/o via Modbus tcp or ethercat or other?

[ganutenator]

cheap discrete i/o via Modbus tcp or ethercat or other?

 

[boneless]

For what purpose?

You can use the GPIO of an Arduino.

If you need something permanent, you can look at WAGO and BECKHOF

 

[RussB]

Cheap is subjective.
Check out Turck BL20. https://www.youtube.com/watch?v=XmqVRhV_7_g

 

[diat150]

ive had good luck with advantech adam remote io.

 

[Archie]

Click PLC without a program actually makes a cheap Modbus IO

 

[Firejo]

Cheap comes out expensive

 

[Stephen Luft]

Greetings,

Much will depend on how many I/O you will require, but you may want to consider Triangle Research and their embedded Ethernet PLCs A base unit starts at 8 in / 8 out and there are digital expansion boards available.

The controllers incorporate Modbus as a communications protocol for Ethernet and supports both Modbus server and Modbus client.

More information is available through the following link:

http://www.eternity-sales.com/tri-plc/tri-plc.htm

Disclosure - ESI is an authorized Triangle Research distributor.