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Old June 13th, 2018, 07:17 PM   #18

brendan.buchan is offline
Join Date: May 2010
Location: Melbourne
Posts: 451
I'll throw in a suggestion for an Allen-Bradley Micro 820 2080-LC20-20QWB.

Pretty cheap, looks to be around $250 USD in the states, with free programming software (CCW) supporting Ladder, Function Block, and Structured Text.

On-board serial port RS232/RS435, and Ethernet port for Ethernet/IP or Modbus/TCP.

Also has on-board analogs as well as the digital in/relay outs of course.

Pair this with some free HMI software like AdvancedHMI and you can learn quite a bit with this setup that directly relates with industrial environments.
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