Industrial Shields Ardbox Relay Series PLC I/O Module, 12 → 24 V dc Supply, Relay Output, 8-Input, Analog,

The Boot & Work Corp S.L connectable PLC Arduino module with stored program method. It has 8 number of inputs. It uses USB only for uploading or debugging.

Combination of the cyclic scan and immediate refresh processing I/O control method
Programming language Arduino IDE
ATmega32U4 microcontroller