10 I/Os PLCs with Arduino NANO Industrial Shields 10 I/Os PLCs with Arduino NANO operates from 12VDC to 24VDC input voltage range and offer 220VDC digital isolated output. These modules feature polarity protection, fuse protection, and does not support reverse polarity. Specifications include 30W rated power, 16MHz clock speed, and 32KB flash memory out of which 4KB is used by bootloader. The 10 I/Os Arduino Nano module supports RS485, Ethernet, and USB communications however the USB is only for uploading and debugging. Typical applications include elevator control, alarms, product lines, full HVAC solutions, and much more.