The Unitronic V130-33-R34 Vision130 Programmable Logic Controller + Integrated HMI features 20 digital inputs, 2 analog/digital inputs, 12 relay outputs, RS232/485, 24VDC. Palm-size, powerful PLC with built-in black and white LCD 2.4″ graphic display, keypad, onboard I/O configuration. Expands up to 256 I/Os.