The PanelView Plus 400 terminals are HMI devices with Color or Grayscale Operator Interface Displays. The Units offer keypad or keypad and touch screen input. The Base-configured units offer RS-232 communications. These Communication modules provide add-on capability to the modular communications interface. The Power input can be AC or DC. The Compact Flash card slots support Type 1 Compact Flash cards. These Modules include USB ports for attaching a mouse, keyboard, printer, bar code scanner, and other devices. They have the same panel cutouts as the PanelView Standard 550 terminals.