The Human Machine Controller from Maple Systems combines an HMI and PLC in one unit. With customizable input/output, the HMC accepts up to five plug-in I/O modules with varying configurations of digital and analog inputs and outputs. The unit is available with a 3.5-in. or a 5.7-in. touchscreen display, each equipped with six function keys adjacent to the screen. One software application programs both the graphic interface and the ladder logic for improved performance and efficiency. In addition to offering a standalone solution, the HMC can integrate with an existing system serially and supports many popular communication protocols.