Using the proven Terminator field I/O hardware as a platform, AutomationDirect’s Do-more T1H Series PLC supports stackable base units, discrete and analog I/O modules. The T1H CPU’s high processor speeds not only decrease program execution time, but also allow the CPUs to support Ethernet connectivity and custom communication protocols as built-in functions, the company says. A Do-more T1H CPU supports up to 256 I/O points in three stackable rows. The I/O Configuration window performs full auto-discovery of all I/O modules in the local drop, simplifying system configuration. For larger applications, Ethernet-based remote I/O can be connected for hundreds of additional points. The CPUs are programmed using Do-more Designer software, version 1.2.1 or later, and can be downloaded free of charge. The Do-more T1H PLC provides an advanced instruction set to reduce programming time, superior memory mapping to improve data management, and data structures to simplify initial programming and long-term software maintenance, according to the company. Do-more Designer’s built-in simulator creates a virtual PLC so logic can be tested without a PLC present. The tool simulates discrete and analog I/O with access to timers, counters and control bits, as well as the PID function.