Thyro-A is a ready-to-plug-in digital thyristor controller with the following operating modes: full-wave cycle principle (Thyrotakt), phase-control principle (Thyrovar) and Quick-Takt-Mode QTM (for 1-phase devices). Product features include an integrated semiconductor fuse, bus interface, and optional power regulation as well as many monitoring functions and a mains load optimizing feature (via Thyro-Power Manager or directly in QTM operation mode). It can be operated as a stand-alone system or in combination with process controls, PLC, or automation systems via various bus interfaces (Profibus-DP, CANopen, DeviceNet and ModBus RTU).