The document describes a Tap Change Control and Transformer Monitoring System (TCS-TMC) Fx 8000A. Some key features include:
1. It has a large backlit LCD display, 32 binary inputs, 12 binary outputs, 10 4-20mA inputs, and 5 4-20mA outputs.
2. It provides Ethernet, Modbus, optional IEC 103/104 communication protocols and can operate in parallel as a master, follower, or independently.
3. Optional features include GSM for SMS values, GPS for location/time, and disturbance recording. It can record all parameter values and events.