Intelligent data terminal for road vehicle system - has optical or infrared link in communication with on-board system for personal computer secured data

摘要

The intelligent data terminal can communicate via an optical fibre or infra red link (51) with the on board system or with a P.C. The terminal has a CPU (31) coupled to RAM/EEPROM memory containing the operating system and data. Entries may be made through a keyboard (57) and the unit has a display (58). A power failure is detected by a circuit (54) and back up is provided by a battery and solar cell (55,56). ADVANTAGE - Wear free interconnection. Protected against unauthorised access.