A Multifunctional Microcontroller Device Which Can be Connected to RS232 Hub

We present a microcontroller device with two slots for chip card reading which can control two electrical locks. It also makes possible two way communication and enables command giving by infra LED's. The same twin lead is used for device supply and for exchanging data with the central computer. The device is intended as a peripheral device for registration and process control purposes in multiprocessor systems with a simple RS232 hub.