The TR-530 scans transponders without contact via 125Khz basis. The transponder ID is read with subsequent time stamp. The device has a port to connect to an external alarm system and a port for automatic unlocking of the door buzzer. The device is controlled with RS232 or with a serial to Ethernet converter DS-100 via the network. Data loss is impossible, even if there is a loss of power. The device can store up to 10,000 entries and has 8 freely programmable function keys as well as 28 freely adjustable time zones for activation of the security system alarm.