The FD-RB01 and FD-RB02 are card reader modules which can read and write data to MIFARE® contactless cards with the following characteristics: ♦ Able to energize MIFARE® cards at 13.56 MHz at a distance of about 2 cm from the antenna (antenna is located bottom center of the reader) ♦ Able to read and write data on MIFARE® cards ♦ Communication with cards that carry data encrypted according to the MIFARE® protocol ♦ Read data registration (entry/exit) by means of photo sensors on the left and right of the reader ♦ Visual indications through 2 multicolored LEDs (red/green/yellow/blue) in the little arrow symbols on either side of ♦ Indication of a field present by sequential illumination of the blue wave symbols on either side of the reader ♦ Audible signal through an internal buzzer ♦ Connection to the FD-BUS using SPP (Serial Proprietary Protocol) at a speed of 115.2 Kbaud (default) or 19.2 ♦ Address selection for the reader by means of a rotary switch on the back of the device ♦ Double connector (internally in parallel) for easy reconnection to the FD-BUS. ♦ Display of alphanumeric information on an LCD display, on 2 rows of 16 characters with BLUE backlight ♦ Automatic disabling of the display backlight to save energy when operated from the battery The equipment is protected against the following events: ♦ polarity reversal on the cables (RJ45) connecting to the FD-BUS ♦ voltage surge in the power supply and data lines