» power supply 11..15V DC, 100mA » identifiers Unique » readout 125 kHz, ASK, Manchester » readout range minimum 5 cm » signallers LED + buzzer » registered events arrival and departure, normal and business » connection to controller RS232 9600 interface » connection length up to 20 m » temperatures 0°C .. +70°C » dimensions 83x144x23 mm » weight 190g » available colours lightgrey, black

bibi-R21

RFID reader with time display

General device characteristics

The bibi-R21 reader is destined for transponder (proximity cards) readout. It works at 125 kHz frequency and reads Unique type transponders with Manchester coding. The reader coopearates with a bibi system controller by sending it card numbers.
The LCD display shows current time (sent from the controller). Employees can use it to display other information from the system like the number of worked-through hours during the month.
The reader has one button which is used to select the type of registered events and signal LEDs (arrows and 'S' symbol) which indicate the current setting. The controller communicates with the reader via 2-wire RS232 interface.
The bibi-R21 reader is designed for indoor installations. It has a durable and aesthetic casing made of ABS material with an external screened cable, which contains all wires used to connect the reader.

Identifiers

The bibi system uses Unique type transponders. Each transponder of this type has its own 64-bit code, which is sent when the transponder is placed in the field of the reader's antenna.
Transponders can have different shapes and sizes. The size of a transponder depends on the size of the antenna used in it. Different sizes of antennas mean different readout ranges. The most popular are plastic cards and key-ring shaped transponders.

Registering events

The reader can register four types of events: normal entrance or exit and business entrance or exit. The type of event can be chosen by pressing the reader's button. The current type is signalled by the LED arrows and 'S' symbol. After the card is placed in the reader's field it sends the card's number and type of event to the controller.
The reader can be configured in a way to allow only entrances or only exits.
If the reader's button is pressed for a longer time, the reader goes into information mode (the display shows the word 'bibi'). In this mode if an employee's card appears in the reader's field information from the system will appear (for example - the number of worked-through hours).

Communication with the controller

Apart from sending to the controller card numbers and receiving controlling commands, the reader systematicly sends its identification code to the controller. This allows the controller to inform the computer in case the connection with the reader is terminated.
A detailed description of the controller along with a connection diagram can be found in the data sheet.