RFID products
Products – Micro RWD EM4102
  Low-cost proximity RFID reader module supporting EM Marin EM4102 and compatible
Manchester read-only transponders/tags (for example: Sokymat Unique tag).

The module is completely housed within a 24-pin DIP package (pin compatible with
other modules) and only requires a 5v supply and a 700 micro-Henry antenna coil to
be a fully featured reader and tag acceptance system.

The RWD module has outstanding RF drive capability and has a read/write range to
ISO card size tags of up to 20cm whilst maintaining reliable communication and high
resilience to EMC corruption. This has been achieved through the RWD continuously
self-tuning to allow for inductive changes in the RF field and extensive software/hardware
filtering.

   

 
The RWD module has a TTL level RS232 interface that allows a host system to send and
receive easy-to-use optimised commands/data (for example: Ascii “R” command to read
tag serial number).

The RWD also has internal EEPROM memory for holding system parameters and lists of
authorised serial numbers,a manual override switch facility and supports direct LED drives
to give visual indication of acceptance. Up to 100ma of drive current is also provided as
an output that can be used to switch external loads.

Download Micro RWD EM4102 data sheet

Different versions are available which use the spare I/O pins to output data as clock/data
signals orWeigand protocol signals (in addition to standard TTL RS232 interface).

Download Micro RWD EM4102 (BCD format clock/data output)

We can customise RWD interface and features for your application, contact us for
more information

 

  
Parameter
Typical Value
Supply Voltage 5v DC
Operating temperature -25 deg C to + 70 deg C
Average current consumption with default polling cycle delay 20ma
Peak antenna voltage (tuned with optimum Rant = 31.5) 110v
Peak current (Antenna tuned with Rant = 31.5, Ra = 22 R)

(NOTE RF IS NORMALLY OFF AND IS ONLY TURNED ON DURING TAG COMMUNICATION RESULTING IN VERY SHORT BURST OF UP TO 200MA CURRENT CONSUMPTION)

 200ma max
Communication time for reading 40 bit serial number 20ms
Maximum data rate (between Tag and RWD) 4k bits/sec
Range (dependent on antenna dimensions) Up to 20cm
Output relay drive Up to 100ma sink
Switch input (pulled up) Active low
Serial Interface TTL level RS232
Communication Parameters 9600 baud, 8 data bits, no parity, 1 stop bit protocol
with CTS (BUSY) handshake
   
       
Micro RWD EM4102
click on the image to
enlarge
 
   

 
   
EM4102 tag has 8 bytes of read only memory (factory programmed)
of which 5 bytes are available to user.		  
   
     

Copyright IB Technology (Eccel Technology Ltd, registered in England No. 5614911)
Registered Office: PO Box 747, Aylesbury, Buckinghamshire, HP22 9BG, UK.
Site last updated 12th February 2008