JMY505 series are RFID reader/writer module with UART and IIC serial ports. JMY505 has various functions and supports multi ISO/IEC standard of contactless card; the cards from different suppliers. The RF protocol is complex. But the designer combined some frequent used command of RF card and then user could operate the cards with full function by sending simple command to the module through IIC or UART interface. And the module and antenna are separate design. The impedance between RF module and antenna was tuned by impedance analyzer. And then the module has excellent performance and stability. The module and antenna is linked by 50ohm coaxial line. The performance is good, though the wire can reach 10m. Normally the wire should be 60cm that is the module's best performance and stability.

    Qualifications:
     Model Number:JMY505A,JMY505C,JMY505G,JMY505H
     PCD: MF RC500, RC531, RC632, RC400
     Working frequency: 13.56MHz
     Antenna connection: by 50ohm coaxial line, (recommend 60cm, Max. 10 meters), due to order
     RF standard: ISO14443A, ISO14443B, ISO15693
     Operating distance: 100mm(depending on card and antenna design)
     Anti collision ability: Full function anti collision; be able to process multi-cards simultaneously; be able to set operate single card only
     EEPROM: 512 Bytes
     Interface: IIC & UART (selected by SPS pin, recommend to use IIC)
     Communication rate: IIC--400Kbps, UART--19.2Kbps/115.2Kbps
     Max.command length: 511 Bytes
     Interface level: 3.3V(TTL level; 5V tolerance)
     Power supply: DC 5.0V
     Power consumption: 70mA
     Dimension: 42mm×21mm×8mm
     Package: DIP32
     Weight: about 15g
     Operating temperature: -25 ~ +85 ℃ (-77 ~ +185°F)
     Storage temperature: -40 ~ +125 ℃ (-104 ~ +257°F)
     ISP: Supported
     RoHS: Compliant

Antenna connects to the module by 4 wires.
TX500, size: 70mm*70mm, 90mm reading range
TX501, size: 50mm*50mm, 70mm reading range
TX502, size: 30mm*30mm, 60mm reading range
Any requirements is available.