13.56MHz 125KHz Dual Frequency RFID Reader Wiegand RFID Module for IC/IDCard
Description:
7941D is a RFID reader module.It integrates high performance RF circuits and antennas.Built in buzzer and LED indicator.It can support to read ID and IC card.
Parameters:
1. Item Name: 7941D RFID Read Module
2. Work voltage:DC 5V
3. Work current:40mA
4. Read frequency:125KHz and 13.56MHz
5. Communication Interface:Wiegand(5pins)/UART(3pins)
6. Read distance:about 8cm(For EM4200 Card)
7. Read distance:about 5cm(For S50 S70,Desfire,FM1208 Card)
8.Work Temperature:-20ºC~80ºC
9.Work Humidity:0%~95%RH
10.Size: 47x26x5mm
Interface Description:
1. VCC:Input for positive of work voltage.
2. GND:Input for negative of work voltage.
3. D0:Data output terminal.Same to DATA0.
4. D1:Data output terminal.Same to DATA1.
5. FOR:Format selection.Default W26.It is W34 format if connect to GND.
Wiegand Protocol Introduction:
1. When it sensors the card, the serial number will be output via Data 0, Data 1 two data wire
2. Data 0 and Data 1 are high level when there is no data output
3. Data Bit 0: it will generate 400us low level on Data 0 wire
4. Data Bit 1: it will generate 400us low level on Data 1 wire
5. Every data length is 2400us
6. Every card has a serial number with 4 bytes, users should output the last three bytes
7. Add the first 12-bit even check bit in the front and add the last 12-bit odd check bit in the back, 26-bit data in total
8. Card number is 6B 3D 12 D6 for W34 fromat
9. Output data is 3D 12 D6 for W26 fromat
10. Weigand 26 Code
Wiegand 34 Code if card number is 6B 3D 12 D6:
1. 0x00:Even Check bit
2. 6B 3D 12 D6:Card number
3. 0x00:Odd Check
Wiegand 26 Code if card number is 6B 3D 12 D6:
1. 0x00:Even Check bit
2. 3D 12 D6:Card number
3. 0x00:Odd Check
Application:
1. Attendance
2. Access control
3. Industrial control
Note:
1. It just need three wires.
2. Module just can send data.
3. User need write code according to UART Protocol Introduction as shown.
4. Please stay away from interference sources.
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