Dual RFID Reader Weigand 7941d

Dual RFID Reader Module Weigand 7941d 125khz 13.56Mhz
Magnetic Card Keyfob Tag Personnel Tracking Door Entry Control Counter Proximity Em4100 ISO14443A F08 S50 S70

     The dual rfid reader module is a high performance circuit that operates at 125kHz and 13.56MHz frequencies and can read rfid based products such as cards, keyfobs and tags. This module supports common rfid protocols such as EM4100, ISO14443A, F08, S50 and S70, providing reliable performance in personnel tracking, door entry control, counter and proximity applications. 

     Thanks to its compact dimensions, it can be easily integrated into many different devices (e.g. personnel tracking systems, access control devices).  In addition, data output is provided through the module's Wiegand (5 pin) communication interface. With the connection made on the FOR pin, operation in W26 or W34 format can be selected.

RFID Product Selection Information:

     There are 2 types of rfid products, 13.56Mhz and 125Khz. If there are numbers on your cards or keyfobs, your system is 125Khz. If there is no text, it is 13.56Mhz. You need to make your product selection accordingly.

Features:

•   Dual RFID Module Weigand 7941d
•   Operating voltage:  DC 5V
•   Operating current: 40mA
•   Communication:   Weigand (5 pin)   W26   W34
•   Supported protocols:  ISO14443A, F08, S50, S70,  EM4100
•   Rfid frequency:  125kHz  /  13.56Mhz
•   Reading distance: 1-8 cm  
•   Operating temperature:   -10C  /  70C
•   Color: Green
•   Dimensions:  26mm x 46mm x 6.5mm
•   Weight:  7gr

Pin description:

• VCC: Positive input of the operating voltage.
• GND: Negative input of the operating voltage.
• D0: Data output terminal. Data 0.
• D1: Data output terminal. Data 1
• FOR:  OR: Format selection. It is W26 by default. If connected to GND, it operates in W34 format.

Weigand protocol introduction:

• When it detects the card, the serial number is output over the Data 0 and Data 1 data lines.
• When there is no data output, Data 0 and Data 1 are at high level.
• Data Bit 0: Generates a 400us low level signal on the Data 0 line.
• Data Bit 1: Generates a 400us low level signal on the Data 1 line.
• Each data length is 2400us
• Each 13.56mhz card has a 4 byte serial number, users should output the last three bytes
• The first 12 bit even parity bit is added to the front and the last 12 bit odd parity bit is added to the back, forming 26 bits of data in total.
• The example card number is 6B 3D 12 D6 in W34 format.
• The example output data is 3D 12 D6 in W26 format.

Weigand 34 Code if card number is 6B 3D 12 D6:

• 0x00: Even parity bit
• Wiegand 34 if the card number is 6B 3D 12 D6
• 0x00:  Odd parity bit

Weigand 26 Code if card number is 6B 3D 12 D6:

• 0x00:  Even parity bit
• Wiegand 26 if the card number is 3D 12 D6
• 0x00: Odd parity bit

Package contents :

•    1 Piece Dual RFID Reader Weigand 7941d
•     5 Pin cable

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