Please note: Wiegand is sent by default, please contact customer service in advance if you need UART.

 

1.Description:

7941E card reader module, integrated high performance card reading radio frequency circuit and antenna and users can select wiegand or UART interface. Rich application support, it supports various cards card reading operation

 

2.Features:

1>. Voltage: DC 5V

2>. Current: 40mA

3>. Support 125KHz card reading

4>. Interface: Wiegand, UART

5>. Size: 47*26*5mm

6>. Operating Temperature: -20~70 Celsius

7>. EM4100 Card Reading Distance: >8cm

 

3.Connection Introduction:

1>.Power: DC 5V power supply, choose linearity power can gain better effects

2>.D1 D0: wiegand data output DATA1, DATA0

3>.FOR: format selection (hanging means W26, ground connection means W34)

 

 

1. Wirgand Interface Output 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 Mifare 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

9>.Output data is 3D 12 D6

10>.Weigand 26 Code

0	111101	10010	11010110	1
Even Check	3D	12	D6	Odd Check

 

11>.Weigand 34 Code

Weigand 34 Code
0	1101011	111101	10010	11010110	0
Even Check	6B	3D	12	D6	Odd Check

 

12>.UART Interface Output

UART Interface Output
Data Head	Length	Card Type	Card Type	BCC Check	Data End
0x02	0x09	0x01	SN0~SN3	XOR Check Except Data Head And Data End	0x03

 

13>.Card Type:

0x02  EM4100

0x01  MIFARE 1K

0x03  MIFARE 4K

0x10  HID Card

0x11  T5567

0x20  2nd Card

0x21  ISO14443B

0x22  FELICA

0x30  15693 Label

0x50  CPU Card

0x51  Sector Information

0xFF Keyboard Data

For example: the data received by serial port tool is 02 0A 02 2E 00 B6 D7 B5 F2 03, then

The first byte 0x02 means data start
The second byte 0x0A means the whole data length is 10 bytes, which includes data start and data end

The third byte 0x02 means the card type is EM4100

The fourth to eighth byte (0x2E 0x00 0xB6 0xD7 0xB5) means the read card number, and the fourth byte 0x2E is hidden card number

The ninth byte 0xF2 means BCC check of second byte to eighth byte

The tenth byte 0x03 means data end

 

5.Notice:

Keep away from interference source, and strong interference signal may affect card reading

Select linearity power can improve the card reading distance and effect; switch power may attenuate the distance but will not influence normal operation

The module can operate normally in the range of 3-5V, please do not use higher voltage

This module has high frequency signal, so it may cause some interference to the analog circuit. Uses should place the module a little far away from the buzzer; if the distance is too close, the sound of the buzzer will be low

 

6.Applications:

1>.Attendance Fingerprint Read Write Module

2>.Entrance Guard Intercom Read Write Module

3>.Replicator

4>.Attendance fingerprint card reader module

5>.Entrance guard intercom card reader module