HDX FDX-B Long Dstance Card Reader Module

HDX FDX-B Long Dstance Card Reader

1. Introduction

This is a low frequency card reader module based on RFID technology, which supports ISO 11784/5 international standard protocol. It can read all HDX and FDX-B tags remotely. HDX ear tags can be read up to 80cm, read underground pipe labels up to 220cm. The module communicates through UART, and users can read the tag by sending simple commands through UART without having to understand the complex RF communication protocol, it is widely used in the fields of city underground pipeline inspection system, access control system, animal management, abattoir, packing plant and industrial automation.

Fatures:

Working frequency 134.2 khz, strong penetration;

The module supports HDX and FDX-B format labels;

Conforms to ISO11784/85 international standard protocol;

Read the underground pipe label 100CM-220CM (related to the label and antenna) ;

UART communication interface, simple operation;

3.5~5.5 V power supply, baud rate 115200bps;

Module size: 40mm * 80mm * 15mm;

Multiple card reader modules online at the same time nearby without affecting the card reader.

2.Electrical parameters

2.1 limit parameters

Note: working beyond the”Absolute maximum rating” will cause permanent damage to the device. The above does not concern the functional operation of the device under or beyond these conditions. The device can not work under the condition of absolute maximum rating for a long time, otherwise its reliability will be affected.

2.2

Working at temperature = + 25°C. device DC characteristics table

3. the pin description module module pin is defined as follows.

Table 3.1 list of device pin descriptions

3.2 the interface mode and the typical application module communicate through UART, the user only needs to send a simple command through UART to read the label. The typical application circuit diagram is shown in figure 3.2.

4.Communication and protocol specification

4.1 Communication Interface Communication Interface: TTL data format: 1 start bit, 8 data bits, parity bit, 1 stop bit. Baud: 115200

4.2 the Communication Data Module will automatically upload the module status data every 200mS after power-on:

status data (string) : $T + 2B (FDX_RSSI) + 2B (HDX_RSSI) + 1B (synchronous status) + 2BRCC -LRB-not including frame header) + #

for example: $T028F128#

card after entering the field, module to read labels and upload data. If you need to control reading the card, can send antenna switch command. Command string :

open antennna $C+A+#

close antennna $C+B+#

module suppoHDX HDX and FDX-B electronic tags, the format of the signal output data (ASCII) is as follows:

FDX-B plus data (string) : $R1 + 4B country code (high byte first) + 10B hexadecimal card number (high bit first) + 34B hexadecimal data + 2BRCC (not including frame header) + #

FDX-B no plus data (string) : $R2 + 4B country code (high byte first) + 10B hexadecimal card number (not including frame header) + 2BRCC (not including frame header) + #

HDX no plus data (string) : $R3 + 4B Country Code (high bit first) + 10B hexadecimal card number (high bit first) + 2BRCC (not including frame header) + #

for example: $R383E7006581B7C424 #

Note:

With automatic tuning function, the module supports user-made large-size antenna to achieve longer card reading distance, the larger the antenna area, the longer the card reading distance. The antenna material is 0.1 x 500(12-15uH) strands of acetone self-adhesive yarn wrapped, the inductance of the antenna can be adjusted to maximize the working current of the module to achieve the maximum card reading distance (be careful not to touch the wire at both ends of the antenna when the power is on) . Select the power supply should select pure power such as a lithium battery or linear power supply and the system ground AC Earth. When using the switching power supply, the system must be connected to AC ground to filter the common-mode noise of the switching power supply, otherwise it will seriously affect the FDX-B card reading distance.

The mechanical dimensions of the module are shown in Figure