1. General

Radio Frequency Identification RFID is the acronym for radio frequency identification, commonly known as RFID. Radio Frequency Identification RFID is a non-touch automatic identification technology, radio frequency signal through the automatic target recognition and access to relevant data, to identify without human intervention, it can work in a variety of harsh environments. RFID technology can identify the high-speed moving objects, also identify multiple tags, the operation is quickly and conveniently.

Shenzhen eTel technologies co., ltd. according to market demand of the wireless internet of things RFID, Combine with GPRS FAM function, develop ET7241RFID GPRS Reader, it able to real time send RFID TAG information via the GPRS network to data center. Data center platform will receive the data and save into database, users can just use browser to access data and view all information.

ET7241RFID Reader is mainly used in schools, residential security, plant access, government access control, automotive systems, ET7241 RFID Reader also support FAM feature, which supports 3 DI, 1 DO, 1 AI, 2 TE ports, it can be connected to different sensors to cooperate with RFID function.

2. Feature

·           Industrial Design

ET7241 RFID Reader is industrial design which built-in watchdog chipset to ensure the system work continuously, Watchdog monitoring the GPRS module and CPU all the time, if the GPRS module or CPU does not response for long time, Reader will restart automatically. Reader is very suitable for long-term continuous work applications.

·           Main and backup data center

ET7241 RFID Reader support main and backup data center, user can set both main data center IP address or domain name, when Reader  fail to connect with main data center, it will try to connect backup data center automatically.

·           TAG buffer

ET7241 RFID Reader can save the TAG card information in the NVRAM buffer, if the GPRS network is abnormal, the reader will save data in the NVRAM, when the network returns to normal, the data will be sent immediately. NVRAM has feature for save data even power lose, so even reader power lose, Tag data will still save in the NVRAM.

·           Embedded Li-battery and Temperature sensor

ET7241 RFID Reader built-in 1000mA Lithium battery, it can work for 3 hours if the external power supply cut off. The built-in temperature sensor can real-time monitoring of environment temperature, and the outside TE port can be extended to the user device surface to monitoring equipment temperature.

·           SMS Remote Restart

ET7241RFID reader supports SMS remote control, users can query the device working status through SMS, also user can reboot reader through SMS.

·           Graphical configuration software

ET7241 RFID Reader provides full graphical software configuration, easy to use, and supports import or export configuration file; so users just simply click a few icons to quickly setup RFID system.

3. Specifications

Basic

• GPRS Dual Bands 900Mhz/ 1800Mhz
• GPRS Quad Bands 850/900/1800/1900Mhz (Optional)
• CDMA 800mhz (Optional)
• Dual SIM Slot (Optional)
• TAG data buffer
• Smart power management
• Automatic power supply detection
• Li-Battery inside
• PC based configuration tool
• Real time OS, steady system
• Watch dog design, ensure reader alive
• Low consumption, industrial design
• Fully type approved with ETSI GSM Phase 2+ standard
• Enhanced EMC/EMI design

RFID

• Frequency: 2.4GHz--2.5GHz ISM
• Identification Directionality: Non-directional or directional（antenna dependent）
• Antenna: Connect 1 antenna through SMA
• Max RF Power: 0dBm
• RF Power Range: -20dBm-0dBm(adjustable through software)
• Receiving Sensitivity: -90dBm
• Operating Method: Fixed frequency(set via software)
• Modulation: GFSK
• Identify Tag Time: Less than 1ms when identify single tag.
• Reading/Writing Tag Time: Less than 0.5ms every 9 bytes when reading, 1ms every 13bytes when writing.
• Reading/Writing Tag Range: More than 60m when reading, 70% of reading range when writing(antenna dependent)
• ID-matching Time: The longest ID-matching time is 460us when 2000 ID.
• Reading distance can be adjusted from 0-60m by changing the RF power;
• Anti-collision, can identify 100pcs of tags in the same time;

GPRS

• Industrial class GPRS wireless module
• Embedded PPP, TCP/IP Stack
• Support main and backup service center
• Support TCP/IP and UDP/IP
• Supports DNS and dynamic data service center IP address
• Support continually or sleep work mode
• Support Carrier public & special APN
• Remote monitoring and control

Interface

• GPRS Antenna: 50Ω/SMA Female;
• RFID Antenna: 50Ω/SMA Female or embedded antenna
• SIM/R-UIM: 3V
• Configuration: RS232
• Data Communication: RS232 (RS485 Optional)
• DI: 3 Ports (0-3V False, 3-36V True)
• AI: 1 Port
• DO: 1 Port
• TE: 2 Ports

Note: DI = Digital Input

AI = Analog Input

DO = Digital Output

Power

• Voltage: DC 12V -18VDC
• Consumption: 400mA@ DC12V

Others

• Dimension: 116mmx154mmx26mm
• Weight: 350g
• Operation temperature: -45~+75ºC
• Storage temperature: -50~+85ºC
• Relative humidity: 95% (no-condensing)

4．Applications

ET7241 RFID Reader products can be used for many industrial applications, such as:

• Auto-identification and tracking of important goods in logistics;
• Edu to Home in students management;
• Attendance, access control, convention registration etc;
• Intelligent management in traffic police, patrolman etc;
• Orientation, tracking and checking people in coal mine etc.
• School access system

5．Topic diagram