The Davis Derby Hazardous Area RAPID 2000EX system provides the solution to the problem of positively identifying objects, vehicles or personnel which carry a radio transponder within a hazardous area. The system is specifically designed for use in Group 1 and Group 11A or 11B hazardous areas where due to the certification requirements conventional identification systems are not permitted to be used.

The system utilises Radio Frequency Identification and Detection (RFID) technology to automatically identify the object as it comes into range of the antenna. The RF signal does not depend upon line of sight for a positive read, is not affected by dust and dirt and as the signal is low frequency it can pass through non-metallic materials. The information from the reader can be stored and processed locally or can be passed to a host PC over a certified transmission system via a modem barrier interface for processing.

The passive transponders are packaged in a variety of forms to suit the particular application and with the selection of the appropriate certified antenna a fully functional RFID system can be designed to meet the specific requirements of the application such as;

• Manpower/Vehicle Logistics

• Belt Joint Monitoring

• Container/Bin Tracking

The flameproof reader is supplied in a fabricated enclosure consisting of a flameproof compartment housing the reader module and associated power supply, a second compartment is intrinsically safe and contains an interface pcb, a processor and a modem pcb. An optional keypad and LCD display can also be fitted into this chamber to enable the system to be configured or the transmission status to be checked locally at the reader rather than at the controlling PC.

For Group 1 applications transmission is conducted over a 4 wire opto coupled FSK system, for Group 11 applications an opto telemetry system is used. The transmission system links into the controlling PC which can operate dedicated software packages such as the General Purpose Monitoring and Tracking System which can be used in both Group 1 and Group 11 applications or the localised POB 2000 (Personnel On Board) system designed specifically for use in the oil and Gas industry. The RAPID 2000Ex system can also be configured to operate on the widely used MAPS (Movement and Personnel System) logistics system.

Specification

Applications - Equipment Selection Guide

	EExia Transponder					EEx m Antenna
Hazardous Area Application	Credit card	Tax Disc	Mini Disc	Glass Bead	Vehicle		Wall Mounted	Hose Antenna	Walk Through		EEx d Reader
Vehicle Logistics
Asset Tracking
Manpower Logistics
Container/Bin Tracking
Belt Joint Monitoring

 

System Layout - How RFID Works

The intrinsically safe radio frequency transponder attached to the object contains the coded information, a unique 64 bit ID number in the case of Read Only or 1024 usable bits in the case of Multi-Page read/Write. As the transponder comes into range of the antenna the RF transmission generated by the reader is used to charge the energy storage components within the transponder to allow the stored information to be instantly transmitted back to the reader. The power of the transmission is restricted to within the required limits of radio signals within a hazardous area. In the case of Read/Write transponders new information can be programmed within this cycle. Typical read cycle is 120m seconds.