Contrinex high frequency RFID technology (13.56 MHz) is ISO/IEC 15693 compliant and therefore not limited to a specific manufacturer’s transponders. Up to 253 R/W modules can be connected directly to an RS485 network. Fieldbus interfaces are available for connecting up to 32 RWMs. A Contrinex USB adaptor can connect a network of up to 10 RWMs for direct control by a PC. RWM address is selectable by potentiometer, or programmable with ConID HF software. Tags have 160 bytes of user memory in 40 blocks of 4 bytes each. Memory blocks can be password protected and an anticollision algorithm allows each RWM to recognize up to 5 tags. Read/write distances extend to 60 mm.