Radio Key^® RK-XRM and RK-XRS are proximity card readers that tap the potential of RS-485 communications. Up to 100 units can be connected via RS-485 to a PC for a host-validated system. When a proximity card is placed close to the reader, that card’s ID number is sent in ASCII format to the host. The card ID can be up to 64 bits, allowing for a virtually unlimited number of cards.

RK-XRM and RK-XRS are designed to work with custom software applications developed by original equipment manufacturers and systems integrators. Access control, fuel management, data retrieval and many other RFID applications are possible. An evaluation kit, complete with demonstration software, is available to those who would like to explore the product’s capabilities. For software developers who wish to write an application, an API license is also available.

The RK-XRM and RK-XRS have two user-configured general purpose inputs and a bi-color LED (Red and Green). A solid-state relay is also provided. If so programmed, this relay can either open or close a circuit upon receiving a command from the host PC. The relay is rated at 1 Amp and 60 VAC/VDC. Card IDs, input signals, relay commands and LED operation for all readers are communicated over a common pair of wires.

Installation of the readers is very easy. Two screws mount the RK-XRM to a mullion, masonry wall, post or almost any surface. The RK-XRS can also be mounted to a single-gang electrical box. The readers are fully potted for extreme weather-resistance. Patented Dynascan^®* technology tunes the reader to the environment for maximum performance at all times.  

*U.S. PATENT #6317027