ACCES I/O Products Inc., San Diego, CA offers the Model WM-IIRO-8 wireless 8-bit parallel digital I/O module that features 8 Form C (SPDT) electromechanical relays and 8 optically isolated digital inputs. The intelligent unit communicates with a separate wireless serial modem via a 900 MHz wireless connection and operates at distances up to 7 miles LOS. The modem connects to a host computer's standard COM port using RS-232 or RS-458. Data collected by the module can be stored in local RAM and accessed later through a host PC's serial port. Other features include a microcontroller with RAM and EEPROM and a built-in watchdog timer.
ACCES I/O Products Inc.