OleumTech Corp., Irvine, CA, now offers analog input, digital I/O, and multi-I/O WIO wireless I/O modules that let you add additional I/O without needing a secondary WIO wireless gateway. Available in 900 MHz or 2.4 GHz options, the modules communicate with the primary wireless gateway as point-to-point end nodes attached to field devices for pressure monitoring, wireless valve control, emergency shutdown, mirror I/O, triggering alarm, and other mission-critical process monitoring and control applications. The analog input module has 4 analog inputs that accept 0–10 V or 4–20 mA signals and are independently selectable. The digital I/O module offers 6 discrete/digital channels for mixed I/O. The multi-I/O module includes 4 analog inputs, 4 digital I/O, and Modbus Master functionality. Range is up to 40 miles.