The Agilent 34907A Multifunction Module for the 34970A Data Acquisition/Switch Unit allows great flexibility for a variety of sense and control applications. The 34907A combines two 8-bit ports of digital input and output, a 100 kHz gated totalizer, and two ±12V analog outputs - all on a single earth-referenced module. The digital inputs and totalizer input may be included in a scan. Alarm limits for the digital and event counter inputs are evaluated continuously, capturing and logging alarm conditions even between scans.