Multifunction Module 32-bit DIO, 2-channel D/A and Totalizer for 34980A. The Agilent (now Keysight) 34952A is a multifunction 32-bit digital I/O module for the 34980A multifunction switch/measure unit and offers a great flexibility for a variety of sense and control applications. It combines the following on a single earth-referenced module: Four 8-bit channels of digital input and output 100 kHz gated totalizer Two +/- 12 V analog outputs Standard 50-pin Dsub connectors for use with standard cables, terminal blocks, or mass interconnect solutions