20-Channel Armature Multiplexer - 

DAQM901A is a 20 channel multiplexer (2/4-wire) module for DAQ970A and DAQ973A data acquisition system. This module is the most versatile 20-channel multiplexer for general-purpose scanning. It combines dense, multi-function switching with 80 channel / second scan rates to address a broad spectrum of data acquisition applications. Two- and four-wire channels can be mixed on the same module. Two additional fused inputs (22 channels total) route up to 1A of current to the internal digital multimeter, allowing AC and DC current measurements without the need for external shunt resistors.