Agilent/Keysight DAQM901A

The Keysight DAQM901A is a 20-channel solid-state multiplexer module for integration into DAQ970A and DAQ973A data acquisition mainframes. It delivers flexible multi-function switching with scan rates up to 80 channels/second, supporting mixed 2-wire and 4-wire measurement configurations on the same module. The DAQM901A includes two dedicated, fused current measurement channels rated to 1 A for direct AC and DC current measurements without external shunt resistors, plus a built-in thermocouple reference junction for temperature acquisition.

Technical Specifications

• Channel Configuration: 20-channel multiplexer (2/4-wire) plus 2 dedicated current measurement channels (22 channels total)


• Switching Voltage: Up to 300 V


• Scan Rate: Up to 80 channels/second


• Current Measurement Channels: Two fused inputs, up to 1 A (AC/DC)


• Input Connections: Screw terminals

Key Features

• Supports AC/DC voltage, AC/DC current, 2-wire and 4-wire resistance, and thermocouple temperature measurements


• Mixed measurement modes on a single module eliminate need for multiple cards


• Dedicated current channels eliminate external shunt resistor requirements


• Integrated reference junction simplifies thermocouple compensation


• Compact form factor as plug-in module for DAQ970A and DAQ973A mainframes

Typical Applications

• Multi-channel environmental and process monitoring


• Production test and characterization across voltage, current, and temperature domains


• General-purpose data logging requiring high-density switching


• Mixed measurement systems requiring both resistive and thermocouple sensing

Compatibility & Integration The DAQM901A is a plug-in module designed exclusively for Keysight DAQ970A and DAQ973A data acquisition systems. It requires a compatible mainframe to operate.