The Keysight DAQM901A is a 20-channel multiplexer module that expands test point capacity within DAQ970A and DAQ973A data acquisition systems. It routes analog signals through configurable 2-wire and 4-wire switching paths, supports simultaneous mixed-mode scanning, and integrates two dedicated current measurement channels. The module scans at up to 80 channels per second and includes a built-in thermocouple reference junction to minimize thermal measurement errors.
Technical Specifications
• Channels: 20 general-purpose multiplexer channels plus 2 fused current measurement channels (22 total)
• Voltage Switching: Up to 300 V
• Current Measurement: Up to 1 A AC/DC on dedicated channels without external shunt resistors
• Scanning Speed: Up to 80 channels per second
• Configuration: Simultaneous 2-wire and 4-wire scanning on single module
• Thermocouple Reference: Built-in junction for thermal gradient error reduction
– Key Features
• Plug-in module format for DAQ970A and DAQ973A mainframes
• Dual switching capability supports voltage and current measurement paths
• Two dedicated channels rated for 1 A AC and DC current routing to internal DMM
• Enables rapid channel multiplexing for high-throughput automated test sequences
– Typical Applications
• Multi-point temperature monitoring via thermocouple arrays
• Sensor scanning and data logging in production test environments
• Mixed analog signal switching for voltage and current measurement campaigns
• Automated test systems requiring expanded channel density
– Compatibility & Integration
The DAQM901A integrates directly into Keysight DAQ970A and DAQ973A mainframes. It operates alongside other series plug-in modules including the DAQM900A, DAQM902A, DAQM903A, DAQM904A, DAQM905A, DAQM907A, DAQM908A, DAQM909A, and DAQM910A, allowing multi-module configurations tailored to specific measurement needs. Each unit includes a Functional Test Certificate.
