The Keysight DAQM902A is a 16-channel multiplexer module engineered for integration into DAQ970A and DAQ973A Data Acquisition Systems. It enables sequential scanning of multiple test points via reed relay switching technology, supporting both 2-wire and 4-wire measurement configurations on the same module. The unit scans up to 250 channels per second, making it suitable for automated testing, high-speed data logging, and process monitoring applications where instrumentation consolidation and measurement efficiency are critical.
Technical Specifications
• Channels: 16 (configurable as 2-wire or 4-wire; 4-wire configurations combine channels into pairs)
• Switching Technology: Reed relays
• Scan Rate: Up to 250 channels per second
• Maximum Voltage: 300 V
• Current Switching Capability: 50 mA
• Bandwidth: 10 MHz
• Signal Conditioning: Built-in thermocouple reference junction
• Input Connections: Screw terminals
– Key Features
• Mixed 2-wire and 4-wire configurations on a single module for diverse sensor and signal types
• Reed relay switching for reliable contact integrity across measurement cycles
• Built-in thermocouple reference junction eliminates external cold junction compensation requirements
• User-provided shunt resistors enable current measurement capability
• Transient voltage protection: direct connection to AC mains not recommended without external suppression; module rated CAT ‘Others’
– Typical Applications
• Automated test systems requiring multi-point signal acquisition
• Temperature and resistance measurement in industrial process monitoring
• High-speed data logging with sequential channel scanning
• Laboratory and field test environments where 2-wire and 4-wire flexibility is required
– Compatibility & Integration
The DAQM902A is a plug-in module designed exclusively for the Keysight DAQ970A and DAQ973A mainframes. It integrates within the modular ecosystem alongside compatible modules including the DAQM900A, DAQM901A, DAQM903A, DAQM904A, DAQM905A, DAQM907A, DAQM908A, DAQM909A, and DAQM910A.
