Keysight DAQM904A 4x8 Two-Wire Matrix Switch Module (Pre-Owned)
Keysight DAQM904A 4x8 Two-Wire Matrix Switch Module (Pre-Owned)Key Features At A Glance 3-slot mainframe with built-in 6½-digit (22-bit) DMM and 0.003% basic 1-year DC voltage accu racy Measures 12 input types: temperature (thermocouple, RTD, thermistor), DC/AC volts, 2-/4-wire resistance, frequency/period, DC/AC current, and capacitance Scan rates up to 450 channels/sec and up to 120 single-ended channels per system Nine plug-in switch, RF, and control modules, including a 4-channel simultaneous-sampling 24-bit digitizer LAN and USB 2.0 standard for PC connectivity; the DAQ973A adds a built-in GPIB interface for ATE integration One-million-reading nonvolatile, time-stamped scanning memory with USB flash-drive logging support 4.3-inch color display with numeric, bar graph, trend chart, and histogram measurement views Code compatible with the 34970A/34972A; BenchVue DAQ software included The Keysight DAQ970A/DAQ973A is a 3-slot data acquisition system built around an internal 6½-digit DMM derived from Keysight's benchtop DMM measurement engine. It combines universal inputs with built-in signal conditioning and modular switch, RF, and control plug-in modules in a compact mainframe. The system bridges two roles that previously required separate instruments: the simple operation and low per-channel cost of a data logger, and the flexibility and higher performance of a modular data acquisition front end.The system is designed for both data logging and automated test. Listed data logging and monitoring applications include environmental chamber monitoring, component inspection, benchtop testing, process troubleshooting, and temperature profiling — monitoring multiple signals such as temperature and voltage over extended periods to identify irregularities. As a data acquisition front end it serves R&D engineers characterizing a design and manufacturing engineers building test systems. The single-ended multiplexer module is called out for battery test, component characterization, and benchtop testing.ValueTronics stocks and ships test and measurement equipment from its own 20,000 sq ft secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit is handled accordingly: pre-owned units are inspected and functionally verified in-house before they ship, while new units ship factory-sealed exactly as received from the manufacturer.Brand HeritageKeysight Technologies traces its measurement heritage through Hewlett-Packard, whose test and measurement business was spun off as Agilent Technologies in 1999. In 2014, Agilent's electronic measurement division was separated to form Keysight Technologies, the manufacturer under which this product line is offered today.Compare Other Models in This SeriesThe DAQ970A/DAQ973A family consists of two 3-slot data acquisition mainframes that share the same internal 6½-digit DMM, the same nine plug-in modules, the same 4.3-inch color display, and the same 1-million-reading nonvolatile memory. Both deliver 0.003% basic 1-year DC voltage accuracy and scan rates up to 450 channels/sec, and both are code compatible with the 34970A/34972A.The two mainframes differ primarily in their built-in computer interfaces. The DAQ970A provides USB and LAN; the DAQ973A provides USB, LAN, and an additional built-in GPIB interface. Both ship with BenchVue DAQ software and the graphical Web interface for remote configuration and monitoring.Each pre-owned model linked below is its own dedicated product page with condition-matched pricing. Select the mainframe whose interface set matches your test system, then choose the condition that fits your budget and documentation requirements.The DAQ970A is the primary mainframe in this family, providing Gigabit LAN and USB 2.0 connectivity along with the graphical Web interface for browser-based configuration, scan execution, and monitoring over a network.The defining difference between the two mainframes is the GPIB (IEEE-488) interface, which is built into the DAQ973A only; both share LAN and USB. For applications integrating into legacy GPIB-based automated test environments, the DAQ973A adds that interface without changing the measurement engine.Both mainframes use the same internal DMM and accept the same nine modules — from the DAQM900A solid-state and DAQM901A armature multiplexers to the DAQM909A 4-channel digitizer — so channel count, switching topology, and measurement functions are determined by module choice rather than by mainframe. See the comparison table for the per-model interface and scanning-rate details.For reading stored memory out over GPIB, the DAQ973A reaches up to 2,500 readings per second, while both mainframes reach up to 120,000 readings per second over LAN and 55,000 per second over USB. Model Type Channels Max Voltage DAQM904A Matrix Switch (4x8) 32 (4 x 8) 300 V DAQ970A DAQ Mainframe (USB, LAN) Up to 120 300 V DAQ973A DAQ Mainframe (USB, LAN, GPIB) Up to 120 300 V DAQM900A Multiplexer (solid-state) 20 120 V Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.Product Core & Specifications Specification Value DAQM904A 4x8 Two-Wire Matrix Switch Number of channels 4 x 8 (2-wire), 32 cross-points Open/close speed 120 ch/s Bandwidth 10 MHz Thermal offset < 1 µV Input (typical) Voltage (dc, ac rms) 300 V Current (dc, ac rms) 1 A Power (W, VA) 50 W DC characteristics (typical) Offset voltage (incremental to DMM specs) < 1 µV Initial closed channel R < 1.0 Ω Isolation Ch-Ch, Ch-Earth > 10 GΩ AC characteristics (typical) Ch-Ch crosstalk (at 1 MHz) -50 dB Capacitance (Hi-Lo) < 50 pF Capacitance (Lo-Earth) < 80 pF Volt-Hertz limit 10^8 Other (typical) Switch life (no load) 100 M Switch life (rated load) 100 K Operating temperature 0 to 55 ºC Storage temperature -40 ºC to 70 ºC Maximum cross-points per frame 96 Important: Internal DMM input section provides up to 300 V of input isolation; DMM input protection is 300 V on all ranges. Important: The internal DMM connections are accessible only through the DAQM900A, DAQM901A, DAQM902A, and DAQM908A low-frequency multiplexer modules. Important: Up to three modules, in any combination, can be inserted into a single mainframe; the DMM is installed inside the chassis, leaving all three slots free for switch and control modules. Important: On the DAQM902A, user-provided shunt resistors are required for current measurements. Important: Thermocouple probes, RTDs, thermistors and Kelvin clips are ordered separately (see Accessories — e.g., 11062A Kelvin clip set, 34307A J-type thermocouples, 34308A 10 kΩ thermistors) and are not included with the mainframe. Important: On-module screw terminals accept wire sizes from 16-gage to 22-gage; 20-gage wire is recommended for high channel count applications.Recommended pairing: the 34307A 10-pack of J-type thermocouples and 34308A 5-pack of 10 kΩ thermistors listed in the ordering information support multi-channel temperature scanning setups. Important: The DAQM905A RF Multiplexer uses SMB connectors; a standard set of (10) BNC-to-SMB adapter cables is provided with each RF module for BNC connections (2 GHz bandwidth via SMB, 1 GHz via the BNC-to-SMB adapters).Recommended pairing: add the DAQM909A 4-channel simultaneous-sampling digitizer to use the included BenchVue DAQ software for frequency-domain (FFT, THD, THD+N, SINAD) and time-domain measurements.About this Pre-Owned unitThis pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects. Warranty included Functional verification included Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. Note that unnecessary accessories may not be included (contact Test Architect to confirm). ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.
