New MAQ20-BRDG1 strain gauge module enhances the Dataforth MAQ20 range

News19 Jun 2015
The powerful MAQ20 data acquisition and control system from Dataforth, is now available with a new strain gauge input module, MAQ20-BRDG1.
The MAQ20-BRDG1 strain gage input module offers 4 input channels and can interface to full, half, and quarter bridge sensors using 4-wire or 6-wire connections. All channels are individually configurable for range, alarms, and averaging to match the most demanding applications. In addition, sampling rate, resolution, bandwidth, excitation voltage, and shunt calibration are user settable parameters.

Input signals are sampled simultaneously and burst mode can be used to capture fast events. High, Low, High-High and Low-Low alarms provide essential monitoring and warning functions to ensure optimum process flow and fail-safe applications. Hardware low-pass filtering in each channel provides rejection of unwanted frequencies. Additionally, field I/O connections are made through spring cage terminal blocks with positions designated for the termination of wiring shields.

MAQ20-BRDG1 takes the MAQ20 Data Acquisition System to the next level

“The MAQ20 strain gage input module is so versatile,” says John Lehman, Dataforth Engineering Manager. ”This multi-input, feature-laden product implements a high level of signal conditioning in a small package and takes the MAQ20 Data Acquisition System to the next level.”

MAQ20-BRDG1 offers robust 1500Vrms input-to-bus isolation with each individual channel is protected up to 30Vrms continuous overload in case of inadvertent wiring errors. Importantly, overloaded channels do not adversely affect other channels in the module, which preserves data integrity.

Input ranges are selectable on a per-channel basis. Four ranges are available. Over-range and under-range up to 2% beyond the specified input values is allowed, and accuracy is guaranteed to ±fs.
The MAQ20-BRDG1 interfaces to transducers with a resistance of 100Ω to 1kΩ. Four 24-bit data converters provide highly accurate measurements.

Signal sampling rate can be set to 200S/s continuous or to 1kS/s to 32kS/s burst with simultaneous sampling on all 4 channels and automatic signal filter scaling; internal memory in the module is used to capture burst samples of input signals.

Programmable signal gain allows full-scale input ranges of ±8mV to ±100mV. Strain gage excitation is provided from the module by a stable 2.5V, 3.333V, 5V, or 10V source.

MAQ20-BRDG1 key features

  • 4 Input Channels for 4-Wire or 6-Wire Sensors
  • Interface to Full, Half and Quarter (with external bridge completion) Sensors
  • All Channels Individually Configurable for Range, Alarms, Averaging
  • Interface to 100Ω through 1kΩ Strain Gages
  • Programmable Sampling Rate & Resolution
  • Simultaneous Sampling of Input Signals
  • Burst Mode for Capturing Fast Events
  • Programmable Bandwidth, Excitation, Shunt Calibration
  • 1500Vrms Input-to-Bus Isolation
  • Input Protection to 30Vrms Continuous
  • 24-bit Data Conversion
  • ±0.05% Accuracy
  • ±0.02% Linearity
  • 100dB CMR
  • Shunt-cal Resistance, 60kΩ, 100kΩ, 200kΩ, external
  • Zero-Balance per Channel
  • ANSI/IEEE C37.90.1 Transient Protection
  • -40°C to +85°C Operating Temperature
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