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DT8837

The DT8837 is a highly accurate multi-channel module that is ideal for sound and vibration measurements. All the I/O channels are completely isolated from each other and from the computer, allowing noise-free data to be sampled in tough industrial environments. Four 24-bit IEPE (ICP®) sensor inputs, a 24-bit D/A stimulus output, a 31-bit tachometer channel are synchronized to provide data streams that are matched in time for field or laboratory use.

Key Features:

• IEPE or Voltage inputs
  • ISO-Channel™ provides ±500V galvanic isolation channel-to-channel for all I/O signals and grounds
  • 4 Simultaneous, 24-bit Delta-Sigma A/D channels for high resolution measurements, or use as 4 IEPE inputs for direct sensor connection
  • Input range of ±10V with gains of 1 and 10, software selectable
  • 4mA current source with 24V compliance voltage, software selectable
  • AC/DC coupling, software selectable
  • sample rate up to 52.734 kHz, programmable
• Total In Sync Data
  • ADCs, Tachometer, Counter and DAC feedback channels sampled simultaneously and can be selectively included in input sample data
  • Two 32-bit counters for measuring tachometer, gate and ADC conversion relationships
• Continuous Waveform Output
  • One 24-bit D/A Converter, +/- 10 volts
  • On-Board memory allows continuous waveform output without host communication (2 – 128k Samples)
  • Sample rate up to 52.734 kHz, Programmable
  • 16-bit feedback ADC to allow correlation of output stimulus with sampled input data
• Robust Digital Outputs
  • 4 digital outputs can switch up to +/-30V @ 400 mA... Ideal for driving mech relays or motors
• Module Expansion
  • Stack up to 16 modules for parallel operation of 64 channels (IEPE or voltage) via the Trigger Bus
  • Several Trigger options: Software, External TTL trigger input, Variable threshold trigger, Trigger Bus, LAN Trigger Packet
  • Synchronization reference clock, ADC sync and trigger input/output via Trigger Bus for synchronizing multiple up to 16 instrument modules

The DT8837, a 1U 1/2 rack instrument module, uses direct BNC connections to the four parallel ISO-Channel analog inputs and the analog output. Connections for the tachometer, counters, digital output, and Ethernet are available on the rear panel.

Up to sixteen modules may be used in parallel to connect a possible 64 direct voltage or IEPE channels, each synchronized in a master/slave configuration. The picture above shows four instrument modules in such a configuration.