Product category:
Cabling, Conduit, Accessories and Signal Conditioning
News Release from: Impulse | Subject: 8B50/51 analogue voltage input modules
Edited by the Engineeringtalk Editorial
Team on 07 July 2005
Signal conditioners boast bigger
bandwidth
Dataforth Corp has just introduced the latest addition to its family of SensorLex 8B isolated analogue signal conditioners: the 20kHz filter bandwidth 8B50/51 analogue voltage input modules.
Dataforth Corp has just introduced the latest addition to its family of SensorLex 8B isolated analogue signal conditioners: the 20kHz filter bandwidth 8B50/51 analogue voltage input modules These modules provide a much wider bandwidth than the recently introduced 1kHz bandwidth 8B40/41 modules and a significant increase over the 3Hz bandwidth 8B30/31 modules introduced in January 2005
This article was originally published on Engineeringtalk on 15 Mar 2000 at 8.00am (UK)
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The 20kHz bandwidth of the 8B50/51 series is essential for a number of specific applications.
These include: vibration analysis, such as suspension monitoring in automotive applications; isolation for nonisolated accelerometer signals used in high speed DSP systems; isolation and low phase delay for high speed control loops; monitoring high frequency strain gauge signals; and monitoring high frequency sound wave harmonics generated by flow valves, throttles, turbines etc In addition to wide bandwidth, the 8B50/51 modules also provide high ratings of +/-0.10% accuracy and +/-0.05% linearity.
Developed in response to customer requests worldwide for smaller, lower cost isolated signal conditioners, the SensorLex 8B family ensures fully functional Instrument Class performance in a package only one-fifth the size of competing modular products; with their high performance, cost-effective pricing, and miniature size, Dataforth's 8B signal conditioners represent a true technological breakthrough.
Since its introduction, the 8B line has grown to include 17 family groups with a total of 106 modules that interface to a wide variety of analogue signals such as volt, millivolt, current, temperature (thermocouple and RTD), position, frequency, and strain measuring devices.
Measuring only 28.1 x 41.9 x 10.2mm, the 8B signal conditioner is 80% smaller than similar products, making it ideal for embedded or portable applications such as mobile test stands, COTS military and defence applications, miniaturised security and surveillance systems, and embedded process controls for semiconductor manufacturing equipment.
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With the SensorLex 8B, it is now possible to incorporate high-performance module I/O on a per-channel basis for any embedded monitoring or measurement and control systems; because the 8B provides an instrument class analogue output, interfacing to almost any PC/104, compact PCI, VMEbus, PXI, or proprietary data acquisition system board is very easy.
The 8B50/51 voltage input modules accept millivolt and voltage level signals.
They achieve signal filtering with a five-pole filter that is optimised for time and frequency response and provides 100dB per decade of normal-mode rejection above 20kHz.
One pole of the filter is on the field side of the isolation barrier for anti-aliasing; the other four are on the system side.
Common-mode rejection is 100dB.
These modules feature a special input circuit that provides protection against accidental connection of power-line voltages up to 240V AC continuous, and clamp circuits on the I/O and power terminals protect against harmful transients.
Isolation, 1500V RMS, suppresses transmission of common-mode spikes or surges; it is provided by capacitive and transformer coupling.
These modules are designed for installation in Class 1, Division 2 hazardous locations and have a high level of immunity to environmental noise.
Housed in a solid, potted thermoplastic plug-in-the-panel package with a flammability rating of UL94V0, the 8B family of isolated signal conditioners is specifically designed to protect user equipment, while reducing electrical noise and enabling convenient system expansion and repair.
All 8B modules offer dimensional stability over temperature, chemical resistance, and excellent stability over time; they do not require recalibration.
Operation and storage temperature for the 8B models is -40 to +85C; relative humidity range is zero to 95% noncondensing.
All models meet the requirements of EN61000-6-4 (radiated/conducted emissions) and EN61000-6-2 (ESD/RF/EFT immunity).
For operation in hazardous environments, North American Class 1, Division 2, and European Group II, Category 3, approvals are pending.
Design-in accessories for the 8B line include a selection of backpanels (two, four, eight and 16 channels) that provide screw-terminal inputs and outputs as well as a DB25 header connector that connects 8B outputs to a user's data acquisition system.
ThedB25 header can be matched with a 1, 2 or 7m cable to connect sensors and transducers to an external 25 screw-terminal interface board.
Moreover, a power supply module in the same 8B form-factor is offered to accommodate input voltages of 12 to 36V DC and provide 5V DC output at 2A to power any combination of 8B signal conditioners.
The 8BPWR-2 module plugs into its own socket on the back panel, which protects the power supply module from transients and reverse wiring errors.
Coming months will see the introduction 8B linearised two-, three- and four-wire RTD input modules, potentiometer input modules, strain gauge input modules, two-wire transmitter interface modules, and frequency input modules.
Custom signal conditioning models also are available to meet unique signal conditioning needs, and the 8B line will soon be available in a DIN mount configuration.
Prices for 8B modules star at GBP 49.
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