Modular instrumentation house Pickering Interfaces (Grants Pass, Oregon) expands its range of PXI programmable resistor modules with the introduction of its Model 40-295 board, and Model 40-296 board.
These PXI 2.0 plug-ins let programmable resistors and potentiometers simulate external sensors and controls. Both the 40-295 and 40-296 can simulate resistors and pots as needed in compliance and manufacturing test applications.
Pickering says its new modules offer the highest density of programmable resistors available from any PXI manufacturer. Moreover, the modules are available in a wide variety of different standard formats to suit your application, and special configurations can also be ordered.
The products are also complimentary to the company's existing lower-density Model 40-290 resistor modules.
Each single-slot 3U-sized PXI 40-296 module can support up to eighteen 8-bit adjustable resistor channels, or it can be configured as a programmable potentiometer, providing up to nine 8-bit pot channels or three 24-bit pot channels.
Alternative resolutions of 12 bits, 16 bits, and 24 bits can be supplied, too, with the Model 40-295 supporting up to six 24-bit channels.
Both plug-ins use instrument-grade (low thermal offset) reed relays for switching. The relays are sputtered Ruthenium types that ensure very long life with good low-level switching performance and contact resistance stability. All the relays are manufactured by Pickering's sister company Pickering Electronics.
As you can see from the table, these boards can switch 500-mA or more, and individual resistors can dissipate 500-mW, which isn't too shabby.
These plug-ins also contain non-volatile memory for storage of parameters and calibration data.
Windows Ware Supplied
All of these PXI cards are supplied with Windows 98, Windows 2000, Windows NT, and Windows XP drivers. You can use them to write words to a card to set the relay pattern, or write a bit to operate an individual relay. You can also use software to get relay status reports, and card identification and location information, as well as to set and read card calibration data. Up-to-date driver software is also available from Pickering's Web site.
Pickering Interfaces Inc., 2900 NW Vine Street, Grants Pass, Oregon 97526. Phone: 541-471-8828 Fax: 541-471-0700. E-mail: firstname.lastname@example.org.