San Diego, Calif. ACCES I/O Products has expanded its PC/104 isolated digital I/O board family with the introduction of the 104-IDI-48 series. These are 48-channel PC/104 utility boards with 48 optically-isolated digital inputs. These boards are aimed at control and instrumentation applications where high-voltage protection is required. Individual channel-to-channel isolation allows every channel to be physically and electrically separated from the others, said the company.
Enabled inputs feature a change-of-state detection capability that provides a means to automatically interrupt the host computer in real time. When one or more input bits change state, an interrupt is generated to automatically wake up the application. Each input is rectified by photo-coupler diodes, therefore it is polarity insensitive either positive or negative and AC voltage inputs are acceptable. Zero crossings and glitches are eliminated by input filters. The input range is up to 60 VDC or AC rms at frequencies of 40 Hz to 10 kHz.
These boards are particularly useful in applications where high common-mode external voltages are present. Isolation is required to protect electronics from transient voltage spikes and these boards offer greater common-mode noise rejection in electronically noisy environments. Applications include factory automation, energy management, industrial ON/OFF control, security systems, manufacturing test, and process monitoring.
In addition to protecting industrial applications from accidental contact with high external voltages, the isolation provided eliminates troublesome ground loops, said the company.
The optically isolated digital inputs are split into two 50-pin IDC type headers each containing 24 channels. Accessories available include a variety of ribbon cables and screw terminal boards for quick and easy connectivity.
These boards are supported for use in most operating systems and include a free DOS, Linux and Windows 98/NT/2000/XP/2003 compatible software package. This package contains sample programs and source code in "C" for DOS, and Visual Basic, Delphi, C++ Builder, and Visual C++ for Windows. A graphical setup program in Windows is also incorporated. Linux support includes installation files and basic samples for programming from user level via an open source kernel driver.
Third-party support includes a Windows standard DLL interface usable from the most popular application programs, and includes example LabVIEW VIs. Embedded OS support includes Windows XPe and CE.
Pricing: $349.00 for Model 104-IDI-48AC (48 isolated inputs with change detection). Volume pricing is available.
Availability: From stock to two weeks ARO.
Product information: Model 104-IDI-48AC
ACCES I/O Products, Inc. 1-858-550-9559, www.accesio.com