| Back to CD |
|
Back to WELCOME Page |
| Back to CD |
|
Back to WELCOME Page |
The DAS-1600/1400 Series is a family of high speed analog and digital I/O boards for IBM PC and compatible computers. Each board is available in two versions. The '01' suffix indicates high gains of 1, 10, 100, and 500. The '02' suffix indicates low gains of 1, 2, 4 and 8. The following table outlines the major data acquisition features of these products.
The DAS-1600/1400 boards occupy a single expansion slot in the computer. All boards in the family are of multilayer construction with an integral ground plane to minimize noise and crosstalk even at high sample rates. All boards are register and pin-compatible. As a result, applications running on one board in the series can be ported to another board in the series in the future without throwing away your investment in software and accessories.
The DAS-1600/1400 Series boards use a 12-bit successive approximation converter. Each board in the series offers 8 differential or 16 single-ended analog inputs. The inputs of the DAS-1600 and DAS-1400 can be set to unipolar (e.g., ▒10 V) modes. Input ranges are software-programmable. Actual system throughput will vary with the gain selected.
A/D conversions are initiated in one of three ways: software command, internal programmable interval timer, or external trigger. Data transfers also occur in one of three ways: polling a status register and reading data when ready, generation of a hardware interrupt and an interrupt service routine, or using the DMA (Direct Memory Access) mode. These operating modes are selected using a control register on the board and are supported by the utility software included with this board.
A three-channel programmable interval timer (Intel 8254) provides trigger pulses for A/D conversions. The DAS-1600/1400 Series uses two of the counter channels as frequency divider for an interval 10 MHz crystal-controlled oscillator. The output of this circuitry provides the trigger pulse for each conversion. The third channel is uncommitted and provides a gated 16-bit binary counter for event or pulse counting, frequency, or pulse generation.
The DAS-1600 provides two multiplying 12-bit D/A output channels. The D/A converters have switch-selectable output ranges of 0 to +5 V, 0 to +10 V, ▒5 V, and ▒10 V full scale. The D/A converters may use an external DC or AC reference to achieve different output ranges. The analog outputs are set to 0 V at powerup. Eight bits of digital I/O (4 input and 4 output) are brought out on the DAS-1600/1400 Series main 37-pin connector. The 4 digital outputs on this connector can be used to control external accessories, such as the EXP-16. The additional 24 digital I/O bits on the DAS-1600 are bi-directional and are available on the auxiliary connector. These 24 bits are divided into two 8-bit ports and two 4-bit ports. Each port is configurable independently as an input port or an output port. The 24-bit digital port is 100% compatible with PIO-12 board and can connect directly to the SSR-RACK24 and ERB-24.
The analog I/O connections are made via a 37-pin 'D' connector at the rear of the host computer. An auxiliary 40-pin connector supports the connections to the DAS-1600 24-bit digital I/O port. A cable connecting the 40-pin connector on the board to a second backplate with a 37-pin 'D' connector is included. This second connector allows digital I/O accessories to be used with the DAS-1600.
Driver Software
DriverLINX software is also included, at no additional charge, with every DAS-1200 series board. Supporting your programming requirements in Windows 3.x/95 environments, DriverLINX provides application developers a standardized interface to over 100 services for creating foreground and background tasks to perform analog input and output, digital input and output, time and frequency measurement, event counting, pulse output and period measurement. In addition to basic I/O support, DriverLINX also provides sophisticated built-in capabilities to handle memory and data buffer management, a rich selection of starting and stopping trigger events including pre-, mid-point, and post triggering protocols, extensive error checking and reporting capabilities, and a context-sensitive on-line help system. There are two versions included: DriverLINX and DriverLINX/VB. DriverLINX provides the C/C++interfaces. DriverLINX/VB provides custom control interfaces (VBX and ActiveX) that can be accessed from the palette of built-in tools included in Microsoft's Visual Basic and Visual C environments. Software is supplied on CD-Rom.
Connector Pin Assignments
The analog inputs and 8 digital I/O connections are made via a 37-pin D-type connector at the rear of the computer. In the DAS-1600 there is an auxiliary 40-pin connector that supports connections to the remaining 24-digital I/O lines. In the DAS-1600 the analog output connections are made at the main connector. In order to get access to all of the analog inputs and outputs, as well as the additional 24 bit digital I/O connector, two C-1800 cables and two STA-U terminal panels are required. The STA-16 may be used instead of the STA-U for the analog I/O, since it numbers each channel's high and low inputs and therefore makes wiring easier. The STA-U must be used for the 24 bit digital IO port. It is simply a screw terminal accessory board that numbers it's terminals from 1-37 in sequence.
View an Adobe Acrobat pdf file for more
product info (requires Acrobat Reader).
|
| |||||
