PAR24B SPEC SHEET

PAR24B -- click for photo tour
PAR24B IN 1U HIGH DESKTOP ENCLOSURE PHOTO

Not recommended for new designs.
Please use the PAR8CH instead.

PAR24B A/D Features

    Replaced by the PAR8CH
    Eight 24 bit analog channels
    Sampling rates from DC to 1 kHZ
    Individual A/D converter per channel
    32K FIFO data buffer
    8 digital outputs
    Low 120 milliamp current draw
    Connects to PC parallel port
    Application software with source
    Price $950
    Specs Table
    Options Table


Product Description

The PAR24B is an 8 channel, 24 bit realtime continuous data acquisition system with an individual A/D per channel architecture. With an individual A/D per channel you get high resolution on each channel with no channel to channel timing skew or crosstalk.

For the PAR24B 24 bit A/D, highest resolution is in the 10-100 Hz range, with maximum sampling rates of 1 kHz. All PAR24B inputs are differential with amplitude ranges jumper selectable for +/-2.5 or +/- 10 volts. The on board SRAM FIFO allows heavily interrupted and multitasking PCs to finish any current processing before retrieving acquired data, resulting in continuous acquisition with no data loss. Sitting outside the PC for improved noise performance, the PAR24B communicates all of its acquired data to the PC using the standard EPP/BPP parallel port.

A full-featured acquisition kernel and display program is included with this system so you can be up and running immediately. This program allows users to control acquisition rates and continuously save acquired data to disk. In addition, for those wishing to develop their own custom code and applications, low level functions for controlling the PAR24B are supplied as 16 and 32 bit DLLs and as National Instruments LabVIEW drivers. Full source code is included. Also, the PDF user manual contains circuit diagrams for hardware specifics.

The PAR24B comes with all the accessories you need to start acquiring data. These include software, manual (PDF), a 4K FIFO, 9VAC power supply, 6' parallel port cable, an 8 channel terminal board, and a desktop enclosure. Separately priced upgrades to a 32K FIFO or a full size rack mount enclosure are also available.

For additional information see:  Manual ExcerptsSoftwarePAR8CH

Specifications Table

PAR24B Specs
Channels: 8  
Resolution: Max: 24 bits, Typical: 23 bits at 10 Hz, 20 at 100 Hz, 15 at 1 kHz  FAQ note 
Sample Rate: Min: 10 Hz, Max: 1 kHz, Recommended: 10-100 Hz  
Gain: 1 to 128, program selectable  
Crosstalk: Down more than 140 dB (24 bits) at 100 Hz  FAQ note 
Analog input type: Differential  FAQ note 
Common Mode Rejection: 96 dB with analog input range of +/- 2.5  
Analog input voltage: +/-2.5v or +/-10v, jumper selectable  FAQ note 
Analog input impedance: Sampling rate dependent, see Harris HI7191 spec sheet  
Analog input header: 8x2 ribbon cable or plain wire with TRM8X2  
Digital I/O: 8 output bits on header J220  FAQ note 
Digital I/O levels: TTL/CMOS 5 volt  
PC Connection: EPP/BPP PC parallel port  FAQ note 
Power Requirements: 9 vac or +/-12 vdc, 120ma @+12v, 20ma @-12v  
A/D Converter: Harris HI7191, 1 per channel  
A/D Type: Sigma Delta  
Data Buffer: 4K FIFO, 32K optional  
Board Layers: 4 including separate power and ground planes  
Board Dimension: 7" x 8"  
Enclosure Dimension: 1U high, 1/2 width, (8 3/8" W x 2" H x 10 1/2" D)  
Supported OS: WinNT 4.0, Win95/98, DOS, Linux, LabVIEW  
Price: $950  

Options Table

Some users may want to consider these options, although none are necessary as the PAR24B will work fine in its standard configuration.

PAR24B Options
Option Description Price
UPGRADE-FIFO-32K Upgrade to 32K from the standard 4K $40  
SUB-TRANS-EURO Substitute a 220 vac European wall style transformer with Continental European type plug and 9 vac, 1 amp output $0  
UPGRADE-RACK-24B Upgrade to a 2U high, full width rack enclosure $100  
Third-Party Products Links to cost effective third-party software and hardware products that enhance the PAR24B are listed on the third-party page  

http://www.symres.com/products/par24b.htm