Omega-vehicle-security DAQ-16 Manuale Utente

INTERFACE CARDS FOR PERSONAL COMPUTERSDAQ-16Data Acquisition Adapterfor 16-bit ISA compatible machinesUsers ManualOMEGA ENGINEERING, INC. TEL: (2

2. Circuit Board Description and ConfigurationThe base address of the DAQ-16 is selected using switches SW1 and SW2. The operatingmode of the DAQ-1

Figures 2-1 and 2-2 show the configuration options for jumpers J7 and J6.J7J7 J7132424241313 Gain = 1 Gain = 10 Gain

The final stage of the A/D converter circuit is the A/D converter IC. The converter must beconfigured for unipolar or bipolar input voltages and for b

+32,767+32,767+65,535+65,535+Vmax+16,3840+49,152+32,768+Vmax/20-32,768+32,76800-16,384n/a+16,384n/a-Vmax/2-32,768n/a0n/a-Vmaxbipolarunipolarbipolaruni

2.2 Digital to Analog ConvertersThe digital to analog (D/A) section of the DAQ-16 consists of two independent 12-bitmultiplying D/A converters, and tw

5 6 7 81 2 3 4J4Channel 1 gainChannel 1 selectChannel 0 selectChannel 0 gainFigure 2-5. Jumper J4 ConfigurationTable 2-3 lists confi

2.4 Base AddressThe DAQ-16 uses 16 consecutive I/O address locations in the range 0 to 0FFFFH. Twosix-position switches (SW1 and SW2) are us

2.5 Clock SelectionThe DAQ-16 is equipped with a programmable clock circuit to produce data sampling ratesindependent from the clock rate of the host

2.5.1 Internal ClockSampling rates for the internal clock can be calculated using the following equation: t = 100ns * [N1*N2] o

When configured for a 48-bit divider, the first sampling period will be slightly longer thanthe others because the first clock period is required to

WARRANTY/DISCLAIMEROMEGA ENGINEERING, INC., warrants this unit to be free of defects in materials and workmanship for a period of 13months from the da

When the multi-function timer is used as a pre-divider, the frequency of the external clockinput may be varied from DC to 10 MHz as long as the high p

2.7 Direct Memory AccessDirect Memory Access (DMA) transfers provide a way of transferring data from theDAQ-16's A/D converter into the compute

2.8 InterruptsThe DAQ-16 is capable of generating an interrupt from one of four sources:1. End of conversion signal2. DMA terminal count3. Multi-funct

3. External ConnectionsThe DAQ-16 is equipped with a high density 62-pin connector as shown in Figure 3-1.2 - CH1+ 4 - CH2-6 - CH4+8 - C

CH0-,CH0+,...,CH7-,CH7+ : Analog inputs to the analog to digital converter. Amplitude andpolarity depend upon jumper settings. The input resista

4. Register Description and ProgrammingThe DAQ-16 uses 16 consecutive I/O address locations in the range 0 to FFFFH. The cardutilizes these addresse

DMAEN - enables / disables DMA. When set, logic 1, DMA transfers are enabled. DMACT - enables the multi-channel DMA capability of the DAQ-16. When set

4.1.2 Start of Conversion RegisterThe start of conversion register is 16-bit write only and performs two functions:1. When configured for internal

4.2 Programming the 8254 Counter/TimerThis section provides programming information for the 8254 counter/timer as implementedon the DAQ-16. For more

Counter 1 - Clock rate register (high word)operating mode: 2minimum count value: 2configuration byte: 0 / 1 / 1 / 1 / 0 / 1 / 0 / 0 = 74H

OMEGAnet On-line Service: Internet e-mail: http://www.omega.com [email protected] North Americ

DAQ-16 Users ManualVersion 2.20January 28, 1999Part No. 940-0032-220

United Kingdom: One Omega Drive, River Bend Technology DriveISO 9002 CertifiedNorthbank, Irlam, ManchesterM44 5EX, England Tel: 44 (161) 777-6611FAX:

Declaration of ConformityManufacturer's Name: Omega Engineering Inc.Manufacturer's Address: One Omega DriveStamford, CT 06907-0047Applicati

Table of Contents284.2 Programming the 8254 Counter/Timer...274.1.8 8254 Control Word/Status Register...

List of Figures and Tables25Table 4-1. DAQ-16 Address Map...15Table 2-3. Jumper J4 Configuration.

1. IntroductionThe DAQ-16 is a high speed data acquisition adapter for IBM AT compatible machinesoffering eight differential analog input channels wi

1.2 DAQ-16 SpecificationsDACK 5, 6, 7DRQ 5, 6, 7DMA Levels:IRQ 2, 3, 4. 5, 6, 7, 10, 11, 12, 14, 15Interrupt Levels:0000H - FFFFHI/O Address Range:ISA