Omega Speaker Systems PCI-DAS1001, PCI-DAS1002 manual Board

Page 15

Isolatio n B arrie r

 

mon

 

 

 

Large

com

 

 

 

ode voltage signal

board

 

 

 

m

between

& A/D

 

 





 

source

 

 

 

 

 

G N D

W hen the voltage difference between signal source and A/D board ground is large enough so the A/D board’s comm on m ode range is exceeded, isolated signal conditioning m ust be added.

CH

H igh

+

 

 

 

 

 

 

In p u t

To A /D

 

 

A m p

 

 

 

CH Low

-

 

 

 

10 K

 

 

 

LL GN D

 

 

I/O

 

A/D Board

C onnector

 

10K is a recom m ended valu e . You m ay short LL G N D to C H Low instead, b ut this w ill reduce your system ’s noise im m unity.

System with a Large C om m on Mode Voltage,

Connected to a Differential Input

4.2.6 Isolated Grounds / Single-Ended Inputs

Single-ended inputs can be used to monitor isolated inputs, though the use of the differential mode will increase your system’s noise immunity. The diagram below shows the recommended connections is this configuration.

 

ted

 

 

ola

 

 

l

Is

 

 

 

 

 

 

na

 

 

sig

source

 

 

 

 





 

CH IN

 

LL GND

I/O

C o nn ector

+

Inp ut

 

To A/D

A m p

 

 

 

-

A /D Board

Isolated Signal Source

Connected to a Single-Ended Input

4.2.7 Isolated Grounds / Differential Inputs

Optimum performance with isolated signal sources is assured with the use of the differential input setting. The diagram below shows the recommend connections is this configuration.

12

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Contents Users Guide Table of Contents BADR4 BADR0 BADR1BADR2 BADR3Introduction Introduction InstallationDOS and/or Windows RUN InstaCalHardware Connections Connector PIN DiagramAnalog Connections Single-Ended and Differential InputsSingle-Ended Inputs Differential Inputs Differential InputWhich system do you have? System Grounds and IsolationSystems with Common Mode ground offset Voltages Small Common Mode VoltagesLarge Common Mode Voltages Ground Category Input Configuration Our view PCI-DAS1000 and signal source already have isolated grounds    Board Board Programming & Software Applications Analog Inputs SELF-CALIBRATION of the PCI-DAS1000Analog Outputs Region Function Operations BADR0BADR1 Interrupt / ADC Fifo RegisterAdflcl InteEoaie IntclCHL8-CHL1, CHH8-CHH1 ADC Channel MUX and Control Register BADR1 +EOC Pacer Source= ADC Done = ADC Busy Trigger CONTROL/STATUS Register BADR1 + TS10ARM Indxgt Fifo Mode Sample CTRC0SRC XtrigCal Source Calibration RegisterBADR1 + DAC Channel Cal FunctionDACnR1 DACnR0 Range LSB Size Dacen ModeDAC CONTROL/STATUS Register BADR1 + DACnR10MSB LSB BADR2ADC Data Register BADR2 + ADC Fifo Clear Register BADR2 +Device Counter # Function BADR3ADC Pacer Clock Data and Control Registers BADR3 +DIO Port B Data ADC 8254 Control RegisterDigital I/O Data and Control Registers DIO Port a DataDIO Port C Data DIO Control RegisterPort a Port C Port B Upper Lower OUT BADR3 + Ah Index and User Counter 4 Data and Control Registers8254B Counter 1 Data User Counter #5 8254B Counter 2 Data User Counter #6BADR3 + Bh 8254B Control Register2 DAC1 Data Register BADR41 DAC0 Data Register BADR4 +Electrical Specifications Analog Output Environmental Power consumptionEC Declaration of Conformity