Configuring The Hardware; Differential Input Mode; Single-Ended Input Mode - Measurement Computing PCI-DAS6052 User Manual

PCI-DAS6052 User's Guide

Configuring the hardware

All hardware configuration options on the PCI-DAS6052 are software controlled. You
can select some of the configuration options using InstaCal, such as the analog input
configuration (16 single-ended or eight differential channels), the edge used for
triggering when using an external pacer, and the source for the two independent
counters. Once selected, any program that uses the Universal Library will initialize the
hardware according to these selections.
Following is an overview of the available hardware configuration options for this board.
There is additional general information regarding analog signal connection and
configuration in the Guide to Signal Connections (available on our web site at
http://www.measurementcomputing.com/signals/signals.pdf).

Differential input mode

When all channels are configured for differential input mode, eight analog input
channels are available. In this mode, the input signal is measured with respect to the low
input. The input signal is delivered through three wires:
The wire carrying the signal to be measured connects to CH# IN HI.
The wire carrying the reference signal connects to CH# IN LO.
The third wire is connected to LLGND.
Differential input mode is the preferred configuration for applications in noisy
environments, or when the signal source is referenced to a potential other than PC
ground.

Single-ended input mode

When all channels are configured for single-ended input mode, 16 analog input channels
are available. In this mode, the input signal is referenced to the board's signal ground
(LLGND). The input signal is delivered through two wires:
The wire carrying the signal to be measured connects to CH# IN HI.
The other wire is connected to LLGND.
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Installing the Board