Measurement Computing DBK Part 2 - Manual (Page 145)

DBK80
16-Channel Differential Voltage Input Card
with Excitation Output
Overview …… 1
Hardware Setup …… 2
Card Connection …… 2
Card Configuration …… 4
DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration …… 5
DaqBook/2000 Series and DaqBoard/2000 Series Configuration …… 6
Software Setup …… 6
DBK80 – Specifications …… 6
Reference Notes:
o
Chapter 2 includes pinouts for P1, P2, P3, and P4. Refer to pinouts applicable to your
system, as needed.
o
In regard to calculating system power requirements, refer to DBK Basics located near
the front of this manual.
Overview
The DBK80 is a low-noise, high-speed, unity-gain multiplexer card that provides 16 channels of
differential voltage input. Up to 16 such cards can be attached to a single Daq device, providing a possible
256 differential input channels. The card’s unity gain combines with DaqBook, DaqBoard, and LogBook
gains to accept full scale inputs from
±156 mV to ±10 V. The DBK80’s expansion channels can be
scanned at the maximum 200 kHz rate while maintaining measurement integrity.
The DBK80 includes an on-board excitation voltage source that is jumper-selectable to be +5 or +10 VDC.
This source can be used to bias transducers or to measure resistors and thermistors without additional
instrumentation.
Note 1: Offset adjustment is only intended for use during
calibration.
Note 2: JP2 is used to select an excitation source output
voltage of +5 VDC or +10 VDC. The factory default
is +5 VDC.
DBK80 Block Diagram
DBK Option Cards and Modules 989494 DBK80 pg. 1