OMB-DBK Option Cards and Modules - Omega Engineering
OMB-DBK Option Cards and Modules - Omega Engineering
OMB-DBK Option Cards and Modules - Omega Engineering
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Connecting <strong>DBK</strong>s to DaqBook/2000 Series Devices<br />
Several products make use of the DaqBook/2000 nomenclature. However, they do not all offer the same<br />
connection options. Refer to pinouts for the specific devices, as needed.<br />
Product Connects to <strong>DBK</strong> Expansions via …<br />
DaqBook/2001 <strong>and</strong> /2005 37-pin connectors P1, P2, <strong>and</strong> P3. There is no P4.<br />
DaqBook/2020 37-pin connectors P1 <strong>and</strong> P2. There is no P3 or P4.<br />
DaqOEM/2001 <strong>and</strong> /2005 40-pin headers (JP1, JP2, <strong>and</strong> JP3). There is no P4.<br />
DaqBook/2000A 37-pin connectors P1, P2, P3, <strong>and</strong> a 100-pin P4 connector.<br />
DaqBook/2000E 37-pin connectors P1, P2, P3, <strong>and</strong> a 100-pin P4 connector.<br />
DaqBook/2000X 37-pin connectors P1, P2, P3, <strong>and</strong> a 100-pin P4 connector.<br />
For DaqBook/2000 Series devices, <strong>DBK</strong> connections can be made to Ports P1, P2, <strong>and</strong>/or P3 (when<br />
applicable). For the “AEX” models a 100-pin P4 connector can be used. A discussion of both methods,<br />
follows.<br />
The P4 connector on a DaqBook/2000 “AEX” device shares signal connections with the<br />
P1, P2, <strong>and</strong> P3 connectors. P4 offers no additional I/O. Connecting a <strong>DBK</strong>200 Series<br />
<strong>Option</strong> to P4 via a CA-195 cable distances the P1, P2, P3 connection from the<br />
DaqBook/2000 Series device. It does not provide any new signal I/O. See the following<br />
Caution.<br />
CAUTION<br />
Signal conflicts between a DaqBook/2000 “AEX” device’s P1, P2, P3 connectors <strong>and</strong> its<br />
P4 connector can result in erroneous readings <strong>and</strong> possible equipment damage.<br />
Therefore, when connections have been made to P1, P2, <strong>and</strong>/or P3, use caution when<br />
making connections through P4, <strong>and</strong> visa versa.<br />
Refer to P1, P2, P3, <strong>and</strong> P4 pinouts to avoid making duplicate signal connections.<br />
There are two ways to connect a <strong>DBK</strong> option to a DaqBook/2000 “AEX” device. The first<br />
method is preferable, as it introduces less noise.<br />
Preferred Method – (a) Connect a CA-37-x cable to the appropriate DB37 connector<br />
[P1, P2, or P3] on the DaqBook/2000 Series device. (b) Connect the<br />
free end of the cable to the <strong>DBK</strong> card or module.<br />
<strong>Option</strong>al Method – (a) Connect a CA-195-x cable to the P4 connector on the<br />
DaqBook/2000 Series device. (b) Connect the free end of the cable<br />
to a <strong>DBK</strong>200 Series device. (c) Connect the <strong>DBK</strong> option to the<br />
<strong>DBK</strong>200 Series device, as applicable.<br />
The primary reason that less noise is seen in the “preferred” method is that a<br />
DaqBook/2000 Series device’s P1 connector pertains only to analog acquisition signals<br />
<strong>and</strong> the P2 connector pertains only to digital I/O. This provides a strong degree of<br />
isolation between the two signal types. However, in the case of a CA-195-x cable<br />
connected to P4, digital <strong>and</strong> analog signals co-exist in one cable.<br />
If you need to use the P4 connection method, use of the 8-inch ribbon cable (CA-195-1)<br />
will result in the lowest level of crosstalk [for that method].<br />
Daq Systems 967794 <strong>DBK</strong> Basics, pg. 5
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