Omega Engineering OMB-DBK-34A, User Manual

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Q: How do I calculate the total amount of power needed for all my DBK options?
A: You can calculate your power needs with the tables in Power Management , in the DBK Basics section
located near the front of this manual.
Q: The CA-134 cable does not work with my Daq PC-Card. Why not?
A: Daq PC-Cards Daq/112B and Daq/216B that have a serial number equal to or greater than S/N 151044
use cable CA-134. This cable’s latching connector does not work with the older PC-cards.
Daq PC-Cards Daq/112B and Daq/216B that have a serial number preceding 151044 require cable
CA-134Q.
Q: I cannot read signals with the DBK12 or DBK13. What could be wrong?
A: To measure single-ended signals with the DBK12 and DBK13:
1) the JP3 jumper on those boards must be set to SE (Single Ended)
2) the signal must be connected to the analog input High terminal and Common .
When measuring SE signals, the Low input is ignored.
To measure differential signals with the DBK12 and DBK13:
1) the JP3 jumper on those boards must be set to DIFF (Differential)
2) the signals must be connected to the High , Low , and Common input terminals.
If only 2 wires exist for your signal, connect them to the High and Low inputs and install a 1K ohm
resistor between the Low and Common [in the area between the terminal strips and the electronics] on
the DBK12 or DBK13. The place to install the resistor is labeled by channel number and is designated
by the letter "L." The letter "H" designates where to install a resistor between the high and common
terminals if balanced inputs are desired.
Note : Cards are presently manufactured with 100K ohm resistors installed in the "L" locations.
Q: My DIP switch settings appear to be giving my DBK card an incorrect address.
A: There have been a few instances in which a DBK modification included replacing one type of DIP
switch with another; for example, replacing a slide-type switch with a rocker-type switch or a toggle-
type switch. Although the actual setting of “0” and “1” values remains unchanged for configuring an
address, using a “toggle-Type” switch diagram for a “Slide-switch” results in what looks like an
opposite setting, i.e., 0-0-0-0 would look like 1-1-1-1 if the diagram was not replaced.
The following example may help you determine if you have a “0 / 1” DIP switch reversal:
Example :
If you have a 4 micro-switch DIP switch, an address of zero would require 0-0-0-0. Thus, regardless
of what your diagram may look like, the following holds true:
For a slide-type switch … the slides would all be toward “0.”
For a toggle-type switch … the depressed part of the switch would be at “0.”
For a rocker-type switch … the rocker-arm (like a standard light switch) would be toward the “0.”
Please contact the factory if you believe your DIP switch documentation is incorrect.
5-6 Troubleshooting Tips
967094
DBK Option Cards and Modules