Omega Engineering OMB-DBK-34A, User Manual

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3. Connect the other end of the cable to the P1 port of the LogBook or Daq device. For multiple DBK7
cards, use a CA-37-x (or CA-131-x) cable to daisy-chain several cards or an expansion module. For
example, three DBK7s (or 2 DBK7s and an expansion module) can be connected to a LogBook or a
Daq device with a CA-37-3.
4. For multiple cards from a Daq PC-Card, cable CA-134 must first connect to an expansion module (a
CDK10 or a DBK41 with a DBK33 power card) then through a CA-37-x to the DBK7s.
Note : For longer cable runs, use a CA-113 to add 6 ft of cable length where needed.
CE Compliance
If your data acquisition system needs to comply with CE standards , the DBK7 must be placed in a
DBK41/CE 10-slot analog expansion module that is connected to the LogBook or Daq device by a
CA-143-x cable.
Note that in the presence of 3 V/m RF fields, the following conditions must exist in order to meet CE
requirements:
•
500 mVpp signals are required to maintain 0.1% accuracy.
•
Metal shells of the BNC connectors must be directly connected to the chassis ground in order
to maintain 100 mV sensitivity and 0.1% accuracy.
•
The host computer must be properly grounded.
•
The host computer and peripheral equipment must be CE compliant.
Reference Notes : If your data acquisition system needs to comply with CE standards
refer to the following:
o The CE Compliance section of Chapter Signal Management .
o The DBK41 document module.
DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration
Several setup steps of DaqBook/100 Series & /200 Series
devices and DaqBoards [ISA type] are required to use
DBK7 cards in a system.
DaqBook/100 & /200 and
DaqBoard [ISA] Settings for DBK7
1. If not using auxiliary power, place the JP1 jumper in
the expanded analog mode.
Note : This default position is necessary to power the
interface circuitry of the DBK42 via the internal
±15 VDC power supply. If using auxiliary power
(DBK32A/33), you must remove both JP1
jumpers. In regard to calculating system power
requirements refer to
Power Requirements in the
DBK Basics section near the front of the manual.
CAUTION
When using the SSH output, do not use an external voltage reference for DAC1.
Applying an external voltage reference for DAC1, when using the SSH output, will
result in equipment damage due to a conflict on P1, pin #26.
DBK7, pg. 8
879895
DBK Option Cards and Modules