Omega Engineering OMB-DBK-34A, User Manual

Page: 166 / 250

Card Connection
1. Connect the signal input wires to the appropriate screw terminals. The DBK15 is equipped with
screw terminal connectors for easy access to inputs and ground access points. Connectors are
provided for 16 differential inputs and are labeled by channel number and H and L for high and low
analog inputs. On board, there are 100K
Ω
bias resistors in the CL locations per channel (the CH
locations are not used). These resistors can be removed if desired.
The DBK15 card only supports differential inputs (not single-ended). Connect the
high end of the signal to the High input and the low end to the Low input of the
desired channel. Ground referencing to Analog Common is important for optimum
accuracy.
2. Use tie wraps (not included) and the board’s edge-holes to secure all wires in a way that will not
allow mechanical stress to affect the signal connection. In other words, be sure to provide a degree
of slack, or “strain-relief.”
DaqBook/100 Series & /200 Series and DaqBoard [ISA-Type] Configuration
Use of the DBK15 requires setting jumpers in DaqBooks/100 Series & /200 Series and
DaqBoards [ISA type].
1. If not using auxiliary power, place the JP1 jumper in the expanded analog mode.
Single-Ended Bipolar
Factory Default Factory Default
JP4 JP1 JP3
-15 V
-OCTOUT
-OCLKIN
+15 V
Analog Option
Card Use
DaqBook/100 Series & /200 Series and DaqBoard[ISA-Type] Jumpers for the DBK15
Note : The JP1 default position is necessary to power the interface circuitry of the DBK5 via the internal
±15 VDC power supply. If using auxiliary power (e.g., DBK32A or DBK33), you must remove
both JP1 jumpers. Refer to
Power Requirements in the DBK Basics section and to the DBK32A
and DBK33 sections as applicable.
2. For DaqBook/100, DaqBook /112 and DaqBook /120 only , place the JP3 jumper in Bipolar mode .
3. For DaqBook/100, DaqBook /112 and DaqBook /120 only , place the JP4 jumper in single-ended
mode .
Note : Analog expansion cards convert all input signals to single-ended voltages referenced to analog
common.
DaqBook/2000 Series and DaqBoard/2000 Series Configuration
No jumper configurations are required for these /2000 series devices.
DBK15, pg. 4
889094
DBK Option Cards and Modules