Measurement Computing DBK81 - Manual (Page 6)

Card Configuration
Up to sixteen DBK81, DBK82, or DBK83 cards can be attached to a single LogBook or
Daq device, providing up to 224 temperature channels. The cards need not be the same.
For example, you could have ten DBK81 cards, three DBK82 cards, and three DBK83 cards
in one system.
Since multiple cards are connected via a parallel interface, each card must have a unique
channel address. To assign a channel number to the card, locate the 16×2-pin header
(labeled JP1). JP1’s jumper locations are labeled CH0 through CH15. Place the jumper on
the two pins that correspond with the intended channel.
Only one channel configuration jumper is to be used per card.
Each card in the system must have a unique jumper setting.
DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration
Use of a DBK81, DBK82, or DBK83 with a DaqBook/100 Series device, /200 Series device, or an
ISA-type DaqBoard, requires the configuration of jumpers JP1 and JP4 located on the DaqBook or
DaqBoard, as applicable.
1. If not using auxiliary power, set the JP1 jumper for Analog Option Card Use,
also referred to as the expanded analog mode.
Note:
These jumpers do not
apply to /2000 Series
devices.
Required Jumper Settings in DaqBook/100 Series &
DaqBook/200 Series Devices and ISA-Type DaqBoards
The JP1 default position (above) is necessary to power the interface circuitry of the
DBK81, DBK82, and DBK83 cards via the internal ±15 VDC power supply. If using
auxiliary power (e.g., a 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 JP4 jumper in the single-ended
mode.
Note: Analog expansion cards convert all input signals to single-ended voltages that are referenced to
analog common.
DaqBook/2000 Series and DaqBoard/2000 Series Configuration
No jumper configurations are required for the /2000 series devices.
pg. 6, DBK81, DBK82, & DBK83 989494 DBK Option Cards and Modules