DBK24-Channel Voltage Output Card
Overview …… 1
Hardware Setup …… 2
Card Configuration …… 2
Card Connection …… 2

Software Setup …… 3
Use of CA-115 Cables and DIN5 Power Connectors …… 3
DBK2 – Specifications …… 4This product is not used for LogBook applications.

Reference Notes:
o Chapter 2 includes pinouts for P1, P2, P3, and P4. Refer to pinouts applicable to yoursystem, as needed.
o In regard to calculating system power requirements, refer to DBK Basics located near
the front of this manual.

Overview
The DBK2 provides the ability to generate precise, bipolar output voltages. The DBK2 connects to theDaq device P1 port. Like other P1-compatible DBK cards, the DBK2 is addressed using one of 16 basechannels. Up to 4 DBK2s can share a single base channel for a maximum of 256 channels. The DBK2 cancontrol an array of external devices including programmable power supplies, proportional actuators, analogindicators, and process controllers.
The DBK2 generates output voltages using a 4-channel 14-bit digital-to-analog converter (DAC). A
precision bipolar reference is used onboard to provide accurate and stable output voltages. Each output
channel is independently jumper configurable for either ±5 V or ±10 V operation. A 14-bit DAC can havevalues from 0 to 16,383 (a value of 8192 should produce a voltage of 0). Thus in the ±5 V mode, thevoltage out VOUT = [10 V × (DAC/16383)] - 5 V.

DBK2 Block Diagram

DBK Option Cards and Modules

886995

DBK2, pg. 1

Hardware Setup
Card Configuration
Factory Default: Voltage Range ±5V
The Daq Device channel and the output level must be configured.
A 6-position DIP switch provides for address selection. The card address refers to the Daq device basechannel. Any card address in the range of 0 to 15 is valid. The sub-address allows up to 4 DBK2s to sharea single base channel. Any sub-address in the range of 0 to 3 is valid. (With 4 local channels on a card and4 cards on each of 16 base channels, a maximum of 256 channels are possible.)

DBK2 Configuration Settings
The DIP switch uses binary weighted values. To select the desired address, set the corresponding switch
values to one. For example, if the desired card address is 11, switches 1, 3, & 4 should be set to one. To set
a switch to a value, depress the corresponding side of the rocker-arm switch.
Each local channel can be set for either ±5 V or ±10 V output. Four 3-pin headers (JP1 through JP4)
correspond to output channels 0 through 3. To configure a channel for ±5 V output, place the shunt jumper
across positions 1 & 2 (default setting) of the corresponding header (see figure). To configure a channel for±10 V output, place the shunt jumper across positions 2 and 3 of the channel header.

Card Connection
Output voltage connections are provided via convenient screw terminals or J1. Each terminal has anadjacent analog common terminal for convenience. After all connections are in place, secure the wires tothe card for strain relief. Small nylon tie wraps (not included) work well for this purpose. For convenience,
there are also footprints on the board to accommodate BNC connectors.
DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration
Use of the DBK2 requires setting jumpers in DaqBooks/100 Series & /200 Series andDaqBoards [ISA type].
1.

If not using auxiliary power, place the DaqBook/100 Series & /200 Series or DaqBoard [ISA-type]
JP1 jumper in the expanded analog mode, as indicated for JP1 in the following figure.

Jumper Configurations On DaqBoard [ISA] and DaqBook/100 Series & /200 Series

DBK2, pg. 2886995DBK Option Cards and Modules

Note: JP1, in the previous figure, is indicated in its default position. The default position is necessary topower the interface circuitry of the DBK2 via the internal ±15 VDC power supply.

CAUTION
If using auxiliary power cards, DBK32A or DBK33, you must remove both JP1
jumpers entirely from JP1.
Reference Notes:
oIn regard to calculating system power requirements refer to DBK Basics locatednear the front of this manual.

oRefer to the DBK32A or DBK33 Document Modules if applicable to yourapplication.

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.
2.

Place the JP2 jumper in the SSH position.

3.

For DaqBook/100, DaqBook/112 and DaqBook/120 only, place the JP4 jumper in single-endedmode.

DaqBook/2000 Series & DaqBoard/2000 Series
No jumper configurations are required for these 2000 series devices.

Software Setup
Reference Notes:
o DaqView users - Refer to Chapter 3, DBK Setup in DaqView.
o LogView users - Not Applicable.

Use of CA-115 Cables and DIN5 Power Connectors
CA-115 is a 6-inch cable with a male DIN5 connector on both ends. CA-115 is used to connect DBK32As
or DBK33s in parallel (when powered by a common power supply).

DBK Option Cards and Modules

886995

DBK2, pg. 3

DBK2 – Specifications
Name/Function: 4-Channel Voltage Output CardConnectors: DB37 male, mates with P1. Screw terminals for signal output
Resolution: 14-bits (monotonic)
Output Ranges: ±5 V or ±10 V (jumper selectable per channel)
Accuracy: 0.05% of FS
Linearity: 0.02% of FS
Hysteresis: 0.01% of FS

DBK2, pg. 4886995

DBK Option Cards and Modules