DBK44

2-Channel Multi-Purpose Isolated Signal Conditioning
Features• Accepts two 5B isolated input signal
conditioning modules of any type• Features on-board screw-­t erminal
signal connections, plus cold-­junction
sensors for thermocouple ­applications
The DBK44 two-channel multi-purpose
isolated signal conditioning card accommodates two multi-purpose isolated signal
conditioning modules of any type*. Eachuser-configurable signal conditioning
module offers 500V isolation from thesystem and from other channels. It canaccommodate an array of signals—from
low-level thermocouple ­signals to strain
gage signals.
The DBK44 features screw terminals thatprovide access to each channel’s analog
inputs, as well as to the excitation output
if the card is used with a strain gage or RTD
module. In addition, each DBK44 channel
has a cold-junction sensor mounted adjacent to each screw-terminal block. This
­permits 5B thermocouple modules to output
linearized and compensated temperature,eliminating the need for any components
other than the user-supplied thermocouple.
The A/D scans the DBK44’s channels at thesame 5 or 10 µs/channel rate that they scan
all DBK Series analog ­expansion and signal­conditioning cards.
Expansion Enclosures. The DBK44 canbe housed in a variety of ways, such as
in the DBK10 three-slot expansion-card
enclosure, or the DBK41 ten-slot analog
expansion module. Also, it can be mounted
anywhere outside the data acquisition
system, such as in a snap track or withstand offs.

The DBK44 accepts two 5B isolated input signal conditioning modules of any type

DBK44 Expansion Examples

P1

P2

Notebook PC

Notebook PC

Ethernet

EthernetDaqBook

DaqBook

P3

P1P2

P3

CA-255-4T

CA-255-2T
DBK10 enclosure
with DBK44 and otheranalog expansion cards
installed

P1CA-37-2

Powering the DBK44. The A/D mainframe
can provide power for the DBK44 via theirP1 connector. DaqBoards, which draw
power from the host PC, can power anexternal signal conditioning card via their­internal power supply. The 5B modules
used with the DBK44 typically require
5V at 30 mA minimum and can demand
up to 175 mA in ­applications requiring­excitation voltages.

DBK41 enclosure
with DBK44 and otheranalog expansion cards
installed

Please, note that for applications thatdemand more than 4 isolated channels,
it is more economical to use the DBK42
16-channel isolated module, which­includes a built-in power supply that
can accommodate any combination of
up to sixteen 5B modules of any choice.

* 5B modules must be purchased separately. All sales
are final with no right of return.

Measurement Computing(508) 946-5100

1

info@mccdaq.com

mccdaq.com

DBK44

Specifications & Ordering Information
Specifications

5B modules

Connector: DB37 male, mates with P1*; screw terminals for signal inputs
User Connections: 4 screw-terminals/channel;
2 screw-terminals for external 5 VDC
Isolation
Input Power to DaqBoard: 0V
Signal Inputs to DaqBoard: 1500 VDC
Input Channel-to-Channel: 500 VDC
Signal Modules: Any 5B Series input module; coldjunction sensors for T/C modules are located byeach channel terminal block; plug-in locations for
Current Loop sensing resistors are provided foreach channel
Module Capacity: 2 (input only) 5B modules
Weight: 0.25 kg (8 oz) with no modules installed
DC Input Fuse: 4A
Power Consumption:  330 mW
Note: Only modules with ±5V or 0-5V ouput
should be used.

Ordering Information
Description
2-channel 5B expansion card

Part No.
DBK44Cables
For use with DBK10, use CA-37-x ribbon cable, orcontact factory of additional cabling options
For use with DBK60 or LogBook/360, no cable isrequired (except from DBK60 or LogBook/360 tothe A/D mainframe)
For use with no enclosure, use CA-37-x where x is thenumber of DBK devices attached
For use with DaqLab Series (internal slots), use
CA-255-2T with one board, or CA-37-2 for use with
two DBK cards (or contact factory for additionalcabling options)

Product Compatibility✔ LogBook✔ DaqBook✔ DaqLab✔ DaqScan✔ DaqBoard/2000 Series* Attachment to the DaqBoard/2000 Series requires a DBK200, DBK202, DBK203A, DBK209, DBK213, orDBK214

Measurement Computing(508) 946-5100

2

info@mccdaq.com

mccdaq.com