Measurement Computing 200 Series DaqBook - Manual (Page 46)

pg. 10, DBK Basics 02-13-02 Daq Systems
DBK30A module - provides power at 14 and 28 VDC with a rated capacity of 3.4 A-hr @ 14 VDC.
The DBK30A’s 28 V output will power 4 to 20 mA transducers. The module’s rechargeable power supply can power
DBK modules in situations where AC mains are not available.
Note: Some transducers (e.g., 2-wire 4-20 mA transmitters, bridge-configured sensors, etc) require an
excitation voltage in order to work properly. The DBK30A supplies 14 and 28 VDC. Consult
transducer documentation before applying power.
DBK32A - provides ±15 VDC @ 500 mA. DBK33 - provides ±15 VDC @ 250 mA and +5 VDC @ 1000 mA.
The DBK32A and DBK33 power cards attach directly to the P1 analog expansion bus where they supply power
to DBK analog expansion cards. The DBK32A and the DBK33 can be powered from an included AC adapter,
an optional DBK30A battery module, or from a +10 to +20 VDC source such as a car battery.
When installed in a DBK10 three-slot expansion chassis, the DBK32A or DBK33 supplies power to
the analog DBK [that is to receive power] via a CA-37-x cable.
If used with the DBK41 ten-slot expansion enclosure, the DBK32A or DBK33 installs into one of the analog
expansion slots on the DBK41’s backplane. A power card in any DBK41slot (other than the leftmost, when
viewed from the rear) will power the other cards that are connected to the DBK41’s backplane.
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If using a DBK32A or a DBK33 with a DaqBook or DaqBoard [ISA type], you must
entirely remove the shunt jumpers from JP1. Failure to do so will result in damage to the
8254 timer chip. Refer to the power card document modules and to the Daq device
Hardware sections of the DaqBook and DaqBoard [ISA] user’s manuals for JP1 location
and configuration.
DBK34 module – provides 12 or 24 VDC with a 5.0 or 2.5 A-hr capacity (respectively). This module is an
Uninterruptable Power Supply (UPS) that can be used for in-vehicle testing where the vehicle’s electrical
system will not affect acquisition device power during starter-current surge, or power-off.
DBK34A module – provides 12 or 24 VDC with a 5.0 or 2.5 A-hr capacity (respectively). This device is
classified as a UPS / Battery module. It is an improved version of the earlier DBK34. Like the DBK34, the
DBK34A can be used for in-vehicle testing where the vehicle’s electrical system will not affect acquisition
device power during power during starter-current surge, or power-off.