Measurement DBK30A User Manual
DBK30A Rechargeable Battery Module
Overview …… 1
Hardware Setup …… 3
Configuration …… 3
Power …… 3
Charging the Battery Module …… 5
DBK30A – Specifications …… 6
Reference Notes:
o Chapter 2 includes pinouts for P1, P2, P3, and P4. Refer to pinouts applicable to
your system, as needed.
o In regard to calculating system power requirements, refer to DBK Basics located
near the front of this manual.
Overview
DBK30A Front Panel
DBK30A contains two rechargeable nickel-cadmium batteries and shares the same base dimensions as
other LogBook, DaqBook, and related DBK module products, allowing for convenient stacking with
included splice plates and dual-lock tabs.
The included power adapter converts AC power to 24 VDC for charging DBK30A’s two battery packs.
Automatic charging circuits recharge the internal batteries quickly and safely when connected to the
supplied AC adapters. For trouble-free operation you must fully charge the batteries before use. The
charged battery runtime depends on the current load and mode of operation.
An internal slide switch (SW2) determines the unit’s mode. The two modes are:
• 14 VDC Mode (default)
• 28 VDC Mode
You should check the power requirements of each component in your system, and then
verify that the power source can provide sufficient power to meet your runtime
requirements.
Fully charge DBK30A’s batteries before use.
DBK Option Cards and Modules 879795 DBK30A, pg. 1
14 VDC Mode (default)
This mode provides 14 VDC for 3.4 A-hr. The typical battery runtime is from 3 to 6 hours depending on
the load. Unless 28 VDC is required, the 14 VDC mode should be used in your LogBook applications.
Unless you need 28 V, leave the unit in the 14 VDC mode. Use of the 28 VDC mode results in
a lower runtime, as only one battery pack can be used for 14 VDC. When in the 14 VDC mode,
both packs are used in parallel, resulting in a longer runtime for the same application.
28 VDC Mode
The 28 VDC mode actually provides both 14 VDC and 28 VDC. Loop currents for two-wire, 4-20 mA
transmitters (1.7 A-hr) require 28 VDC. The battery run-time typically ranges from 1 to 6 hours, depending
on system configuration. In this mode, 14 VDC is used for unregulated bridge excitation (for bridgeconfigured sensors, such as load cells), and power to DBK expansion products.
Unless you need 28 V, leave the unit in the 14 VDC mode. Use of the 28 VDC mode results
in a lower runtime, as only one battery pack can be used for 14 VDC. When in the 14 VDC
mode, both packs are used in parallel, resulting in a longer runtime for the same application.
DBK30A, pg. 2 879795 DBK Option Cards and Modules
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