Measurement-computing DBK50 User Manual download pdf

DBK50 and DBK51 8-Channel Isolated Voltage Input Modules

Overview …… 1

Input Attenuation/Gain Factors …… 2

Hardware Setup …… 2

Signal-to-Module Connection …… 2

Module Configuration …… 2

DaqBook/100 Series & /200 Series and DaqBoard [ISA type] Configuration …… 3

DaqBook/2000 Series and DaqBoard/2000 Series Configuration …… 4

Software Setup …… 4

DBK50 and DBK51 – Specifications …… 4

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

Except for their ranges, the DBK50 (high-voltage) and the DBK51 (low-voltage) are identical. Both have

eight channels isolated from themselves (750 V) and from the LogBook or Daq Device analog common

(1250 V). Each channel’s input impedance is over 10 M

Ω to minimize loading of the circuit being

measured. Voltages can be read from DC to more than 20 kHz. One of three voltage ranges can be chosen

via software:

• for DBK50: ±10 V, ±100 V, or ±300 V.

• for DBK51: ±100 mV, ±1 V, or ±10 V.

With standard plug-in attenuator assemblies, the voltage ranges are interchangeable. The gain or

attenuation factor depends on the range, but the full-scale output for any range is +5 V.

Note: A fourth “range” delivers a shorted input voltage reading to allow offset compensation in some

applications.

DBK Option Cards and Modules 989594 DBK50 and DBK51, pg. 1

1 2 3 4

DBK50 and DBK51 8-Channel Isolated Voltage Input Modules Overview …… 1 Input Attenuation/Gain Factors …… 2 Hardware Setup …… 2 Signal-to-Module Con

Input Attenuation/Gain Factors Gain and attenuation may be calculated using the formula: Input Range Function K 300 V Range Attenuates 60 100 V

Channel Filter Jumper Settings for DBK50 and DBK51 The low-pass filters have a default corner frequency of 3.5 Hz when the jumpers are in the LPF-s

To power the interface circuitry of the DBK50 [or DBK51] via the internal ±15 VDC power supply, JP1 must be set to “Analog Option Card Use.” However

Related models: DBK51

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