Measurement Computing DBK Part 2 - Manual (Page 104)

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, if using
auxiliary power, e.g. the DBK32A or the DBK33, you must remove both JP1 jumpers.
Refer to Power Requirements in the DBK Basics section and to the DBK32A and DBK33
sections as applicable.
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 JP3 jumpers in
bipolar mode.
4.
For DaqBook/100, DaqBook/112 and DaqBook/120 only, place the JP4 jumpers in
single-ended mode.
DaqBook/2000 Series and DaqBoard/2000 Series Configuration
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 - Refer to chapter 4, DBK Setup in LogView.
DaqBooks/100 Series & /200 Series devices and DaqBoards [ISA type] must have the
Simultaneous Sample and Hold (SSH) jumper in place when using a DBK50 or DBK51.
DaqView will remind you of this when you exit Hardware Setup with a DBK50 or DBK51
selected.
DBK50 and DBK51 – Specifications
Name/Function: 8-Ch. Isolated Voltage Input Module
Connectors: Male DB37, mates with P1
Inputs: Removable screw terminals
Number of Channels: 8, individually isolated
Isolation:
Channel-to-Channel: 500 V
Channel-to-System: 500 V
Input Impedance:
DBK50: 1 MΩ
DBK51: >10 MΩ
Bipolar Input Ranges:
DBK50: ±10 V, ±100 V, ±300 V
DBK51: ±100 mV, ±1 V, ±10 V
Output Voltage Range: ±5 VDC
Accuracy:
Without Offset Correction: 1% of range
With Offset Correction: 0.2% of range
Offset: ±50 mV max
Noise:
With Low-Pass Filter: <5 mV peak to peak
Without Low-Pass Filter: <50 mV peak to peak
Temperature Coefficient: 0.2 mV/°C
Attenuation Ratios: V
out
= V
in
/ K
DBK50:
10 V K = 2.0 gain = 0.5
100 V K = 20.0 gain = 0.05
300 V K = 60.0 gain = 0.0166
DBK51:
0.1 V K = 0.02 gain = 50
1 V K = 0.2 gain = 5
10 V K = 2.0 gain = 0.5
Bandwidth: 20 kHz (LPF bypassed)
Low-Pass Filter: Factory installed 3-pole, 3.5Hz
(bypass or user-set)
Operating Power Voltage Range: +9 to +20 VDC
Module Power Requirements: 7.5 W
AC Adapter Rating: 15 VDC @ 0.9 A
Dimensions: 285 mm W x 221 mm D x 36 mm H
(11” x 8.5” x 1.375”)
Weight: 1.7 kg (4 lbs)
DBK50 and DBK51, pg. 4 989594 DBK Option Cards and Modules