Split Analog Outputs - Acromag microBlox uBSP-P-1 User Manual

microBlox® Signal Splitter

Split Analog Outputs

There are two isolated output
channels at TB3 (CH1) and TB4
(CH2). Each output channel
has separate terminals for
voltage and current.
While this splitter also supports
Bluetooth wireless technology
enabled input models, its
functionality as a splitter
cannot be configured
wirelessly, only via wired USB.
Acromag, Inc. Tel: 248-295-0880
http://www.acromag.com
Output Range Selection: Separate isolated output channels are located at TB3 (CH1)
and TB4 (CH2). Each output channel has separate voltage and current output
terminals that share a return terminal. Only one output signal, voltage or current,
may be loaded per output channel at one time. Supported output ranges with over-
range are shown in Table 2 below.
Output Resolution: Each output is driven by a 16-bit voltage/current DAC, Texas
Instruments DAC8760IPWPR. The resolution per nominal output range is indicated
in the Table 2 below. Note that nominal ranges may be rescaled in the unit and
resolution will drop 1 bit for every halving of the range. The actual I/O resolution of
a unit will be the lowest resolution of the input module, and output D/A relative to
the selected/scaled I/O range.
16-bit TABLE 2: OUTPUT RANGES AND RESOLUTION w/OVER-RANGE
DAC
COUNT 0-5V
0 0V
2979
10923
54612
59577 5.0V
62556
65535 5.5V
RES 1/59577
1 lsb 83.925uV
%Span
Note: Scaling uB module inputs and rescaling splitter outputs smaller than their
nominal ranges can increase potential error as the I/O resolution and input signal-to-
noise ratio are diminished for very small input spans. In general, rated accuracy can
be achieved for effective I/O resolution equal or greater than 12-bit (1/4096).
Output Load: The voltage output can drive loads down to 1KΩ minimum (5mA
max). The current output can drive 21mA DC into 0-525Ω.
Output Accuracy: Better than 0.05% of span, typical, ±0.1% maximum, with
nominal input and output ranges and minimum 12-bit scaled I/O resolution
(1/4096). This includes the effects of repeatability, terminal point conformity, and
linearization, but does not include sensor error.
Output Noise/Ripple: Less than 0.1% of output span, typical.
Note (High Speed Acquisition): Additional filtering at the load is recommended for
sensitive applications with high-speed acquisition rates. For excessive 60Hz supply
ripple with current output, a 1uF or larger bulk capacitor is recommended at the
load. High frequency noise is often reduced or eliminated by placing a 0.1uF or
0.01uF capacitor directly across the load (this can also raise RF immunity).
Output Ambient Temperature Drift: Better than 80ppm/C (±0.0080%/C) over
the ambient temperature range. This includes the combined effect of zero and span
drift for reference test conditions (see Input Specifications).
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Voltage Output
0-10V ±5V ±10V
0V -5.5V -11V
-5.0V -10V
10.0V
+5.0V +10V
11.0V +5.5V +11V
1/59577 1/59577 1/59577
167.8uV 167.8uV 335.7uV
0.001678%
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Model uBSP-P-1
Current Output
0-20mA 4-20mA
0mA 0mA
4mA 4mA
20mA 20mA
24mA 24mA
1/54612 1/43689
0.34132uA 0.34132uA
0.001707% 0.002133%
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