microBlox® Signal Splitter
Model uBSP-P-1
Acromag, Inc. Tel: 248-295-0880
- 27 -
http://www.acromag.com
- 27 -
https://www.acromag.com
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.
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
Voltage Output
Current Output
COUNT
0-5V
0-10V
±5V
±10V
0-20mA
4-20mA
0
0V
0V
-5.5V
-11V
0mA
0mA
2979
-5.0V
-10V
10923
4mA
4mA
54612
20mA
20mA
59577
5.0V
10.0V
62556
+5.0V
+10V
65535
5.5V
11.0V
+5.5V
+11V
24mA
24mA
RES
1/59577
1/59577 1/59577 1/59577 1/54612
1/43689
1 lsb
83.925uV
167.8uV
167.8uV
335.7uV
0.34132uA
0.34132uA
%Span
0.001678%
0.001707%
0.002133%
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).