6B12 / 6B12HV
GENERAL DESCRIPTION
the 6B12 and 6B12HV modules for address, input range, baud
rate data format, checksum status and integration time. All
programmable parameters are stored in the nonvolatile
memory of the module.
The 6B12 and 6B12HV are single-channel isolated signal-
conditioning modules which receive milli-volt, voltage and
process current signals. Unlike conventional signal conditioners,
the 6B12 and 6B12HV are complete microcomputer-based data
acquisition systems. A major advantage of the on-board
microcontroller is its ability to be reconfigured for various
sensor types and input ranges.
Each analog input signal is conditioned and scaled by a
programmable-gain amplifier and digitized by a 16-bit
integrating converter under microprocessor control. The
digitized value is passed serially across a magnetically isolated
barrier (1500 V rms – Model 6B12, 2500 V rms – Model
6B12HV) and clocked in by a custom controller chip. The on-
board microprocessor then converts the data into engineering
units as determined by the channel parameters. In between
conversions, the microprocessor auto zeros the offset and gain
by monitoring the on-board temperature and compensating for
reference drift. Cold junction compensation (CJC) is also
performed at this stage. The 6B12 and 6B12HV use
Synchronized Sampling – The synchronized sampling
command allows data to be sampled simultaneously from all
6B11, 6B11HV, 6B12, 6B12HV modules and all 6B50 boards in a
6B Series system. Each module or board stores the data in a
separate register within its microcontroller and can access the
data with a separate command.
Software Configuration – The 6B12 and 6B12HV digitize milli-
volt and voltage ranges from +150 mV to +50 V as well as 0 to
+20 mA process current inputs. Software is used to configure
compensation factors to ensure the highest accuracy possible.
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