6B12/6B12HV Isolated, Field Configurable Analog Input
6B12/6B12HV Isolated, Field Configurable Analog Input
The 6B12 and 6B12HV are single-channel isolated signal-conditioning modules which receive millivolt, 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.
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 millivolt and voltage ranges from ±150 mV to ±50 V as well as 0 to ±20 mA process current inputs. Software is used to configure 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.
Inside the 6B12 and 6B12HV
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. The 6B12 and 6B12HV use compensation factors to ensure the highest accuracy possible.
Figure 1. 6B12/6B12HV Functional Block Diagram |
Figure 2. 6B12 and 6B12HV Field Connection Diagram |
Inputs |
Communications |
Millivolt: ±150 mV to ±500 mV
Voltage: ±1 V; ±50 V Current: ±20 mA |
RS-485-Interface |
Range Description (Software Configurable) |
Accuracy1 (Typical) |
Error (Maximum) |
Noise (Peak to Peak) |
±150 mV |
±0.03 % FS |
±0.06 % FS |
±0.02 % FS |
±500 mV |
±0.01 % FS |
±0.04 % FS |
±0.008 % FS |
±1 V | ±0.006 % FS | ±0.03 % FS | ±0.007 % FS |
±5 V | ±0.006 % FS | ±0.03 % FS | ±0.006 % FS |
±10 V | ±0.006 % FS | ±0.03 % FS | ±0.005 % FS |
±50 V | ±0.006 % FS | ±0.03 % FS | ±0.004 % FS |
±20 mA1 | ±0.006 % FS2 | ±0.03 % FS2 | ±0.007 % FS |
1 This range requires the use of a 50 Ω current-to-voltage conversion resistor, model AC1381.
2 Does not include the error of the current-to-voltage input resistor, Model AC1381.
6B12 and 6B12HV Specifications
(typical @ +25°C and Vs = +5 V dc)
1 When used with the CJC temperature sensor, model AC1361, provided on each channel of 6B Series backplanes.
(typical @ +25°C and Vs = +5 V dc)
Description |
Model 6B12 and 6B12HV |
Inputs, Software Selectable |
|
Voltage Ranges |
|
mV |
±15 mV to ±500 mV |
Volt | ±1 V; ±5 V; ±10 V; ±50 V |
Current Range |
±20 mA |
Communications |
|
Protocol | RS-485 |
Baud Rates, Software Selectable |
300K, 600K, 1.2K, 2.4K. 9.6K, 19.2K |
Accuracy | |
Initial @ +25°C |
Refer to Model Table |
Input Offset vs. Temperature |
±0.3 µV/°C |
Span vs. Temperature |
±10 ppm/°C (±50 ppm/°C, maximum) |
Input Resistance |
1 MΩ |
Bandwidth, -3 dB | 4 Hz |
Conversion Rate |
9 samples /second |
Synchronized Sampling Command | Yes |
Conversion Time | 70 ms maximum |
Common-Mode Voltage (CMV) | |
Input-to-Output and Power |
|
Model 6B12 |
1500 V rms continuous |
Model 6B12HV |
2500 V rms continuous |
Common-Mode Rejection (CMR) |
|
1 kΩ Source Imbalance @ 50/60 Hz |
108 dB |
Normal Mode Rejection (NMR) | |
1 kΩ Source Imbalance @ 50/60 Hz |
56 dB |
Input Protection | 240 V rms, continuous |
Input Transient Protection | ANSI/IEEE C37.90.1-1989 |
Power Supply | |
Voltage, Operating | +5 V dc ±5% |
Voltage, maximum safe limit |
+6.5 V dc |
Current |
+100 mA |
Mechanical Dimensions | 2.3" x 3.1" x 0.79" (58.4 mm x 78.7 mm x 19.1 mm) |
Environmental | |
Temperature Range | |
Rated Performance |
-25°C to +85°C |
Operating |
-25°C to +85°C |
Storage |
-40°C to +85°C |
Relative Humidity | 0 to 95% @ +60°C noncondensing |
1 When used with the CJC temperature sensor, model AC1361, provided on each channel of 6B Series backplanes.
Specifications subject to change without notice.