B&R X20cAI1744-3
1 full-bridge strain gauge input Data output rate configurable from 0.1 Hz to 7.5 kHz Special operating modes (synchronous mode and multiple sampling) Configurable filter level This module works with both 4-wire and 6-wire strain gauge load cells. The concept applied by the module requires compensation in the measurement system. This compensation eliminates the absolute uncertainty in the measurement circuit, such as component tolerances, effective bridge voltage or zero point offset. The measurement precision refers to the absolute (compensated) value, which will only change as a result of changes in the operating temperature.
Lifecycle & replacement
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Technical specifications
Short description
| I/O module | 1 full-bridge strain gauge input |
General information
| Diagnostics / Module run/error | Yes, using LED status indicator and software |
| Diagnostics / Open circuit | Yes, using LED status indicator and software |
| Diagnostics / Input | Yes, using LED status indicator and software |
| Power consumption / Bus | 0.01 W |
| Power consumption / Internal I/O | 0.5 W |
| Certifications / CE | Yes |
| Certifications / UKCA | Yes |
| Certifications / CRA (Cyber Resilience Act) | In preparation |
| Certifications / ATEX | Zone 2, II 3G Ex nA nC IIA T5 Gc IP20, Ta (see X20 user's manual) FTZÚ 09 ATEX 0083X |
| Certifications / UL | cULus E115267 Industrial control equipment |
| Certifications / HazLoc | cCSAus 244665 Process control equipment for hazardous locations Class I, Division 2, Groups ABCD, T5 |
| B&R ID code | 0xEB00 |
| Status indicators | Channel status, operating state, module status |
| Additional power dissipation caused by actuators (resistive) [W] | Max. +0.36 |
Full-bridge strain gauge
| Input filter / Cutoff frequency | 5 Hz |
| Input filter / Order | 3 |
| Input filter / Slope | 60 dB |
| Output of digital value / Broken bridge supply line | Value approaching 0 |
| Output of digital value / Broken sensor line | Value approaching ±end value (status bit "Line monitoring" is set in register "Module status") |
| Output of digital value / Valid range of values | 0xFF800001 to 0x007FFFFF (-8,388,607 to 8,388,607) |
| Strain gauge supply / Voltage | 5.5 VDC / Max. 65 mA |
| Strain gauge supply / Short-circuit and overload-proof | Yes |
| Strain gauge supply / Voltage drop for short-circuit protection | Max. 0.2 VDC at 65 mA and 25°C |
| Quantization / LSB value (16-bit) / 2 mV/V | 336 nV |
| Quantization / LSB value (16-bit) / 4 mV/V | 671 nV |
| Quantization / LSB value (16-bit) / 8 mV/V | 1.343 µV |
| Quantization / LSB value (16-bit) / 16 mV/V | 2.686 µV |
| Quantization / LSB value (16-bit) / 32 mV/V | 5.371 μV |
| Quantization / LSB value (16-bit) / 64 mV/V | 10.74 μV |
| Quantization / LSB value (16-bit) / 128 mV/V | 21.48 μV |
| Quantization / LSB value (16-bit) / 256 mV/V | 42.97 μV |
| Quantization / LSB value (24-bit) / 2 mV/V | 1.31 nV |
| Quantization / LSB value (24-bit) / 4 mV/V | 2.62 nV |
| Quantization / LSB value (24-bit) / 8 mV/V | 5.25 nV |
| Quantization / LSB value (24-bit) / 16 mV/V | 10.49 nV |
| Quantization / LSB value (24-bit) / 32 mV/V | 20.98 nV |
| Quantization / LSB value (24-bit) / 64 mV/V | 41.96 nV |
| Quantization / LSB value (24-bit) / 128 mV/V | 83.92 nV |
| Quantization / LSB value (24-bit) / 256 mV/V | 167.85 nV |
| Strain gauge factor | 2 to 256 mV/V, configurable using software |
| Connection | 4- or 6-wire connections |
| Input type | Differential, used to evaluate a full-bridge strain gauge |
| Digital converter resolution | 24-bit |
| Conversion time | Depends on the configured data output rate |
| Data output rate | 0.1 - 7500 samples per second, configurable using software (fDATA) |
| ADC filter characteristics | Sigma-delta, see section "Filter characteristics of the sigma-delta A/D converter" |
| Operating range / Measurement sensor | 85 to 5000 Ω |
| Influence of cable length | See section "Calculation example". |
| Input protection | RC protection |
| Common-mode range | 0 to 3 VDC Permissible input voltage range (with regard to the electric potential strain gauge GND) on inputs "Input +" and "Input -" |
| Insulation voltage between input and bus | 500 Veff |
| Conversion procedure | Sigma-delta |
| Max. gain drift | 12 ppm/°C |
| Max. offset drift | 2 ppm/°C |
| Nonlinearity | <10 ppm |
Electrical properties
| Electrical isolation | Bus isolated from analog input and strain gauge supply voltage Channel not isolated from I/O power supply |
Operating conditions
| Mounting orientation / Horizontal | Yes |
| Mounting orientation / Vertical | Yes |
| Installation elevation above sea level / 0 to 2000 m | No limitation |
| Installation elevation above sea level / >2000 m | Reduction of ambient temperature by 0.5°C per 100 m |
| Degree of protection per EN 60529 | IP20 |
Ambient conditions
| Temperature / Operation / Horizontal mounting orientation | -25 to 60°C |
| Temperature / Operation / Vertical mounting orientation | -25 to 50°C |
| Temperature / Derating | See section "Hardware configuration" |
| Temperature / Starting temperature | Yes, -40°C |
| Temperature / Storage | -40 to 85°C |
| Temperature / Transport | -40 to 85°C |
| Relative humidity / Operation | Up to 100%, condensing |
| Relative humidity / Storage | 5 to 95%, non-condensing |
| Relative humidity / Transport | 5 to 95%, non-condensing |
Mechanical properties
| Note | Order 1x terminal block X20TB12 separately. Order 1x bus module X20cBM11 separately. |
| Pitch | 12.5⁺⁰.² mm |
Documentation & CAD
Files hosted by B&R Industrial Automation; links open the official download page.
Datasheets
Manuals
ECAD / EPLAN
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Specifications from the official B&R product catalog. Always confirm against the datasheet for your exact revision.