B&R X20AIA744
2 full-bridge strain gauge inputs 5 kHz data output rate for both channels Independently configurable strain gauge factor and filter level for each of the 2 channels This module works with 4-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 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 | 2 full-bridge strain gauge inputs |
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 | 0.7 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 |
| B&R ID code | 0xE50C |
| Status indicators | Channel status, operating state, module status |
| Additional power dissipation caused by actuators (resistive) [W] | +0.72 |
Full-bridge strain gauge
| Input filter / Cutoff frequency | 2.5 kHz |
| 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 "Open circuit" 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 per channel |
| Strain gauge supply / Short-circuit and overload-proof | Yes |
| Quantization / LSB value / 2 mV/V | 1.31 nV |
| Quantization / LSB value / 4 mV/V | 2.62 nV |
| Quantization / LSB value / 8 mV/V | 5.25 nV |
| Quantization / LSB value / 16 mV/V | 10.49 nV |
| Quantization / LSB value / 32 mV/V | 20.98 nV |
| Quantization / LSB value / 64 mV/V | 41.96 nV |
| Quantization / LSB value / 128 mV/V | 83.92 nV |
| Quantization / LSB value / 256 mV/V | 167.85 nV |
| Strain gauge factor | 2 to 256 mV/V, configurable using software |
| Connection | 4-wire connections |
| Input type | Differential, used to evaluate a full-bridge strain gauge |
| Digital converter resolution | 24-bit |
| Conversion time | 200 µs |
| Data output rate | 5000 samples per second and per channel (fDATA) |
| ADC filter characteristics | Sigma-delta, see section "Filter" |
| Operating range / Measurement sensor | 85 to 5000 Ω |
| Influence of cable length | Twisted and shielded conductors, cable length as short as possible, cable routing separate from load circuits, without intermediate terminal to sensor |
| Input protection | RC protection |
| Common-mode range | 0.6 to 3.8 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 | 35 ppm/°C |
| Max. offset drift | 15 ppm/°C |
| Nonlinearity | <10 ppm |
Electrical properties
| Electrical isolation | Bus isolated from analog input and strain gauge supply voltage Channel not isolated from channel and 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 / Storage | -40 to 85°C |
| Temperature / Transport | -40 to 85°C |
| Relative humidity / Operation | 5 to 95%, non-condensing |
| Relative humidity / Storage | 5 to 95%, non-condensing |
| Relative humidity / Transport | 5 to 95%, non-condensing |
Mechanical properties
| Note | Order 1x terminal block X20TB1F separately. Order 1x bus module X20BM11 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
Get a quote for a replacement
Industrial Automation Co. stocks, sources, and repairs B&R parts — new, refurbished, or exchange units with warranty.
Specifications from the official B&R product catalog. Always confirm against the datasheet for your exact revision.