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Include the complete B&R X20AT2222 marking and any hardware revision on the item. Include the installed rack/bus arrangement and actual hardware revision.
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Technical specifications for X20AT2222
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Manufacturer:B&R
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Product Category:PLC Systems
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Spare Part Number:X20AT2222
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Weight:0.02 kg
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Tariff Code:8537101190
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Input channels:2
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Sensor types:Pt100 / Pt1000
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Sensor range:-200.0 to 850.0 degrees C
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Temperature resolution:0.1 degrees C
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Converter:16-bit sigma-delta
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Measurement current:250 microamps +/-1.25%
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Filter time:1-66.7 ms; configurable
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Resistance ranges:0.1-4500 ohms /0.05-2250 ohms
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Input filter:First-order;500 Hz
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Isolation:Channels to bus; not between channels
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Bus power:0.01 W
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Internal I/O power:1.1 W
Information
Overview
Downloads
Applications / Compatibility
Product Precautions
- B&R X20AT2222 connects its configured field signals and diagnostic states to the automation task. Correct operation depends on retaining the installed hardware selection and the application settings together.
Input channels: 2
Sensor types: Pt100 / Pt1000
Sensor range: -200.0 to 850.0 degrees C
Sensor types: Pt100 / Pt1000
Sensor range: -200.0 to 850.0 degrees C
Each channel can select Pt100 or Pt1000 sensing, while the two- or three-wire arrangement is configured for the module. Internal linearization converts the sensor resistance to temperature with 0.1 degree resolution. Direct resistance measurement is also available in two ranges.
The 16-bit sigma-delta converter uses a constant measurement current of 250 microamps. Filter time is configurable from 1 to 66.7 ms. At the 50 Hz filter setting, conversion is 20 ms for one channel and 80 ms for two channels; these timings must be considered separately from the controller task period.
Input monitoring distinguishes lower limit, upper limit and open-circuit conditions. Invalid and fault values must be interpreted with the channel status rather than as real temperatures. Channels are isolated from the bus, but not from each other; terminal block and bus module are separate system components.
The 16-bit sigma-delta converter uses a constant measurement current of 250 microamps. Filter time is configurable from 1 to 66.7 ms. At the 50 Hz filter setting, conversion is 20 ms for one channel and 80 ms for two channels; these timings must be considered separately from the controller task period.
Input monitoring distinguishes lower limit, upper limit and open-circuit conditions. Invalid and fault values must be interpreted with the channel status rather than as real temperatures. Channels are isolated from the bus, but not from each other; terminal block and bus module are separate system components.
Controller platform reference: B&R X20 temperature measurement. Retain the installed hardware and application configuration.
The original technical excerpt for B&R X20AT2222 covers identity, interface limits and configuration behavior. The separate installation guide covers configuration retention, reconnection, functional tests and diagnostic recovery.
X20AT2222 Official Technical Excerpt
The original technical excerpt for B&R X20AT2222 covers identity, interface limits and configuration behavior. PDF · 10 pages.X20AT2222 Installation & Verification Guide
Apter Power installation and verification guide covering configuration retention, reconnection, functional tests and diagnostic recovery. PDF · 5 pages.
Original manufacturer pages retain their technical context. Use the Apter Power guide with the applicable manufacturer instructions and approved installation design.
System and supply context: X20AT2222 operates within its compatible B&R rack or X20 arrangement. Storage, bus modules, terminal blocks and field devices are separate unless included in the quotation.
Application scope: Apply the exact hardware and software configuration to the assigned machine function. A similar connector or base family is insufficient to establish replacement compatibility.
Application scope: Apply the exact hardware and software configuration to the assigned machine function. A similar connector or base family is insufficient to establish replacement compatibility.
Configured machine function
Each channel can select Pt100 or Pt1000 sensing, while the two- or three-wire arrangement is configured for the module. Internal linearization converts the sensor resistance to temperature with 0.1 degree resolution. Direct resistance measurement is also available in two ranges.Interface continuity
Connect sensor and sense leads according to the original wiring scheme. Maintain the intended lead-compensation arrangement for three-wire measurement.Diagnostic acceptance
Check the application response to an approved open-circuit or range simulation. Confirm that status and substitute values do not become valid process temperatures.Controlled restoration
Allow the selected filter and conversion cycle to settle. Compare both channels under stable input rather than assuming the controller cycle equals conversion time.
Prepare B&R X20AT2222 for its configured installation using these checks.
Capture sensor and mode assignments
Record each channel sensor type and the module-wide two-/three-wire setting. Preserve the resistance or temperature operating mode, filter and assigned process point.
Put temperature-dependent control in maintenance
Prevent the affected loops from acting on disconnected-sensor fault values. Use the approved machine maintenance state and module exchange procedure.
Inspect the sensor circuit
Check for open circuits, damaged leads and incorrect two-/three-wire routing. Channel-to-channel isolation is not available to correct a wiring-reference error.
Restore the configuration
Load the retained sensor types, connection method and filter setting. Do not select Pt1000 solely to compensate for an incorrect resistance reading.
Test with known sensor values
Apply an approved resistance or temperature reference and compare both channel values. Use the configured range and 0.1 degree temperature resolution when assessing results.
Confirm timing and stable readings
Allow the selected filter and conversion cycle to settle. Compare both channels under stable input rather than assuming the controller cycle equals conversion time.
Alternative Names
B&R X20AT2222
Technical notes
Measurement status: Treat the channel status and measured value as one result. Fault and out-of-range substitutions must be handled before the value is used by the application.
Filter trade-off: Choose the measurement filter with both mains-frequency rejection and channel update time in mind; the fastest setting is not automatically the best temperature measurement setting.
FAQ View All FAQ
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Can X20AT2222 use Pt100 on one channel and Pt1000 on the other?Yes. Sensor type is configurable per channel. The two-/three-wire connection arrangement is configured for the module.
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What temperature increment is represented by X20AT2222?Temperature values have a 0.1 degree Celsius resolution for both Pt100 and Pt1000 sensing.
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How does the 50 Hz filter affect conversion on X20AT2222?The conversion time is 20 ms for one channel and 80 ms for two channels at the 50 Hz filter setting.
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Can X20AT2222 report resistance directly instead of temperature?Yes. Direct resistance ranges are 0.1-4500 ohms and 0.05-2250 ohms, depending on the configured operating mode.
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What excitation does X20AT2222 apply to the sensor circuit?The resistance measurement uses a 250 microamp constant current with a specified tolerance of+/-1.25%.
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Are the two input channels of X20AT2222 isolated from one another?No. The channel side is isolated from the bus, but channel-to-channel isolation is not provided.
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Why must software check status as well as the value from X20AT2222?Open circuit, range errors and invalid conversions use defined substitute digital values. Interpreting only the numerical value can mistake a fault code for temperature.
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Which terminal blocks can be used with X20AT2222?X20TB06 is the intended 6-pin block; X20TB12 may also be used. The selected bus module and terminal block must be included separately in the system arrangement.
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