B&R X20CM8281
Digital and analog channels Selectable current and voltage for AI and AO Counter functions The module is a universal mixed module. On this module, digital I/O and analog I/O are combined. A current or voltage signal can be used for the analog I/O as desired. Counter functions on two of the digital inputs expand the range of use.
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Technical specifications
Short description
| I/O module | 4 digital inputs, 2 digital outputs, 1 analog input, 1 analog output, special functions |
General information
| Diagnostics / Module run/error | Yes, using LED status indicator and software |
| Diagnostics / Analog inputs | Yes, using LED status indicator and software |
| Diagnostics / Digital outputs | Yes, using LED status indicator and software (output error status) |
| Power consumption / Bus | 0.01 W |
| Power consumption / Internal I/O | 1.75 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 |
| Certifications / DNV | Temperature: B (0 to 55°C) Humidity: B (up to 100%) Vibration: B (4 g) EMC: B (bridge and open deck) |
| Certifications / CCS | Yes |
| Certifications / LR | ENV1 |
| Certifications / KR | Yes |
| Certifications / ABS | Yes |
| Certifications / BV | EC33B Temperature: 5 - 55°C Vibration: 4 g EMC: Bridge and open deck |
| Certifications / KC | Yes |
| B&R ID code | 0x24C3 |
| Status indicators | I/O function per channel, operating state, module status |
| Additional power dissipation caused by actuators (resistive) [W] | - |
Digital inputs
| Input filter / Hardware | ≤2 µs |
| Input filter / Software | Default 1 ms, configurable between 0 and 25 ms in 0.2 ms increments |
| Switching threshold / Low | <5 VDC |
| Switching threshold / High | >15 VDC |
| Quantity | 4 |
| Nominal voltage | 24 VDC |
| Input characteristics per EN 61131-2 | Type 1 |
| Input voltage | 24 VDC -15% / +20% |
| Input current at 24 VDC | Typ. 3.3 mA |
| Input circuit | Sink |
| Connection type | 1-wire connections |
| Input resistance | Typ. 7.18 kΩ |
| Additional functions | 20 kHz event counting, gate measurement |
| Insulation voltage between channel and bus | 500 Veff |
Event counters
| Quantity | 2 |
| Signal form | Square wave pulse |
| Evaluation | Each negative edge, cyclic counter |
| Input frequency | Max. 20 kHz |
| Counter 1 | Input 1 |
| Counter 2 | Input 3 |
| Counter frequency | Max. 20 kHz |
| Counter size | 16-bit |
Gate time measurement
| Counter frequency / Internal | 48 MHz, 24 MHz, 12 MHz, 6 MHz, 3 MHz, 1.5 MHz, 750 kHz, 375 kHz, 187.5 kHz |
| Quantity | 1 |
| Signal form | Square wave pulse |
| Evaluation | Positive edge - Negative edge |
| Counter size | 16-bit |
| Length of pause between pulses | ≥100 µs |
| Pulse length | ≥20 µs |
| Supported inputs | Input 4 |
Analog inputs
| Digital converter resolution / Voltage | ±12-bit |
| Digital converter resolution / Current | 12-bit |
| Output format / Voltage | INT 0x8001 - 0x7FFF / 1 LSB = 0x0008 = 2.441 mV |
| Output format / Current | INT 0x0000 - 0x7FFF / 1 LSB = 0x0008 = 4.883 µA |
| Input impedance in signal range / Voltage | >1 MΩ |
| Input impedance in signal range / Current | - |
| Load / Voltage | - |
| Load / Current | <300 Ω |
| Permissible input signal / Voltage | Max. ±15 V |
| Permissible input signal / Current | Max. ±50 mA |
| Output of digital value during overload / Undershoot / Voltage | 0x8001 |
| Output of digital value during overload / Undershoot / Current | 0x0000 |
| Output of digital value during overload / Overshoot / Voltage | 0x7FFF |
| Output of digital value during overload / Overshoot / Current | 0x7FFF |
| Max. error / Voltage / Gain | 0.08% |
| Max. error / Voltage / Offset | 0.02% |
| Max. error / Current / Gain | 0 to 20 mA = 0.08% / 4 to 20 mA = 0.1% |
| Max. error / Current / Offset | 0 to 20 mA = 0.03% / 4 to 20 mA = 0.16% |
| Max. gain drift / Voltage | 0.01%/°C |
| Max. gain drift / Current | 0 to 20 mA = 0.009 %/°C 4 to 20 mA = 0.0113 %/°C |
| Max. offset drift / Voltage | 0.002%/°C |
| Max. offset drift / Current | 0 to 20 mA = 0.004 %/°C 4 to 20 mA = 0.005 %/°C |
| Nonlinearity / Voltage | <0.02% |
| Nonlinearity / Current | <0.02% |
| Quantity | 1 |
| Input | ±10 V or 0 to 20 mA / 4 to 20 mA, via different terminal connections |
| Input type | Single-ended |
| Conversion time | 400 µs, conversion runs asynchronous to the X2X Link cycle |
| Output format | INT |
| Input protection | Protection against wiring with supply voltage |
| Conversion procedure | Successive approximation |
| Input filter | Second-order low-pass filter / Cutoff frequency 1 kHz |
| Insulation voltage between channel and bus | 500 Veff |
Digital outputs
| Switching delay / 0 → 1 | <250 µs |
| Switching delay / 1 → 0 | <270 µs |
| Switching frequency / Resistive load | Max. 100 Hz |
| Switching frequency / Inductive load | See section "Switching inductive loads". |
| Quantity | 2 |
| Execution | Current-sourcing FET |
| Nominal voltage | 24 VDC |
| Switching voltage | 24 VDC -15% / +20% |
| Nominal output current | 0.5 A |
| Total nominal current | 1 A |
| Connection type | 1-wire connections |
| Output circuit | Source |
| Output protection | Thermal shutdown in the event of overcurrent or short circuit, integrated protection for switching inductive loads, reverse polarity protection |
| Diagnostic status | Output monitoring with 10 ms delay |
| Leakage current when the output is switched off | 5 µA |
| RDS(on) | 105 mΩ |
| Peak short-circuit current | <14 A |
| Switch-on in the event of overload shutdown or short-circuit shutdown | Approx. 10 ms (depends on the module temperature) |
| Braking voltage when switching off inductive loads | Typ. 50 VDC |
| Insulation voltage between channel and bus | 500 Veff |
Analog outputs
| Max. error / Voltage / Gain | 0.04% |
| Max. error / Voltage / Offset | 0.0225% |
| Max. error / Current / Gain | 0.05% |
| Max. error / Current / Offset | 0.125% |
| Output format / Voltage | INT 0x8001 - 0x7FFF / 1 LSB = 0x0010 = 4.882 mV |
| Output format / Current | INT 0x0000 - 0x7FFF / 1 LSB = 0x0010 = 9.766 µA |
| Load per channel / Voltage | Max. ±10 mA, load ≥ 1 kΩ |
| Load per channel / Current | Max. load is 400 Ω |
| Max. gain drift / Voltage | 0.012%/°C |
| Max. gain drift / Current | 0.014 %/°C |
| Max. offset drift / Voltage | 0.0075% / °C |
| Max. offset drift / Current | 0.03 %/°C |
| Error caused by load change / Voltage | Max. 0.02%, from 10 MΩ → 1 kΩ, resistive |
| Error caused by load change / Current | Max. 0.5%, from 1 Ω → 400 Ω, resistive |
| Quantity | 1 |
| Output | ±10 V or 0 to 20 mA, via different terminal connections |
| Digital converter resolution | 12-bit |
| Conversion time | 300 µs, conversion runs asynchronous to the X2X Link cycle |
| Settling time on output change over entire range | 1 ms |
| Switch on/off behavior | Internal enable relay for startup and errors |
| Output protection | Short-circuit proof |
| Nonlinearity | <0.1% |
| Insulation voltage between channel and bus | 500 Veff |
Electrical properties
| Electrical isolation | Channel isolated from bus Channel not isolated from channel |
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 "Derating". |
| 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 X20TB12 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
Certificates
- 2226379 CSA Certificate of Compliance X20 X67
- 64331_A1 BV Certificate of Compliance X20
- 64331_A1 BV Certificate of Compliance X20(de)
- ABS Certificate of Product Design Assessment - X20 IO Series
- CCS Type Approval Certificate - X20
- Compass Safe Distance Certificate - X20
- E115267 UL Certificate of Compliance X20
- EU Data Act - X20 IO - Connected Product Information Notice
- EU Declaration ATEX X20
- EU Declaration of conformity PLC X20
- FTZU 09 ATEX 0083X
- KR Type Approval Certificate MIL39390-AC003 (X20 System)
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Specifications from the official B&R product catalog. Always confirm against the datasheet for your exact revision.