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X20CM8281

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B&R X20CM8281 is a universal mixed I/O module combining four digital inputs, two digital outputs, one analog input, one analog output, and counter functions for the X20 System.
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Ships by Wednesday, October 28
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Technical specifications for X20CM8281

  • Manufacturer:
    B&R
  • Part Number:
    X20CM8281
  • Product Family:
    B&R X20 System
  • Product Type:
    Universal Mixed I/O Module
  • Stock:
    1
  • Digital inputs:
    4 sink inputs, 24 VDC
  • Digital input filter:
    Default 1 ms; configurable 0 to 25 ms in 0.2 ms increments
  • Digital outputs:
    2 current-sourcing FET outputs, 24 VDC, 0.5 A each
  • Analog input:
    1 single-ended input, ±10 V or 0 to 20 mA / 4 to 20 mA
  • Analog input resolution:
    Voltage ±12-bit; current 12-bit
  • Analog input conversion time:
    400 µs, asynchronous to X2X Link cycle
  • Analog output:
    1 output, ±10 V or 0 to 20 mA
  • Analog output resolution:
    12-bit
  • Analog output conversion time:
    300 µs, asynchronous to X2X Link cycle
  • Event counters:
    2 cyclic 16-bit counters, maximum 20 kHz
  • Gate-time measurement:
    1 input, 16-bit counter
  • Analog conversion procedure:
    Successive approximation
  • Required terminal block:
    X20TB12, ordered separately
  • Compatible bus modules:
    X20BM11 or X20BM15, ordered separately
  • Degree of protection:
    IP20
  • Operating temperature:
    -25 to 60 °C horizontal; -25 to 50 °C vertical
  • Dimensions:
    1.25 × 5.3 × 9.8 cm
  • Tariff Code:
    8538900000
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Signal Setup Counting Protection Application
  • Combines four digital inputs and two protected digital outputs
  • Includes one configurable analog input and one configurable analog output
  • Adds two event counters and gate-time measurement for pulse-based tasks

X20CM8281 is a B&R universal mixed i/o module designed for the X20 System.

The module concentrates mixed field signals and simple pulse measurements where a compact station needs digital switching, analog acquisition, analog control, and counting together.

Before installation or replacement, verify the complete material number, digital input and output wiring, analog voltage or current terminal assignment, load and loop power, counter source and edge behavior, gate timing, X20TB12, a compatible bus module, and the saved channel configuration.

Availability, condition, price, and shipping time for X20CM8281 are confirmed during quotation.

B&R X20CM8281 Universal Mixed I/O Module Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Voltage and current analog signals use different terminal assignments
  • Software signal selection and engineering-unit scaling must match the physical wiring
  • Digital input filtering is configurable to suit pulse or contact behavior
  • Two digital inputs can operate as cyclic event counters
  • Event counting evaluates documented negative signal edges at up to 20 kilohertz
  • Input 4 supports gate-time measurement using a selectable internal counter frequency
  • Digital outputs include thermal shutdown for overcurrent and short circuit
  • Integrated protection supports switching inductive loads
  • The analog output is short-circuit proof and uses an internal enable relay for startup and errors
  • Compact machine stations requiring mixed digital and analog I/O
  • Pulse-event counting from sensors or encoders up to 20 kilohertz
  • Gate-time measurement combined with analog monitoring and control
Description
X20CM8281 is a B&R universal mixed i/o module for the X20 System automation platform.

It combines 24 VDC digital I/O with selectable voltage or current analog I/O and adds two event counters plus gate-time measurement in a single X20 slice.

Before installation or replacement, confirm the complete material number, digital input and output wiring, analog voltage or current terminal assignment, load and loop power, counter source and edge behavior, gate timing, X20TB12, a compatible bus module, and the saved channel configuration.
Alternative Names
X20CM8281 X20 CM 8281 X20-CM8281 B&R X20CM8281 BR X20CM8281 B&R X20 CM8281
Technical notes
X20CM8281 combines digital, analog, and counter functions; verify analog terminal mode, external loop power, output load, counter edge and gate settings, X20TB12, compatible bus module, and saved Automation Studio channel mapping.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
When is B&R X20CM8281 preferable to separate I/O modules?
Use it when one compact station needs a small combination of digital switching, analog measurement, analog output, and pulse counting without dedicating a separate slice to each function.
How is voltage or current selected on B&R X20CM8281?
Wire the signal to the terminals assigned to the required mode and configure the matching input or output type and scaling in Automation Studio.
Can B&R X20CM8281 power a two-wire transmitter?
No transmitter supply is specified for the analog input. Provide an appropriate external loop supply and confirm polarity, return path, and current-input terminal assignment.
What should be checked when a B&R X20CM8281 digital output reports an error?
Inspect the load current, short circuit, inductive load wiring, supply polarity, terminal connection, module temperature, and output status before clearing the fault.
How should the event counters on B&R X20CM8281 be commissioned?
Confirm which physical inputs feed the counters, the negative-edge evaluation, pulse frequency and width, input filter, rollover handling, and controller logic for the cyclic 16-bit value.
Why can the analog value on B&R X20CM8281 appear clipped?
Wrong terminal mode, excessive signal level, incorrect loop polarity, missing external power, scaling errors, or common-potential problems can drive the channel to an undershoot or overshoot value.
What should be documented before replacing B&R X20CM8281?
Save every channel mode, terminal map, digital filter, counter and gate configuration, analog scaling, output startup behavior, load details, and the validated Automation Studio project.

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