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B&R

B&R X20CM8281 Mixed I/O Module

Name: B&R X20CM8281 Mixed I/O Module
Brand: B&R
SKU: X20CM8281
Price: 344.21 USD
Availability: InStock

SKU: X20CM8281

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$344.21

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X20CM8281 Mixed I/O Module | B&R

The B&R X20CM8281 is a mixed i/o module. 4 digital inputs, 2 digital outputs, 1 analog input, 1 analog output, special functions. The listed technical data is based on the manufacturer's data sheet. It is supplied by SHLY-PLC, an independent industrial-automation distributor: every unit is visually inspected and functionally checked before dispatch, held in ready stock and shipped worldwide for maintenance, spares and retrofit use. Share your application or existing part number and our team will confirm fitment and comparable in-stock alternatives.

Features

Degree of protection per EN 60529: IP20.
Connection type: 1-wire connections.
Analog inputs: Yes, using LED status indicator and software.
Digital outputs: Yes, using LED status indicator and software (output error status).
Input voltage: 24 VDC -15% / +20%.
RINA Type Approval Certificate - X20 / Power Panel T30: 1.00 (05/07/2021).

Specifications

Technical parameters compiled from the manufacturer data sheet and reference documentation.

Technical Specifications
General
I/O module	4 digital inputs, 2 digital outputs, 1 analog input, 1 analog output, special functions
Diagnostics
Module run/error	Yes, using LED status indicator and software
Analog inputs	Yes, using LED status indicator and software
Digital outputs	Yes, using LED status indicator and software (output error status)
Power consumption
Bus	0.01 W
Internal I/O	1.75 W
Certifications
CE	Yes
UKCA	Yes
CRA (Cyber Resilience Act)	In preparation
ATEX	Zone 2, II 3G Ex nA nC IIA T5 Gc IP20, Ta (see X20 user's manual) FTZÚ 09 ATEX 0083X
UL	cULus E115267 Industrial control equipment
HazLoc	cCSAus 244665 Process control equipment for hazardous locations Class I, Division 2, Groups ABCD, T5
DNV	Temperature: B (0 to 55°C) Humidity: B (up to 100%) Vibration: B (4 g) EMC: B (bridge and open deck)
CCS	Yes
LR	ENV1
KR	Yes
ABS	Yes
BV	EC33B Temperature: 5 - 55°C Vibration: 4 g EMC: Bridge and open deck
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]	-
Input filter
Hardware	≤2 µs
Software	Default 1 ms, configurable between 0 and 25 ms in 0.2 ms increments
Switching threshold
Low	<5 VDC
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 V eff
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
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
Evaluation	Positive edge - Negative edge
Length of pause between pulses	≥100 µs
Pulse length	≥20 µs
Supported inputs	Input 4
Digital converter resolution
Voltage	±12-bit
Current	12-bit
Output format
Voltage	INT 0x8001 - 0x7FFF / 1 LSB = 0x0008 = 2.441 mV
Current	INT 0x0000 - 0x7FFF / 1 LSB = 0x0008 = 4.883 µA
Voltage	INT 0x8001 - 0x7FFF / 1 LSB = 0x0010 = 4.882 mV
Current	INT 0x0000 - 0x7FFF / 1 LSB = 0x0010 = 9.766 µA
Input impedance in signal range
Voltage	>1 MΩ
Current	-
Load
Voltage	-
Current	<300 Ω
Permissible input signal
Voltage	Max. ±15 V
Current	Max. ±50 mA
Undershoot
Voltage	0x8001
Current	0x0000
Overshoot
Voltage	0x7FFF
Current	0x7FFF
Voltage
Gain	0.08%
Offset	0.02%
Gain	0.04%
Offset	0.0225%
Current
Gain	0 to 20 mA = 0.08% / 4 to 20 mA = 0.1%
Offset	0 to 20 mA = 0.03% / 4 to 20 mA = 0.16%
Gain	0.05%
Offset	0.125%
Max. gain drift
Voltage	0.01%/°C
Current	0 to 20 mA = 0.009 %/°C 4 to 20 mA = 0.0113 %/°C
Voltage	0.012%/°C
Current	0.014 %/°C
Max. offset drift
Voltage	0.002%/°C
Current	0 to 20 mA = 0.004 %/°C 4 to 20 mA = 0.005 %/°C
Voltage	0.0075% / °C
Current	0.03 %/°C
Nonlinearity
Voltage	<0.02%
Current	<0.02%
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
Switching delay
0 → 1	<250 µs
1 → 0	<270 µs
Switching frequency
Resistive load	Max. 100 Hz
Inductive load	See section "Switching inductive loads".
Execution	Current-sourcing FET
Switching voltage	24 VDC -15% / +20%
Nominal output current	0.5 A
Total nominal current	1 A
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
R DS(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
Load per channel
Voltage	Max. ±10 mA, load ≥ 1 kΩ
Current	Max. load is 400 Ω
Error caused by load change
Voltage	Max. 0.02%, from 10 MΩ → 1 kΩ, resistive
Current	Max. 0.5%, from 1 Ω → 400 Ω, resistive
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%
Electrical isolation	Channel isolated from bus Channel not isolated from channel
Mounting orientation
Horizontal	Yes
Vertical	Yes
Installation elevation above sea level
0 to 2000 m	No limitation
>2000 m	Reduction of ambient temperature by 0.5°C per 100 m
Degree of protection per EN 60529	IP20
Operation
Horizontal mounting orientation	-25 to 60°C
Vertical mounting orientation	-25 to 50°C
Derating	See section "Derating".
Storage	-40 to 85°C
Transport	-40 to 85°C
Relative humidity
Operation	5 to 95%, non-condensing
Storage	5 to 95%, non-condensing
Transport	5 to 95%, non-condensing
Note	Order 1x terminal block X20TB12 separately. Order 1x bus module X20BM11 separately.
Pitch	12.5 +0.2 mm
X20BM15	X20 bus module, with node number switch, 24 VDC keyed, internal I/O power supply connected through
X20BM11	X20 bus module, 24 VDC keyed, internal I/O power supply connected through
X20TB12	X20 terminal block, 12-pin, 24 VDC keyed
Automation Studio HW Upgrades	Version (Date)
V2.6 HW Upgrade (X20CM8281)	1.2.0.0 (09/04/2019) 1.1.0.0 (08/29/2019) 1.0.4.0 (12/11/2015)
V3.0 HW Upgrade (X20CM8281)	1.2.0.0 (09/04/2019) 1.1.0.0 (08/29/2019) 1.0.4.0 (12/11/2015)
V4.0 HW Upgrade (X20CM8281)	1.5.0.0 (10/03/2023) 1.4.0.0 (07/23/2021) 1.3.0.0 (10/25/2019) 1.2.0.0 (09/04/2019) 1.1.0.0 (08/29/2019) 1.0.4.0 (12/11/2015)
Certificates	Version (Date)
2226379 CSA Certificate of Compliance X20 X67	2026_09 (09/21/2026)
64331_A1 BV Certificate of Compliance X20	2026_05 (05/05/2026) 1.00 (11/08/2022) - DE
ABS Certificate of Product Design Assessment - X20 IO Series	2.00 (01/13/2025)
CCS Type Approval Certificate - X20	1.00 (06/28/2024)
Compass Safe Distance Certificate - X20	1.21 (08/23/2021)
E115267 UL Certificate of Compliance X20	2026_08_27 (08/27/2026)
EU Data Act - X20 IO - Connected Product Information Notice	1.00 (09/30/2025)
EU Declaration ATEX X20	2023-07 (09/05/2023)
EU Declaration of conformity PLC X20	2021/10 (11/08/2021)
FTZU 09 ATEX 0083X	3.00 (10/12/2021)
KR Type Approval Certificate MIL39390-AC003 (X20 System)	2.0 (05/05/2025) 1.0 (07/10/2019)
Lloyds Register (X20 only)	1.30 (07/07/2025) 1.20 (07/20/2022)
RINA Type Approval Certificate - X20 / Power Panel T30	1.00 (05/07/2021)
TAA00000BJ DNV Type Approval Certificate X20	13.0 (05/04/2026) 12.0 (02/18/2026) 11.0 (02/27/2024)
UK Declaration PLC X20	2024-01 (01/18/2024)
X20, X67 KC certificates	2.00 (08/17/2026)
Documentation	Version (Date)
Data sheet X20CM8281	3.21 (08/28/2025) - DE 3.21 (08/28/2025) - EN
X20 Package leaflet ATEX/CSA	1.4 (09/17/2024)
X20 System User´s Manual	4.40 (03/10/2026) - DE 4.40 (03/12/2026) - IT 4.40 (03/12/2026) - FR 4.40 (03/10/2026) - EN
E-CAD (Electro or EPLAN Templates)	Version (Date)
X20 EPLAN P8 from V2.4	4.0.5 (08/31/2023) 4.0.4 (10/27/2022)
M-CAD (Mechan. Templates)	Version (Date)
3D File DXF/STEP X20 Electronic module	1.0 (10/17/2005)
3D File STEP X20 I/O-Slice	1.1 (03/13/2019)
Dimensions PDF X20 Electronic module	1.0 (10/17/2005)

Compatibility & Cross-References

Model variants, options and firmware revisions can affect fitment. Before ordering the B&R X20CM8281 mixed i/o module, share your existing part number or project requirements and our team will cross-reference comparable in-stock B&R units and verify compatibility. This listing is provided by an independent industrial-automation distributor; brand names and part numbers are used for identification only.

Applications

Automation control and signal handling in industrial machinery.
Integration into new and existing control architectures.
Maintenance, spares and retrofit of installed equipment.
Machine and line-level use across manufacturing and process industries.

Warranty

Availability: X20CM8281 is stocked for prompt shipment; contact us for current quantity and lead time.
Inspection & testing: each unit is visually inspected and functionally checked before packing.
Delivery: orders are processed within 2-4 business days after payment confirmation; standard worldwide delivery is about 5-8 business days, express shipping is available, and orders over $500 ship free.

Warranty: 12-month seller warranty provided by SHLY-PLC. See our Return Policy for coverage and claims.

Independent supplier: B&R part X20CM8281 is supplied by SHLY-PLC, an independent industrial-automation distributor. Brand names and part numbers are used for product identification and remain the property of their respective owners; this listing is not affiliated with, sponsored or endorsed by the manufacturer.

Frequently Asked Questions

Q: What condition is the X20CM8281 supplied in?

A: Each unit is inspected and functionally checked before sale. Contact us for the current stock condition and quantity.

Q: How quickly can the X20CM8281 ship?

A: Orders are processed within 2-4 business days after payment confirmation. Standard worldwide delivery is about 5-8 business days, express shipping is available and orders over $500 ship free.

Q: Can you confirm compatibility or a replacement for the X20CM8281?

A: Yes. Share your existing part number or application and our technical team will verify compatibility and provide cross-references to comparable in-stock models.

X20CM8281 · Technical reference data · Independently supplied by SHLY-PLC

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