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B&R X20CM8281 – Digital and analog channels

Name: B&R X20CM8281 – Digital and analog channels
Brand: B&R
SKU: X20CM8281
Price: 291.50 EUR
Availability: InStock

MPN: X20CM8281 · Brand: B&R

€291.50 excl. VAT & shipping

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12-month warranty

30-day returns, no restocking fee on unused parts

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Quick facts

Availability	In stock — 2 available
Category	Communication Modules
Warranty	12-month
Weight	0.04 kg
Country of origin	AT
Datasheet	Manufacturer datasheet ↗

Shipping & availability

When can X20CM8281 be shipped?

X20CM8281 is in stock and typically ships within 1 business day via UPS, DHL or FedEx, worldwide.

Can I pick up X20CM8281 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — alongside standard UPS, DHL and FedEx shipping, express (next-day) delivery is available at checkout for in-stock items like X20CM8281.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for X20CM8281, subject to availability and destination.

• 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.

Accessories

Required accessories (order separately)

X20BM15	Bus modules — The bus module is the base for all X20 24 VDC I/O modules; The internal I/O supply is interconnected; Manual node number assignment; Indepe…
X20BM11	Bus modules — Bus module for 24 VDC I/O modules; The internal I/O power supply is connected through. The bus module is the base for all 24 VDC I/O module…
X20TB12	Terminal blocks — Tool-free wiring with push-in technology; Simple wire release using lever; Ability to label each terminal; Plain text labeling also possibl…

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 V eff

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 – Voltage	0x8001
Output of digital value during overload – Current	0x0000
Output of digital value during overload – Voltage	0x7FFF
Output of digital value during overload – Current	0x7FFF
Max. error – Gain	0.08% " data-placement="top" data-html="true" data-container="body" data-content="Based on the current measured value.">
Max. error – Offset	0.02% " data-placement="top" data-html="true" data-container="body" data-content="Based on the 20 V measurement range.">
Max. error – Gain	0 to 20 mA = 0.08% / 4 to 20 mA = 0.1% " data-placement="top" data-html="true" data-container="body" data-content="Based on the current measured value.">
Max. error – Offset	0 to 20 mA = 0.03% / 4 to 20 mA = 0.16% " data-placement="top" data-html="true" data-container="body" data-content="Based on the 20 mA measurement range.">
Max. gain drift – Voltage	0.01%/°C " data-placement="top" data-html="true" data-container="body" data-content="Based on the current measured value.">
Max. gain drift – Current	0 to 20 mA = 0.009 %/°C ; 4 to 20 mA = 0.0113 %/°C " data-placement="top" data-html="true" data-container="body" data-content="Based on the current measured value.">
Max. offset drift – Voltage	0.002%/°C " data-placement="top" data-html="true" data-container="body" data-content="Based on the 20 V measurement range.">
Max. offset drift – Current	0 to 20 mA = 0.004 %/°C ; 4 to 20 mA = 0.005 %/°C " data-placement="top" data-html="true" data-container="body" data-content="Based on the 20 mA measurement range.">
Nonlinearity – Voltage	<0.02% " data-placement="top" data-html="true" data-container="body" data-content="Based on the 20 V measurement range.">
Nonlinearity – Current	<0.02% " data-placement="top" data-html="true" data-container="body" data-content="Based on the 20 mA measurement range.">
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 V eff

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
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
Insulation voltage between channel and bus	500 V eff

Analog outputs

Max. error – Gain	0.04% " data-placement="top" data-html="true" data-container="body" data-content="Based on the current output value.">
Max. error – Offset	0.0225% " data-placement="top" data-html="true" data-container="body" data-content="Based on the entire output range.">
Max. error – Gain	0.05% " data-placement="top" data-html="true" data-container="body" data-content="Based on the current output value.">
Max. error – Offset	0.125% " data-placement="top" data-html="true" data-container="body" data-content="Based on the entire output range.">
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 " data-placement="top" data-html="true" data-container="body" data-content="Based on the current output value.">
Max. gain drift – Current	0.014 %/°C " data-placement="top" data-html="true" data-container="body" data-content="Based on the current output value.">
Max. offset drift – Voltage	0.0075% / °C " data-placement="top" data-html="true" data-container="body" data-content="Based on the entire output range.">
Max. offset drift – Current	0.03 %/°C " data-placement="top" data-html="true" data-container="body" data-content="Based on the entire output range.">
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% " data-placement="top" data-html="true" data-container="body" data-content="Based on the output range.">
Insulation voltage between channel and bus	500 V eff

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 – Horizontal mounting orientation	-25 to 60°C
Temperature – 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

Downloads & documentation

Official documents from B&R, downloaded directly from the manufacturer.

Data sheets & manuals

Data sheet X20CM8281	PDF · 1 MB · 3.21 (08/28/2025) - EN
X20 Package leaflet ATEX/CSA	PDF · 2 MB · 1.4 (09/17/2024)
X20 System User´s Manual	PDF · 50 MB · 4.40 (03/10/2026) - EN

CAD & dimension drawings

3D File DXF/STEP X20 Electronic module	ZIP · 10 KB · 1.0 (10/17/2005)
3D File STEP X20 I/O-Slice	ZIP · 872 KB · 1.1 (03/13/2019)
Dimensions PDF X20 Electronic module	PDF · 3 KB · 1.0 (10/17/2005)

Certificates (16)

2226379 CSA Certificate of Compliance X20 X67	PDF · 205 KB · 2026_09 (09/21/2026)
64331_A1 BV Certificate of Compliance X20	PDF · 1 MB · 2026_05 (05/05/2026)
ABS Certificate of Product Design Assessment - X20 IO Series	PDF · 454 KB · 2.00 (01/13/2025)
CCS Type Approval Certificate - X20	PDF · 285 KB · 1.00 (06/28/2024)
Compass Safe Distance Certificate - X20	PDF · 1 MB · 1.21 (08/23/2021)
E115267 UL Certificate of Compliance X20	PDF · 3 MB · 2026_08_27 (08/27/2026)
EU Data Act - X20 IO - Connected Product Information Notice	PDF · 92 KB · 1.00 (09/30/2025)
EU Declaration ATEX X20	PDF · 218 KB · 2023-07 (09/05/2023)
EU Declaration of conformity PLC X20	PDF · 169 KB · 2021/10 (11/08/2021)
FTZU 09 ATEX 0083X	PDF · 771 KB · 3.00 (10/12/2021)
KR Type Approval Certificate MIL39390-AC003 (X20 System)	PDF · 320 KB · 2.0 (05/05/2025)
Lloyds Register (X20 only)	PDF · 884 KB · 1.30 (07/07/2025)
RINA Type Approval Certificate - X20 / Power Panel T30	PDF · 1 MB · 1.00 (05/07/2021)
TAA00000BJ DNV Type Approval Certificate X20	PDF · 186 KB · 13.0 (05/04/2026)
UK Declaration PLC X20	PDF · 151 KB · 2024-01 (01/18/2024)
X20, X67 KC certificates	PDF · 7 MB · 2.00 (08/17/2026)