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B&R X20DO4321 – 4 digital outputs; Sink connection; 3-wire connections

Name: B&R X20DO4321 – 4 digital outputs; Sink connection; 3-wire connections
Brand: B&R
SKU: X20DO4321
Price: 306.34 EUR
Availability: InStock

MPN: X20DO4321 · Brand: B&R

€306.34 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 — 1 available
Category	Digital I/O Modules
Warranty	12-month
Weight	0.04 kg
Country of origin	AT
Datasheet	Manufacturer datasheet ↗

Shipping & availability

When can X20DO4321 be shipped?

X20DO4321 is in stock and typically ships within 1 business day via UPS, DHL or FedEx, worldwide.

Can I pick up X20DO4321 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 X20DO4321.

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 X20DO4321, subject to availability and destination.

• 4 digital outputs

• Sink connection

• 3-wire connections

• 24 VDC and GND for actuator supply

• Integrated output protection

• OSP mode

This module is equipped with 4 outputs with 3-wire connections as well as 24 VDC and GND for the actuator power supply. The outputs are designed for a sink circuit.

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 outputs 24 VDC for 3-wire connections

General information

Diagnostics – Module run/error	Yes, using LED status indicator and software
Diagnostics – Outputs	Yes, using LED status indicator and software (output error status)
Power consumption – Bus	0.16 W
Power consumption – Internal I/O	0.49 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 – KC	Yes
B&R ID code	0x22B4
Status indicators	I/O function per channel, operating state, module status
Additional power dissipation caused by actuators (resistive) [W] " data-placement="top" data-html="true" data-container="body" data-content="Number of outputs x R<sub>DS(on)</sub> x Nominal output current<sup>2</sup>. For a calculation example, see section "Mechanical and electrical configuration" in the X20 system user's manual.">	+0.12

Digital outputs

Switching delay – 0 → 1	<300 µs
Switching delay – 1 → 0	<300 µs
Switching frequency – Resistive load	Max. 500 Hz
Switching frequency – Inductive load	See section "Switching inductive loads".
Variant	FET current-sinking
Nominal voltage	24 VDC
Switching voltage	24 VDC -15% / +20%
Nominal output current	0.5 A
Total nominal current	2 A
Connection type	3-wire connections
Output circuit	Sink
Output protection	Thermal shutdown in the event of overcurrent or short circuit (see value "Short-circuit peak current"); Internal freewheeling diode for switching inductive loads (see section "Switching inductive loads")
Actuator power supply	0.5 A in total for output-independent actuator power supply
Diagnostic status	Output monitoring with 10 ms delay
Leakage current when the output is switched off	75 µA
R DS(on)	120 mΩ
Peak short-circuit current	<7 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

Actuator power supply

Power consumption – Actuator power supply	Max. 12 W " data-placement="top" data-html="true" data-container="body" data-content="The power consumption of the sensors connected to the module is not permitted to exceed 12 W.">
Voltage	Module power supply minus voltage drop for short-circuit protection
Voltage drop for short-circuit protection at 500 mA	Max. 2 V
Short-circuit proof	Yes

Electrical properties

Electrical isolation

Channel isolated from bus; Channel not isolated from channel and I/O power supply

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	-
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 X20DO4321	PDF · 780 KB · 3.20 (10/01/2024) - 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 (8)

2226379 CSA Certificate of Compliance X20 X67	PDF · 205 KB · 2026_09 (09/21/2026)
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)
UK Declaration PLC X20	PDF · 151 KB · 2024-01 (01/18/2024)
X20, X67 KC certificates	PDF · 7 MB · 2.00 (08/17/2026)