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B&R X20DOF321 – I/O module, 16 digital outputs 24 VDC for 1-wire connections

Name: B&R X20DOF321 – I/O module, 16 digital outputs 24 VDC for 1-wire connections
Brand: B&R
SKU: X20DOF321

MPN: X20DOF321 · Brand: B&R

Price on request

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12-month warranty (new) · 3-month (used/refurbished)

30-day returns, no restocking fee on unused parts

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Quick facts

Availability	Confirmed on request
Category	Digital outputs
Lifecycle	Active
Warranty	12-month (new) · 3-month (used/refurbished)
Datasheet	Manufacturer datasheet ↗

Shipping & availability

When can X20DOF321 be shipped?

X20DOF321 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up X20DOF321 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 — mention it when you request a quote for X20DOF321 and we'll include express shipping options in our reply.

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 X20DOF321, subject to availability and destination.

• 16 digital outputs

• Sink circuit

• 1-wire connections

• Integrated output protection

The module is equipped with 16 outputs for 1-wire connections. The module is designed for a sink output 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…
X20TB1F	Terminal blocks — Tool-free wiring with push-in technology; Simple wire release using a screwdriver; Ability to label each terminal; Plain text labeling also…

Specifications

Short description

I/O module

16 digital outputs 24 VDC for 1-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	0.25 W (Rev. C0: 0.29 W)
Power consumption – Internal I/O	0.4 W " data-placement="top" data-html="true" data-container="body" data-content="The power consumed externally for operating the module discharges via the GND contact of the power supply module and must therefore be taken into account in the power balance of the power supply module.">
Certifications – CE	Yes
Certifications – UKCA	Yes
Certifications – CRA (Cyber Resilience Act)	In preparation
Certifications – UL	cULus E115267; Industrial control equipment
B&R ID code	0x292A
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.">	+0.48

Digital outputs

Switching delay " data-placement="top" data-html="true" data-container="body" data-content="At loads ≤ 1 kΩ"> – 0 → 1	<300 µs
Switching delay " data-placement="top" data-html="true" data-container="body" data-content="At loads ≤ 1 kΩ"> – 1 → 0	<300 µs
Switching frequency – Resistive load " data-placement="top" data-html="true" data-container="body" data-content="At loads ≤ 1 kΩ">	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	8 A
Connection type	1-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")
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

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	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 X20TB1F 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 X20DOF321	PDF · 618 KB · 1.14 (02/20/2026) - EN
X20 System User´s Manual	PDF · 50 MB · 4.40 (03/10/2026) - EN

Certificates (4)

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)

12-month warrantyon all new stock

3-month warrantyon used & refurbished parts

30-day returnsno restocking fee on unused parts

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