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B&R X20SM1444-1

I/O module, 1 full bridge for controlling stepper motors

MPN: X20SM1444-1
Category: Motor controllers

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What is the B&R X20SM1444-1?

1 stepper motor, 24 to 48 VDC ±25%, 5 A (10 A peak)

Resolution of current values at 1%

Boost, nominal and holding current separately configurable

Sensorless, load-dependent current control

Integrated motor detection

256 microsteps per step

Stall detection

Complete integration in Automation Studio and CNC applications

R+ and R- also configurable as digital inputs

Open circuit detection with 5 V differential ABR interface

Input ramp limit at max. 12.5 A

Function model "Ramp" based on CANopen communication profile DS402

The stepper motor module is used to control stepper motors with a nominal voltage of 24 to 48 VDC (±25%) at a motor current up to 5 A (10 A peak). ABR outputs R+ and R- can also be used as digital inputs.

Due to the individual adjustment of the coil currents, the motor is only operated with the current it actually needs. This simplifies the selection of the available motors and prevents unnecessary heating. Because this affects energy consumption and thermal load, the effects are positive on the service life of the complete system. Complete flexibility is achieved through the use of independently adjustable holding, maximum and nominal current values. The current for microsteps is automatically adjusted to the configured current values.

In addition, the module contains a sensorless, load-dependent current control. Depending on the operating situation and load, the module regulates the current downwards. Energy savings up to 75% are possible in this way.

The automatic motor identification system is an enormous help during standstills. The stepper motor modules can identify the connected motors using their coil characteristics and generate feedback in the form of an analog value. This makes it possible to detect not only wiring errors, but also incorrect motor types being used mistakenly. "Stall detection" is integrated to analyze the motor load. Detection of the stall is defined via a configurable threshold. This allows an overload or motor standstill to be detected precisely in many different types of applications.

Specifications

Short description

I/O module

1 full bridge for controlling stepper motors

General information

Diagnostics – Module run/error	Yes, using LED status indicator and software
Diagnostics – Output	Yes, using LED status indicator and software
Diagnostics – I/O power supply	Yes, using software
Power consumption – Bus	0.1 W
Power consumption – Internal I/O	-
Power consumption – External I/O	At 18 VDC 0.54 W; At 24 VDC 0.6 W; At 40 VDC 0.76 W; At 60 VDC 0.97 W (note: Depends on the supplied voltage)
Certifications – CE	Yes
Certifications – UKCA	Yes
Certifications – CRA (Cyber Resilience Act)	In preparation
B&R ID code	0xF3ED
Status indicators	I/O function per channel, operating state, module status
Additional power dissipation caused by actuators (resistive) [W]	At 1 A 0.31 W; At 2 A 0.574 W; At 3 A 0.848 W; At 4 A 1.1 W; At 5 A 1.4 W (note: Depends on the strength of the motor current)
Input current limiting	Max. 12.5 A
Type of signal lines	Shielded lines must be used for all signal lines.

Motor output stage

Module power supply – Supply	External
Module power supply – Fuse	Required line fuse: Max. 10 A, slow-blow
Quantity	1
Type	2-phase bipolar stepper motor (full bridge)
Nominal voltage	24 to 48 VDC ±25% (note: The tolerance value is composed of the voltage tolerances and permissible total AC voltage component with a peak value of 5% of the rated voltage.)
Nominal current	5 A
Maximum current	10 A for 1 sLet-through energy I2T"."> (note: See section)
DC bus capacitance	300 µF
Step resolution	Max. 256 microsteps per step
Output protection	Reverse polarity protection on supply voltage

Digital inputs

Input filter – Hardware	<5 µs
Input filter – Software	-
Switching threshold – Low	<7.5 VDC
Switching threshold – High	>11.5 VDC
Quantity	2
Nominal voltage	24 VDC
Input circuit	Sink
Connection type	1-wire connections
Input resistance	Typ. 8.2 kΩ
Additional functions	Use as R+ and R- for ABR interface, ; quick stop and enable functionABR interface and digital inputs"."> (note: See section)
Open-circuit and short-circuit detection	No

ABR incremental encoder

Quantity	1
Encoder inputs	5 V, symmetrical
Counter size	16-bit
Input frequency	Max. 125 kHz
Evaluation	4x
Open-circuit detection	Yes, differential detection

Electrical properties

Electrical isolation

Channel isolated from bus and channel isolated from 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	-20 to +50°C
Temperature – Vertical mounting orientation	-20 to +40°C
Temperature – Derating	See section "Derating".
Temperature – Storage	-25 to +80°C
Temperature – Transport	-25 to +80°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 X20BM31 separately.
Pitch	25 +0.2 mm

Accessories

Required accessories (order separately)

X20BM31	Bus modules — Bus module for double-width I/O modules; The internal I/O supply is interconnected The bus module serves as a basis for all double-width X2…
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…

Downloads & documentation

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

Data sheets & manuals

CAD & dimension drawings

Certificates (4)

X20SM1444-1: frequently asked questions

When can X20SM1444-1 be shipped?

X20SM1444-1 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 X20SM1444-1 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 X20SM1444-1 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 X20SM1444-1, subject to availability and destination.