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Short description
I/O module 1 full bridge for controlling stepper motors
General information
B&R ID code 0xF3ED
Status indicators I/O function per channel, operating state, module status
Diagnostics
Module run/error Yes, using LED status indicator and software
Output Yes, using LED status indicator and software
I/O power supply Yes, using software
Power consumption
Bus 0.1 W
Internal I/O -
External I/O At 18 VDC 540 mW
At 24 VDC 600 mW
At 40 VDC 760 mW
At 60 VDC 970 mW
Additional power dissipation caused by actuators (resistive) [W] At 1 A 310 mW
At 2 A 574 mW
At 3 A 848 mW
At 4 A 1100 mW
At 5 A 1400 mW
Input current limiting Max. 12.5 A
Type of signal lines Shielded cables must be used for all signal lines.
Certifications
CE Yes
EAC Yes
Motor bridge - Power unit
Quantity 1
Type 2-phase bipolar stepper motor (full bridge)
Nominal voltage 24 to 48 VDC ±25%
Nominal current 5 A
Maximum current 10 A for 1 s
DC bus capacitance 300 µF
Step resolution Max. 256 microsteps per step
Module power supply
Supply External
Fuse Required line fuse: Max. 10 A, slow-blow
Output protection Reverse polarity protection on supply voltage
Digital inputs
Quantity 2
Nominal voltage 24 VDC
Input circuit Sink
Input filter
Hardware <5 µs
Software -
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 function
Open-circuit and short-circuit detection No
Switching threshold
Low <7.5 VDC
High >11.5 VDC
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
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
Ambient conditions
Temperature
Operation
Horizontal mounting orientation -20 to +50°C
Vertical mounting orientation -20 to +40°C
Derating See section "Derating".
Storage -25 to +80°C
Transport -25 to +80°C
Relative humidity
Operation 5 to 95%, non-condensing
Storage 5 to 95%, non-condensing
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
Material number:
X20SM1444-1
Description:
  • 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. A stall detection mechanism 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.

Mandatory Accessories
Bus modules
X20BM31 X20 bus module for double-width modules, 24 VDC keyed, internal I/O supply continuous
Terminal blocks
X20TB12 X20 terminal block, 12-pin, 24 VDC keyed
Automation Studio HW Upgrades Version (Date) Download
V4.0 HW Upgrade (X20SM1444-1) EXE / 2 MB
Documentation Version (Date) Download
Data sheet X20SM1444-1 PDF / 1 MB
X20 System User´s Manual PDF / 56 MB

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