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X20DO4321

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B&R X20DO4321 is a four-channel 24 VDC sink digital output module with 3-wire connections, actuator supply terminals, integrated protection, and OSP mode for the X20 System.
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Ships by Wednesday, October 28
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Technical specifications for X20DO4321

  • Manufacturer:
    B&R
  • Part Number:
    X20DO4321
  • Product Family:
    B&R X20 System
  • Product Type:
    Digital Output Module
  • Stock:
    1
  • Digital outputs:
    4
  • Output variant:
    FET current-sinking
  • Nominal voltage:
    24 VDC
  • Switching voltage:
    24 VDC -15%/+20%
  • Nominal output current:
    0.5 A per channel
  • Total nominal current:
    2 A
  • Output circuit:
    Sink
  • Connection type:
    3-wire connections
  • Actuator power supply:
    0.5 A total for output-independent actuator supply
  • Switching delay:
    <300 µs on; <300 µs off
  • Output protection:
    Thermal shutdown and internal freewheeling diode
  • Diagnostic status:
    Output monitoring with 10 ms delay
  • Off-state leakage current:
    75 µA
  • Peak short-circuit current:
    <7 A
  • Required terminal block:
    X20TB12, ordered separately
  • Compatible bus modules:
    X20BM11 or X20BM15, ordered separately
  • Degree of protection:
    IP20
  • Operating temperature:
    -25 to 60 °C horizontal; -25 to 50 °C vertical
  • Dimensions:
    1.25 × 5.3 × 9.8 cm
  • Tariff Code:
    8538900000
  • Country of origin:
    Germany
  • Place of shipment:
    ​Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Protection Diagnostics Integration Application
  • Provides four protected 24 VDC current-sinking outputs for 3-wire actuators
  • Includes output-independent 24 VDC and GND actuator-supply connections
  • Supports OSP behavior and software-visible output fault monitoring

X20DO4321 is a B&R digital output module designed for X20 System I/O stations.

The module connects four 3-wire actuators to an X20 station while providing output-independent actuator supply terminals and software-visible fault status.

Before installation or replacement, verify the complete material number, sink-output polarity, actuator supply loading, OSP configuration, terminal and bus modules, I/O power grouping, wiring, and environmental limits.

Availability, condition, price, and shipping time for X20DO4321 are confirmed during quotation.

B&R X20DO4321 Digital Output Module Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Thermal shutdown protects the outputs during overcurrent or short-circuit conditions
  • An internal freewheeling diode supports documented inductive-load switching
  • The actuator-supply connection is short-circuit proof
  • Output monitoring reports fault status with a documented 10 millisecond delay
  • Channel indicators and software report the output operating state
  • Restart after overload shutdown depends on module temperature
  • X20TB12 is the required 12-pin 24 VDC-keyed terminal block
  • X20BM11 or X20BM15 provides the compatible X20 bus connection
  • The output group is isolated from the bus but not from the I/O supply or other channels
  • Switching four 24 VDC actuators that require current-sinking outputs
  • Distributed 3-wire actuator stations in standard fieldbus control systems
  • Machine-control output groups using configured OSP behavior
Description
X20DO4321 is a B&R digital output module for the X20 System distributed I/O platform.

It provides four current-sinking FET outputs, 24 VDC and GND actuator-supply terminals, integrated output protection, output monitoring, and OSP mode.

Before installation or replacement, confirm the complete material number, sink-output polarity, actuator supply loading, OSP configuration, terminal and bus modules, I/O power grouping, wiring, and environmental limits.
Alternative Names
X20DO4321 X20 DO 4321 X20-DO4321 B&R X20DO4321 BR X20DO4321 B&R X20 DO 4321 X20 System X20DO4321
Technical notes
X20DO4321 is the sink-output member of the four-channel 3-wire pair; verify load polarity, the 0.5 A shared actuator-supply allowance, OSP settings, X20TB12, X20BM11 or X20BM15, and saved I/O mapping before replacement.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How do I choose between B&R X20DO4321 and X20DO4322?
Choose X20DO4321 for sinking field circuits and X20DO4322 for sourcing field circuits. They are not polarity-equivalent replacements.
Can B&R X20DO4321 power sensors or actuators from its auxiliary terminals?
The actuator-supply terminals are available, but their combined load must stay within the documented current, power, and protection limits.
Which accessories are required for B&R X20DO4321?
Use an X20TB12 terminal block and a compatible X20BM11 or X20BM15 bus module, ordered separately.
What should be checked after an output fault on B&R X20DO4321?
Inspect the load and wiring for overload or short circuit, verify the I/O supply and polarity, review software status, and allow for temperature-dependent restart.
Does B&R X20DO4321 require external suppression for inductive loads?
The module includes an internal freewheeling diode, but the actuator's stored energy, switching rate, cable length, and manufacturer instructions must still be checked.
How should OSP mode be handled when replacing B&R X20DO4321?
Record and restore the validated OSP and channel configuration in Automation Studio before returning the machine to service.
What should be confirmed before ordering B&R X20DO4321?
Confirm the sink-output requirement, 3-wire arrangement, per-channel and group current, actuator-supply demand, accessories, environmental limits, and project configuration.