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Match the complete marking
Include the complete B&R X20HB8884 marking and any hardware revision on the item. Record the redundant paths and installed expansion modules.
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Technical specifications for X20HB8884
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Manufacturer:B&R
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Product Category:PLC Systems
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Spare Part Number:X20HB8884
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Weight:0.06 kg
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Tariff Code:8537101190
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Device type:POWERLINK compact link selector
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Network interfaces:2 shielded RJ45 ports
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Physical layer:100BASE-TX
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Transfer rate:100 Mbit/s
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Duplex mode:Half-duplex
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Autonegotiation:Supported
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Auto-MDI/MDIX:Supported
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Segment length:100 m maximum between stations
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Hub propagation delay:0.96 to 1 us
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Power consumption:2 W
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Electrical isolation:Power supply isolated from POWERLINK IF1 and IF2
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Protection rating:IP20
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Operating temperature:-25 to 60 C horizontal; -25 to 50 C vertical
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Required power module:X20PS8002
Information
Overview
Downloads
Applications / Compatibility
Product Precautions
- B&R X20HB8884 maintains a POWERLINK connection through redundant network paths and selects the available line with the better transmission quality.
Network paths: Two shielded RJ45 interfaces
Transmission: 100 Mbit/s, half-duplex
Segment limit: 100 m between stations
Transmission: 100 Mbit/s, half-duplex
Segment limit: 100 m between stations
The two shielded RJ45 interfaces operate at 100 Mbit/s over 100BASE-TX in half-duplex mode. Autonegotiation and Auto-MDI/MDIX support the physical connection, while the redundant topology remains a POWERLINK system design task.
The selector requires an X20PS8002 supply module, a terminal block and a suitable bus base. The expansion arrangement uses one X20HB2880 or two X20HB2885 modules; these parts must be considered when checking an existing installation.
The S/E indicator distinguishes both networks active, one surviving network and failure of both networks. The number switches have no operating function and are reserved for product testing, so they should not be used to diagnose or assign a POWERLINK node address.
The selector requires an X20PS8002 supply module, a terminal block and a suitable bus base. The expansion arrangement uses one X20HB2880 or two X20HB2885 modules; these parts must be considered when checking an existing installation.
The S/E indicator distinguishes both networks active, one surviving network and failure of both networks. The number switches have no operating function and are reserved for product testing, so they should not be used to diagnose or assign a POWERLINK node address.
Controller platform reference: B&R redundant POWERLINK. Maintain both network paths and the prescribed X20 assembly.
The original technical excerpt applicable to B&R X20HB8884 covers interface ratings, assembly requirements, indicators and pinout. The separate installation guide covers redundant cabling, assembly hardware, link indicators and path-failure tests.
X20HB8884 Official Technical Excerpt
The original technical excerpt applicable to B&R X20HB8884 covers interface ratings, assembly requirements, indicators and pinout. PDF · 4 pages.X20HB8884 Installation & Verification Guide
Apter Power installation and verification guide covering redundant cabling, assembly hardware, link indicators and path-failure tests. PDF · 5 pages.
Original manufacturer pages retain their technical context. Use the Apter Power guide with the applicable manufacturer instructions and approved installation design.
System and supply context: The selector connects a POWERLINK device to redundant network cabling through the required X20 expansion hardware.
Application scope: Use the selector where alternate physical paths are part of the approved network design; it is not a general full-duplex Ethernet switch.
Application scope: Use the selector where alternate physical paths are part of the approved network design; it is not a general full-duplex Ethernet switch.
Redundant machine network
Two cable paths support communication when one path is unavailable.Link diagnostics
S/E and L/A indicators separate network activity from redundant-path failure.Cabinet network transition
Shielded RJ45 connections bring redundant paths to the X20 assembly.Planned path testing
Independent interruption of each route verifies the installed redundancy.
Prepare B&R X20HB8884 for its configured installation using these checks.
Network type
Use the device within the POWERLINK topology.
Segment length
Keep each station-to-station link within 100 m.
Assembly hardware
Retain the required power, base and expansion modules.
Status switches
Do not treat the number switches as an operating address setting.
Environment
Apply the uncoated module humidity limits.
Redundancy test
Test both paths independently and confirm recovery.
Alternative Names
B&R X20HB8884
Technical notes
Signal and interface: The nominal hub propagation delay is 0.96–1 µs. Account for the complete redundant topology when assessing network timing.
Installation boundary: The power supply is isolated from the two POWERLINK interfaces. Plain X20HB8884 operation requires noncondensing humidity.
Technical basis: B&R X20(c)HB8884 Data sheet V2.31. Use the X20HB8884 column; the separate coated X20cHB8884 environmental ratings do not apply.
FAQ View All FAQ
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What network function does B&R X20HB8884 provide?It is a compact link selector that connects a POWERLINK device to a redundant POWERLINK cable system.
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How many network ports are on B&R X20HB8884?The module provides two shielded RJ45 interfaces for the redundant 100BASE-TX paths.
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Does B&R X20HB8884 use full-duplex Ethernet?No. It uses half-duplex operation, with autonegotiation and Auto-MDI/MDIX supported.
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What cable length limit applies to B&R X20HB8884?Each 100BASE-TX segment between two stations is limited to 100 m.
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Which hardware is mandatory around B&R X20HB8884?Use X20PS8002 power supply, X20TB12 terminal block, X20BB81 or X20BB82 bus module, and either one X20HB2880 or two X20HB2885 expansion modules.
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How does B&R X20HB8884 choose a redundant path?The integrated link-selector function transfers data over the highest-quality available network line.
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What delay does B&R X20HB8884 introduce?The hub propagation delay is 0.96 to 1 microsecond.
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How should B&R X20HB8884 redundancy be accepted?Prove normal traffic first, then interrupt each path independently and verify communication continuity, recovery and the expected status indications.
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