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Short description
Hub 2 Fast Ethernet interfaces for fiber optic cable for redundant wiring
General information
Status indicators Module status, bus function
Module status Yes, using status LED
Bus function Yes, using status LED
Power consumption 2.3 W (Rev. <D0: 2.8 W)
Additional power dissipation caused by actuators (resistive) [W] -
CE Yes
ATEX Zone 2, II 3G Ex nA nC IIA T5 Gc
IP20, Ta (see X20 user's manual)
FTZÚ 09 ATEX 0083X
UL cULus E115267
Industrial control equipment
HazLoc cCSAus 244665
Process control equipment
for hazardous locations
Class I, Division 2, Groups ABCD, T5
Type Active hub expansion module
Variant 2x duplex LC female
Transfer rate 100 Mbit/s
Physical layer 100BASE-FX
Half-duplex Yes
Full-duplex No
Autonegotiation No
Hub propagation delay 0.96 to 1 µs
Wave length
Typ. 1300 nm

Rx range: 1270 to 1380 nm

Tx range: 1270 to 1380 nm
Cable fiber type Multimode fiber with 62.5/125 μm or 50/125 μm core diameter
On both sides: Duplex LC male connector
Optical power budget
Glass fiber 62.5/125 µm, NA = 0.275 11 dB
Glass fiber 50/125 µm, NA = 0.200 7.7 dB
Cable length
Half-duplex Max. 400 m between 2 stations (segment length)
POWERLINK Max. 2 km between 2 stations (segment length)
Electrical properties
Electrical isolation Power supply isolated from Ethernet (IF1 and IF2)
Operating conditions
Mounting orientation
Horizontal Yes
Vertical Yes
Installation elevation above sea level
0 to 2000 m No limitations
>2000 m Reduction of ambient temperature by 0.5°C per 100 m
Degree of protection per EN 60529 IP20
Ambient conditions
Horizontal mounting orientation (with ≥2 hubs) -25 to 50°C (Rev. <D0: 0 to 40°C)
Vertical mounting orientation (with ≥2 hubs) -25 to 35°C (Rev. <D0: 0 to 35°C)
Derating -
Storage -40 to 85°C
Transport -40 to 85°C
Relative humidity
Operation Up to 100%, condensing
Storage 5 to 95%, non-condensing
Transport 5 to 95%, non-condensing
Mechanical properties
Slot Hub expansion for X20cBC8084 and X20cHB8884
Material number:
  • Active hub expansion module
  • 2x 100 BASE-FX hub for redundant wiring
  • Hot-swap-capable

The X20BC8084 POWERLINK bus controller and the X20HB8884 module are equipped with an integrated link selector function. An additional 1 or 2 slots are available, depending on the bus base used. The active X20HB2886 hub expansion module can be operated in these slots. Note that the hardware revision of the X20BC8084 and the X20HB8884 must be ≥E0.

The active hub expansion module is equipped with one integrated 2x hub and allows redundant wiring. This means that the connection between the two 100 Base-FX interfaces remains intact if there is a failure in the bus controller or Compact Link Selector. The Ethernet connection is made using 62.5/125 μm or 50/125 µm fiber optic multimode cable with a duplex LC connection. The status of the module and network are indicated by LEDs.

Further information:

Technology information: Redundancy

User's manual: Redundanz für Steuerungssysteme

Mandatory Accessories
Expandable bus controllers
X20cBC8084 X20 bus controller, coated, 1 POWERLINK interface, 1x link selector for POWERLINK cable redundancy, supports expansion with active X20 hub modules, 2x RJ45, order bus base, power supply module and terminal block separately!
System modules for expandable bus controllers
X20cBB82 X20 bus base, coated, for X20 base module (BC, HB, etc.) and X20 power supply module, with two expansion slots for two X20 add-on modules (IF, HB, etc.), X20 locking plates (left and right) X20AC0SL1/X20AC0SR1 included
X20 redundancy systems
X20cHB8884 X20 compact link selector, coated, 2x RJ45, order bus base, power supply module and terminal block separately.
Automation Studio HW Upgrades Version (Date) Download
V4.0 HW Upgrade (X20cHB2886) EXE / 843 KB
Certificates Version (Date) Download
244665 CSA HazLoc Certificate of Compliance X20, X67 PDF / 56 KB
E115267 UL CoC X20 PDF / 847 KB
FTZU 09 ATEX 0083X PDF / 697 KB
Documentation Version (Date) Download
Coated modules PDF / 60 KB
Datasheet X20(c)HB2886 PDF / 150 KB
Redundancy for control systems PDF / 8 MB
X20 System User´s Manual PDF / 56 MB
E-CAD (Electro or EPLAN Templates) Version (Date) Download
X20 EPLAN P8 from V2.4 EXE / 161 MB
M-CAD (Mechan. Templates) Version (Date) Download
3D File DXF/STEP X20 system module X20(c)HB288x ZIP / 1 MB

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