B&R Industrial Automation · System Modules For The X20 Hub System. Hub expansion module 1-port hub, 100BASE-FX Single-mode glass fiber cables Range up to 50 km Hot-swappable The POWERLINK bus controllers X20BC8083, X20BC8084 (starting with revision D0) and the standalone hub X20HB8880 are equipped with a modular hub extension. 1 or 2 additional slots are available depending on the bus base. The X20HB1882 hub expansion module can be operated in these slots. Please
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