X20HB1881 selection record: multimode-fiber hub expansion and installed-system fit
X20HB1881 belongs to the B&R X20 automation system. Specify X20HB1881 by its complete designation and documented role; the visible similarity of two modules is not a compatibility decision.
Identification matrix
| Technical item | Verified value / selection note |
|---|---|
| Complete designation | X20HB1881 |
| Hub ports | One integrated expansion port |
| Medium | Multimode fiber optic |
| System | X20 hub expansion |
The values above identify X20HB1881 at catalog level. Verify the installed revision, label and current manufacturer manual before issuing a purchase order or approving a design change.
02 / Fit boundary
When replacing or adding X20HB1881, Check fiber type, optical connector, link budget and the parent hub arrangement; a monomode device has a different order code.
Check X20HB1881 against the as-built wiring, X20 base, terminal block, supply module and controller software. Keep every accessory and revision difference visible in the RFQ; do not approve a look-alike solely from a photograph.
01 / Intended duty
For X20HB1881, Extend a documented X20 hub topology over multimode fiber where copper cable is not the specified medium.
Capture the actual cabinet location, connected equipment, expected operating range and the consequence of a lost signal or network connection. These details turn the X20HB1881 code into a specific engineering requirement.
03 / Acceptance record
For commissioning X20HB1881, Record optical link indicators and network recovery after a controlled disconnect and reconnect.
Record date, test conditions, observed LEDs or diagnostics and as-left configuration for X20HB1881. Restore normal control after testing and obtain the site's electrical or safety sign-off where required.
Code alternatives and exclusions
The references below, if any, share a relevant X20HB1881 code stem or functional family. Their ratings, ports, wiring or software may differ; they are not automatic replacements.
No additional exact-stem variant is assigned to X20HB1881 here; seek written manufacturer confirmation for any alternative.
Purchase handover
Quote X20HB1881 exactly, with quantity, required delivery, existing hardware revision and a readable label photograph. Attach the application drawing and network or channel map so the supplier can confirm the right product and accessories.
The buyer should retain a written fit decision for X20HB1881, and maintenance should keep the final settings and test evidence. Do not energize a replacement until the approved checks are complete.
