X20DI8371: X20 high-density discrete input module in the installed X20 station
X20DI8371 is a B&R X20 component in the ABB automation portfolio. The page below is a fault-isolation and replacement guide for this exact designation.
Technical identification
| Technical item | Verified value / selection note |
|---|---|
| Complete designation | X20DI8371 |
| Inputs | 8 |
| Signal | 24 V DC sink |
| Wiring | 1-wire |
| Filter | Software configurable |
| Accessories | X20BM11 and X20TB12 |
Published values help identify X20DI8371. Confirm the specific installed revision, approvals and environmental limits before engineering sign-off.
Fault isolation and proving
When recommissioning X20DI8371, A wrong common or filter can make several inputs fail together. Test all eight point states and diagnose missing supply separately.
Record the as-left status of X20DI8371: channel values, alarms, supply state and any changed settings. Work under the plant's electrical and machine safety rules.
Installed duty
For X20DI8371, Eight sensor signals share the module. Identify safety-related signals separately and do not infer a safety rating from a standard input card.
Document the real load or signal connected to X20DI8371, its normal range and the response required when that signal is lost. This makes the product decision specific to the station rather than the family name.
Fit check
Before buying X20DI8371, Check field source polarity, terminal numbering and input filter settings against the original I/O map.
Keep the complete X20DI8371 designation on the RFQ together with hardware revision, X20 base, terminal block, controller project and a photograph of the installed unit.
Related order-code references
These designations are associated with X20DI8371 by their product-line code; differences in channel count, electrical mode, firmware or safety approval must be checked. They are not automatic replacements.
No additional same-code reference is shown for X20DI8371. Other X20 parts require separate selection.
Closeout
The purchase order and maintenance report should both identify X20DI8371 without abbreviating the code. Ask the supplier to confirm accessories and any approved successor in writing.
Release X20DI8371 only after the intended field signal or power path has been demonstrated and the controller team accepts the test result.
