RUMC21BD: verified equipment identity and purchase checkpoints
RUMC21BD is a specific Schneider Electric Harmony universal plug-in relay reference. The category collage used as its main picture is a shared reference image, not an exact photo of RUMC21BD. The facts below are tied to the stated code; the actual installation still needs a fit review.
Technical specification
| Technical item | Verified value / selection note |
|---|---|
| Exact designation | RUMC21BD |
| Manufacturer product identity | Harmony universal plug-in relay |
| Contacts | 2 changeover |
| Contact rating | 10 A class |
| Coil | 24 V DC |
Purchase and installation matrix
| Technical item | Verified value / selection note |
|---|---|
| Existing installation | Record the installed RUMC21BD code, equipment tag and panel or machine drawing. |
| Electrical or signal match | Compare RUMC21BD voltage, current, signal or safety duty to the application. |
| Mechanical and accessory fit | Check RUMC21BD terminals, mounting, operators, bases and available space. |
| Acceptance evidence | Retain the delivered RUMC21BD label, settings and functional test record. |
The buying decision
Use RUMC21BD only after resolving the essential field condition: Check socket pinout, test-button policy and coil suppression. Capture any departure from the installed RUMC21BD arrangement as an engineered change.
Questions for the supplier
Quote the complete RUMC21BD designation, quantity, destination and expected documentation. Ask whether RUMC21BD needs a separate terminal block, protective accessory, operator, network adaptor or configuration license for the proposed installation.
Ask about the current regional lifecycle of RUMC21BD. If an alternative is offered, compare its function, ratings, mounting and wiring against RUMC21BD; do not equate an official replacement recommendation with automatic drop-in interchangeability.
Commissioning and traceability
Qualified personnel should isolate the circuit before handling RUMC21BD, mark as-found wiring, preserve settings where relevant and test the finished installation against the approved design. File the delivered RUMC21BD code, program or parameter changes and acceptance measurements together.
Visually similar codes
The 1 unassigned codes below resemble RUMC21BD by the visible RUMC pattern. They are indexed on this representative page and will not receive separate pages in this batch. They are not asserted to be interchangeable with RUMC21BD; check each complete code.
Release note
Release the order only when RUMC21BD identity, application fit, accessories and availability have been checked. Keep the RUMC21BD technical and acceptance record accessible for future maintenance; a picture or abbreviated code is not sufficient evidence.
