마지막 업데이트 : 10월 7일, 2026
빠른 답변: For power supply AC terminal identification, link the received full model, upright front-view L/N/earth markings and supplier-source revision to a controlled OEM drawing reference. A document mapping is not proof of completed installation.
주요 시사점
- Identify the received MDR-10-5 from its actual full-model label, not a family photograph.
- Define the view before describing physical L/N positions.
- Preserve protective earth, AC input and DC-output/signal functions separately.
- Retain source-face literal labels with their original locations and matched drawing revision.
- Record document disposition separately from installation and verification results.
An OEM drawing can identify the right power supply yet still leave an assembly team unsure which physical terminal the drawing refers to. A view from the back, an old photograph or a generic terminal symbol can reverse the apparent position of L and N. A reliable input-identification record links the received unit, the viewing direction and the controlled drawing before the connection is released for assembly.
The WEHO MDR-10-5 provides a compact example. Its actual front carries a lower protective-earth, N and L group. The upper group serves different functions: +V, −V and DC OK. The article uses these received-product markings to explain document control and assembly traceability. It does not provide a wiring design for the equipment shown, assign its load requirements or certify a completed installation.
Establish the received model before interpreting a terminal
Start with the full model on the unit rather than a carton description such as “MDR power supply.” The selected reference unit’s right label reads MDR-10-5, INPUT:100–240VAC 0.33A, 50/60Hz and OUTPUT:+5V 2.0A. Its front separately shows 5V/2.0A, 100–240VAC, 0.33A and 47/63Hz. These are literal markings on two different faces; a receiving record should retain their locations instead of combining them into a new label.
This distinction matters when purchasing, receiving and engineering use different records. The buyer may order by a supplier part number, the drawing may use an internal part number, and the technician sees the product’s actual model. Link all three identifiers in one controlled row, along with the supplier-document revision and the received lot or serial reference when available. A family name alone leaves room for a different output variant to enter the same work instruction.
The current MDR-10 source drawing gives 22.5 mm frontal width, 90 mm upright height and 100 mm front-to-rear depth. It documents TS35/7.5 or TS35/15 rail installation. These dimensions identify the mechanical envelope; they do not establish cable-bend allowance, working clearance or a customer panel’s approved layout. Keep those installation decisions in the project’s engineering record.
Describe the view used for L/N identification
An instruction that says “the left terminal” is incomplete without a view definition. For the selected unit, looking directly at the upright front with the printed text readable, the lower group runs protective earth, N and L from left to right. Looking from behind changes what left and right mean. Rotating a photograph can also obscure which edge is the top of the product.
Give the assembly drawing a view name and an orientation statement. A useful description is “front view, upright text, lower input group.” Then reference each visible marking by its function, rather than replacing the function with an approximate location. L/N identification should remain understandable when a technician opens the document on another workstation or receives a cropped printout.
The factory terminal list identifies pins 1 and 2 as the AC-input group and pin 3 as ground. Its output and signal functions are separate: pin 4 is +V, pin 5 is −V, and pin 6 is DC OK. Preserve the supplier’s group information and the visible face orientation when mapping to OEM references. Do not infer a new pin assignment from an unlabeled sketch or a photograph of another MDR model.
Link each marking to a controlled drawing reference
The practical deliverable is an evidence row that another person can follow. For the input group, record the received full model, visible marking, product view, OEM drawing number, drawing revision and the relevant terminal or wire reference. Include the evidence used to identify the physical position, such as a controlled supplier drawing and a receiving photograph of the actual face.
| Record field | What to capture | Why it helps |
|---|---|---|
| Received identity | Full model and lot or serial reference when available | Connects the instruction to the received unit |
| Product view | Upright front and lower input group | Makes left/right interpretation repeatable |
| Physical marking | L, N or protective-earth symbol | Preserves the supplier’s function identification |
| OEM reference | Drawing number, revision and terminal or wire designation | Links the observation to controlled design intent |
| Evidence | Supplier-source revision and received-face record | Allows an independent review to retrace the mapping |
| Disposition | Accepted for document mapping, held or requiring clarification | Makes unresolved differences visible |
Keep document mapping separate from proof of a completed connection. An accepted identification row says the reviewer can trace the marking to the drawing. It does not establish that a wire was installed, tightened, tested or released for service. Those activities need their own records under the OEM’s assembly and verification process.
The optical web-inspection illustration shows the selected supply mechanically positioned in a machine bay with its terminals empty. The camera, rollers and controller provide equipment context. Their presence does not establish that they use this supply’s output or that their electrical requirements have been evaluated. For a real project, the input-identification record remains tied to the controlled panel design and the actual unit.
Keep protective earth, AC input and DC functions distinct
The selected unit’s lower protective-earth symbol must not be treated as another L/N position. Its upper −V marking belongs to the DC-output group; the separate DC OK terminal is a signal function. An OEM drawing should preserve these distinctions so that an input-identification exercise does not become an assumed output or signal connection plan.
Use different reference fields for the product marking and the OEM circuit designation. For example, an internal wire identifier belongs in the project-reference field, while “N” belongs in the observed-marking field. This prevents a drawing revision from silently changing what the product itself is reported to say. If the wire identifier changes later, the source marking can remain traceable.
The engineering record below illustrates how supplier terminal functions and intended OEM connection references can be kept separate. Its blank project fields are deliberate: a source terminal list cannot supply a customer wire identifier, connector cavity or completed verification result. The AC-input group, protective-earth function and output/signal functions should remain distinct even when they appear on the same review sheet.
Manage changes without relying on a familiar photograph
When an approved supplier document changes, compare the received face and the controlled drawing again. A photograph already used for another output variant is useful only if its exact identity and relevant terminal arrangement are verified for the current unit. Similar housings do not make their labels, outputs or signal layouts interchangeable.
Purchasing can request a matched evidence set with a clear full-model reference. Receiving can preserve the actual nameplate and input-group orientation. Engineering can resolve the mapping to the current drawing revision. Assembly then receives a document whose references can be followed without guessing from an old image. Each team contributes a different part of the same traceability chain.
For an unresolved difference, record the literal observation and the two document references that disagree. Avoid rewriting the received marking to make it match the drawing. A hold should identify the missing decision: model identity, view orientation, terminal function or drawing revision. That makes the supplier or engineering clarification specific enough to close.
Carry the same view convention into service documentation
A replacement unit may be identified while installed in a narrow compartment. The service record should use the same orientation convention as the assembly drawing, even if the technician’s first photograph is oblique. Preserve a readable model reference and a view of the relevant input group before using the record to update the equipment file.
The sheet-feed scanner illustration uses a different equipment arrangement and product position. As in the optical web-inspection view, the selected supply is shown before connection. A service instruction for actual equipment still needs the OEM’s applicable isolation, connection and release procedure; the illustration does not replace those project decisions.
Request a traceable supplier package
For a quotation or documentation review, send WEHO the full requested model, the intended input-marking question and the OEM drawing reference that needs support. Request the current matching terminal drawing and product-label evidence. If the mechanical layout is also being reviewed, identify the required width, height and depth axes and the intended rail type rather than sending only a cabinet photograph.
A strong AC terminal-identification record is concise but complete: received identity, defined view, literal marking, controlled drawing reference, supporting evidence and review disposition. It gives purchasing, receiving, engineering and assembly a shared reference without presenting an unverified connection as a finished installation.
결론
A useful power supply AC terminal identification record lets another reviewer trace the received unit’s physical input markings to the same controlled OEM drawing. Preserve the full model, view orientation, source revision, marking, project reference and review disposition. Request matched evidence from WEHO when the received unit or drawing cannot support that mapping.
Sources
- WEHO MDR-10 English product page: exact 5V model row and 22.5 × 90 × 100 mm envelope.
- WEHO MDR-10 specification and terminal drawing: input group, protective earth, output/signal functions and documented rail types.
- Verified exact-model enterprise-drive originals and complete MDR-10 drawing support the literal label and physical product descriptions above. Customer connection details and electrical suitability remain project-specific.
자주 묻는 질문
What input-group order is visible on the MDR-10-5 front?
With the unit upright and the front text readable, the lower group shows protective earth, N and L from left to right. Record that view convention with the OEM drawing reference.
Should receiving records combine the two frequency markings?
No. The selected source front prints 47/63Hz and the right nameplate prints 50/60Hz. Retain the literal marking and its face rather than creating a replacement label.
What identifies the exact received power supply?
Use the full MDR-10-5 model, its actual label, the matched supplier-source revision and the lot or serial reference when available. A generic MDR family description is insufficient.
Does a terminal-identification record prove a completed connection?
It establishes a traceable mapping between observed markings and controlled OEM references. Installation, tightening, testing and service release require their own applicable project records.
What dimensions are documented for this MDR-10 source?
The complete source gives 22.5 mm frontal width, 90 mm upright height and 100 mm front-to-rear depth, with TS35/7.5 or TS35/15 rail installation. Clearances and customer layout remain separate decisions.
