Last Updated: October 7, 2026
Quick Answer: DIN-rail power supply mechanical interchange requires the ordered revision’s rail profile, three-axis envelope and service-access records. A nominal output match or similar photograph does not approve a substitute.
Two DIN-rail supplies can share a nominal output while fitting differently within a released cabinet. Mechanical interchange review should compare the actual rail interface, enclosure envelope and service arrangement of the ordered revisions. A matching front width alone is insufficient evidence for a substitute.
This OEM guide organizes controlled documentation and inspection evidence. Application images depict disconnected mechanical fit and establish no electrical compatibility or completed machine qualification.
Key Takeaways
- Identify both controlled models, revisions and actual rail profiles.
- Preserve width, height and depth separately from installation clearances.
- Check terminal and control access within the completed cabinet arrangement.
- Treat the drawing and illustrations as documentation aids; retain the required verification and authorized disposition.
Identify both controlled configurations
Record the full installed model and the proposed replacement model with their applicable mechanical and installation documents. Keep the original cabinet configuration identifiable. A family name, nominal wattage or similar front photograph does not establish mechanical equivalence.
Identify the actual rail and the mounting interface required by each supplied revision. The retained MDR-100 drawing names TS35/7.5 or TS35/15 as admissible DIN-rail profiles. Those two profile depths belong in the comparison record; an unspecified piece of rail is insufficient. Use the applicable ordered-unit instructions rather than inferring compatibility from an approximate hook shape in a rendering. This guide does not approve a particular replacement pair.
Compare the three exterior axes
Preserve width, height and front-to-rear depth with their axes. A reduced front width does not prove that the replacement fits the same service envelope. Consider how the body projects from the rail plane and where the terminals and controls are located.
Keep exterior dimensions separate from required working, ventilation and service clearances. Obtain those requirements for the actual ordered revision. This article supplies no universal clearance distance or rail-loading allowance.
Review terminal and service access
Identify the terminal groups, control locations and the stage at which they are accessed in the released cabinet. The MDR-100-24 sources show six upper front connection openings: two positive-output positions, two negative-output positions and two DC OK relay-contact positions. Three lower front openings identify protective earth, N and L. The front also contains the adjustment access and status indicator. A mechanically mounted unit can still create a service-access issue after surrounding equipment is fitted. Review the actual configuration rather than an isolated product pose.
Any changed conductor route or service operation should remain visible in the comparison. Mechanical fit does not establish terminal suitability, electrical compatibility or completed machine acceptance. Separate those reviews so that one does not silently approve the other.
Record the mounting evidence
A comparison record should identify the rail interface, actual placement, applicable drawing and any unresolved discrepancy. Photographs can document visible fit, but an image cannot prove a hidden latch operation or a specified retention result. Use the required controlled acceptance method.
The application illustrations show exact-model disconnected mechanical placement in two different equipment panels. They are not replacement-release evidence for a customer cabinet. Their documented rail profile is a contextual scale anchor, with the front-to-rear projection kept distinct from the rail plane.
Exact-model source boundary
The MDR-100-24 retained drawing gives 55 mm front width, 90 mm height and 100 mm front-to-rear depth. The exact product label and English product-page table state 24V/4A; the retained family PDF gives 24V 0–4.16A, while the source photograph’s marketing caption gives 4.2A. Preserve those records separately rather than editing the photographed label to match another document. The small source label also contains a 12V temperature line, which this guide does not apply to the 24V unit. No available load current or replacement equivalence is established here.
را official WEHO product page identifies the family. The retained exact-model photographs and controlled mechanical drawing identify this illustrative unit. Product records remain separate from the OEM assembly acceptance.
Release the change against the real cabinet
Identify the cabinet configurations and units covered by the mechanical review. Preserve the original baseline, proposed arrangement, required verification and authorized disposition. Avoid accepting a substitute solely because it can be temporarily clipped onto a piece of rail.
For a product inquiry, provide the complete model, ordered revision, rail/interface information and the controlled cabinet drawing reference. The diagram is a conceptual comparison map; it contains no retention test or completed substitution approval.
The map shows a documentation workflow; it contains no measured result. Send the full ordered model, revision and specific instruction question with a product documentation inquiry.
نتیجه گیری
A din-rail power supply mechanical interchange decision belongs to the controlled cabinet change process. Compare the actual interface, complete enclosure projection and service requirements before authorizing the proposed arrangement. Keep electrical suitability and retention verification as separate recorded checks.
Frequently Asked Questions
Does matching output voltage establish DIN-rail mechanical interchange?
Identify the actual rail and the mounting interface required by each supplied revision. Use the applicable instructions rather than inferring compatibility from an approximate hook shape in a rendering. This guide does not approve a particular replacement pair.
Which enclosure dimensions belong in an interchange review?
Keep exterior dimensions separate from required working, ventilation and service clearances. Obtain those requirements for the actual ordered revision. This article supplies no universal clearance distance or rail-loading allowance.
Why should terminal and service access be checked after a mechanical fit?
Any changed conductor route or service operation should remain visible in the comparison. Mechanical fit does not establish terminal suitability, electrical compatibility or completed machine acceptance. Separate those reviews so that one does not silently approve the other.
Can an application illustration prove the hidden DIN latch retention?
The application illustrations show exact-model disconnected mechanical placement in two different equipment panels. They are not replacement-release evidence for a customer cabinet. Their documented rail profile is a contextual scale anchor, with the front-to-rear projection kept distinct from the rail plane.
What records should accompany a proposed cabinet change?
For a product inquiry, provide the complete model, ordered revision, rail/interface information and the controlled cabinet drawing reference. The diagram is a conceptual comparison map; it contains no retention test or completed substitution approval.
