Printing equipment may contain motor drives, heaters, curing units and several low-voltage branches. Adding their wattages together does not identify which circuit a compact supply should serve. Begin with the approved electrical drawing and device instructions, then choose the exact voltage variant and mechanical arrangement. A product photograph alone cannot establish the load requirements of a particular press.
Identify the control branch before selecting its supply
Record the nominal voltage, permitted device-input range and polarity for every load assigned to the branch. A controller input, an interface module and an actuator may have different requirements even when they occupy the same cabinet. Do not infer voltage from equipment size or assume every printing device accepts 24 V.
List steady current, startup events and simultaneous operating states. Leave press motors, drying, heating and print-head power on their documented power paths rather than quietly adding them to this small auxiliary example. If the actual branch needs another voltage or more current, select a separately qualified model instead of stretching this candidate’s identity.
| Decision | Evidence needed | Why it matters |
|---|---|---|
| Voltage assignment | Actual device instructions and electrical drawing | A familiar enclosure does not establish a compatible voltage. |
| Operating demand | Steady, startup and simultaneous load information | A single nominal current does not describe every event. |
| Device-terminal voltage | Cable arrangement and representative measurements | Supply-terminal voltage can differ from voltage at the load. |
| Mechanical installation | Exact drawing, fixing holes and cabinet layout | A shallow chassis still needs real fastening and ventilation. |
Keep the exact model and source label with the order
The official WEHO LRS-35 product page and inspected specification identify the LRS-35-24 row as 24 V / 1.5 A. The original photograph carries that full model and its original direct-current graphic; the artwork and label are retained, not rewritten to fit an illustration. Keep the exact ordered variant, original photograph and approved drawing revision in the procurement file.
The photographed nameplate marks AC input as 100–240 VAC, 0.74 A, 50/60 Hz. Treat that nominal marking separately from wider input ranges or other figures appearing in different family documents. The public table and current approved sheet contain revision differences, so this article does not combine them into extended-input, temperature, certification or efficiency promises. Obtain the instructions applicable to the supplied revision.
Use the low-profile chassis without inventing its mount
The mechanical dimensions are 82 mm across the front terminal face, 99 mm front-to-rear and 30 mm high. These axes are important: a 30 mm profile does not make the supply a narrow upright DIN unit. Plan the fixing surface and service access around the complete enclosure, its terminal guard and the actual cable bends.
The approved drawing documents two M3 bottom fixing points with screw penetration no greater than 3.0 mm, and two M3 side fixing points with penetration no greater than 5 mm. Use the applicable documented arrangement and the equipment builder’s mechanical design. Do not invent an adapter, add feet, hang the case from a rail or let it rest unsecured on a wiring duct. The illustrations do not expose the hidden fixing threads or prove that a depicted orientation is thermally approved for every operating condition. Installation must not obstruct the original mesh ventilation or make adjustment and terminal access impractical.
A dry, protected electrical compartment separates this component from ink, cleaning liquid and moving printing mechanisms. A photograph of an open service bay illustrates the internal arrangement; it does not authorize exposed operation, establish an ingress rating or prove the complete machine’s electrical safety.
Check the five real terminal connections
The original left-to-right legends are L, N, protective earth, −V and +V, with five screw-clamp positions under the transparent guard. Conductors enter the real clamp mouths below the screw heads, not the screwdriver slot, plastic shield, trim aperture or ventilation mesh. Keep the photographed order and the supplied instructions; a plausible-looking wire is not sufficient evidence of a correct connection.
During qualification, compare the voltage at the supply with the voltage at the intended device under relevant operating states. Include cable length, connection quality and simultaneous events in the investigation. Do not claim a measured result, universal reserve percentage or completed commissioning from an application illustration.
Make the engineering handover traceable
Provide the exact model and revision, required voltage and polarity, load information, cable arrangement, fixing design and protected compartment drawing. Resolve any discrepancy between the sample marking and requested variant before ordering. The objective is a controlled auxiliary branch, not a compact product fitted wherever there is an empty space.
Frequently asked questions
Does every printing press use a 24 V control supply?
No. Confirm the actual device requirements and approved branch drawing before choosing a voltage variant.
Can this candidate power the whole press?
No such claim is made. The documented 24 V / 1.5 A output is an auxiliary-supply example, not the motor, heating or complete equipment requirement.
Can the LRS-35-24 be shown on a DIN rail?
Not as a native rail-mounted product. This exact source package documents chassis fixing holes, not an integral DIN attachment.
What should a buyer request besides a model name?
The exact revision, original sample identification, installation instructions, branch requirements and drawing-controlled fixing arrangement.
