Last Updated: September 27, 2026
Szybka odpowiedź: The WEHO S-150-24 is a practical first-pass candidate for a 230VAC machine panel whose verified 24V servo-brake and control loads total no more than 6.5A. In the worked example below, a 5.30A concurrent control load uses 127.2W and leaves 1.20A of nameplate current margin. The servo motor power stage is not included: it remains on its dedicated servo drive. Final release still depends on brake pickup current, voltage drop, ambient temperature, enclosure ventilation, protection, and confirmation that the input-voltage selector is correctly set.
Start With the Electrical Boundary
“Power supply for a servo motor” can be misleading. In a normal industrial motion system, the motor is energized by a servo drive, not by a general-purpose 24V switching supply. The separate 24V supply commonly supports holding brakes, PLC and distributed I/O, safety relays, sensors, HMI electronics, contactor coils, and pneumatic valves.
That boundary matters to OEM buyers. If the motor or drive DC bus is accidentally included in the 24V load calculation, the result is not merely conservative; it describes a different electrical architecture. The correct purchasing question is therefore: what is the worst simultaneous current of the verified brake and control loads, and what transient behavior occurs when the machine changes state?
The source-controlled product detail above identifies the exact S-150-24 rather than a generic enclosed supply. The photographed label and the current WEHO specification support a 24V output rated to 6.5A. The seven-position terminal arrangement provides line, neutral, protective earth, two negative output terminals, and two positive output terminals. Those duplicated DC terminals are connection points; they do not create separate independently regulated outputs.
Worked 24V Load Map for a Servo-Control Panel
The following values illustrate the selection method. They are not substitutes for the current consumption and duty-cycle data from the actual brake, PLC, safety, valve, and sensor suppliers.
| Verified 24V load group | Worked concurrent current |
|---|---|
| Four servo holding brakes at 0.65A each | 2.60A |
| PLC, remote I/O, and HMI electronics | 0.90A |
| Safety controller, interposing relays, and contactor coils | 0.60A |
| Pneumatic valve coils expected on together | 0.80A |
| Sensors and industrial-network devices | 0.40A |
| Worked concurrent total | 5.30A |
At 24V, the worked total is 127.2W. Compared with the 6.5A S-150-24 nameplate, this leaves 1.20A, or about 18.5% of rated output current, before any project-specific derating. That arithmetic is a useful gate, but it is not a complete design approval.
Brake release can create a short pickup demand above the steady holding current. Several brake coils can also be commanded at once during a reset or safety sequence. Obtain the brake-current curve, define the true simultaneous event, and confirm the acceptable 24V bus dip at the most remote load. If the transient or thermal check fails, split the loads or select a supply with verified headroom rather than assuming the nominal 150W label is enough.
This illustrative CNC service scene shows the source-controlled S-150-24 openly mounted in a compact auxiliary panel beside the machining cell. The native S-150-24 label, 115VAC 3.2A / 230VAC 1.6A / 50/60Hz input text, red selector, separate caution panel, seven-terminal short end, and documented 199 × 110 × 50 mm envelope remain visible at practical scale against the servo drive, fuses, fasteners, and wire duct. The supply represents the worked brake-and-control bus, not the spindle or servo-drive power path; this is not a customer installation, commissioning record, or measured performance test.
Why the S-150-24 Fits This Worked Example
The S-150-24 is an enclosed, fanless switching supply intended for equipment integration. The current enterprise specification lists a 24V/6.5A model, a switched AC input range of 90–132VAC or 180–264VAC, and an exterior envelope of 199 × 110 × 50mm. Natural-convection cooling is specified, so the surrounding enclosure, mounting direction, spacing, and actual internal temperature remain part of the machine designer’s responsibility.
For the worked 230VAC panel, the high-line selector position must be verified before energization. A selector error is a commissioning hazard and cannot be corrected by software. Record the intended input range on the electrical drawing, inspect the selector during panel QA, and include it on the power-on checklist.
The specification’s dimensional envelope should also be treated as the product body size, not as the required installation volume. Cable bend radius, terminal access, finger-safe covers, wire duct, ventilation space, and service-tool access add to the cabinet footprint. Procurement should release the exact S-150-24 drawing and revision to the panel builder rather than sizing the backplate from a marketplace photo.
Use Different Machine Contexts Without Changing the Selection Logic
The same 24V selection method can apply to another machine only when its measured load map supports it. A robotic palletizer may have different brake duty, a larger safety system, more valves, and longer cable runs than a CNC station. Similar voltage does not mean identical loading.
This second illustrative setting shows the source-controlled S-150-24 in a wider open control cabinet beside an end-of-line robot palletizer and conveyor. The long label/selector/caution side remains perpendicular to the seven-terminal short end, while PLC modules, fasteners, wiring duct, and the guarded robot cell provide scale for the documented 199 × 110 × 50 mm chassis. The palletizer composition is materially different from the compact CNC service bay, and it is not evidence of a commissioned customer panel or permission to copy the worked CNC load table into another machine; the motor-energy path remains on its dedicated drive.
For either machine, use these steps:
- List every 24V device by exact part number and maximum current.
- Separate steady loads from pickup, brake-release, valve, and contactor events.
- Build a state table for homing, automatic cycle, safe stop, and recovery.
- Calculate conductor voltage drop at the farthest brake or control branch.
- Apply the manufacturer’s ambient-temperature and installation guidance.
- Coordinate branch protection and conductor size with the available fault current.
- Verify the completed panel at minimum and maximum operating conditions.
Installation and Commissioning Checks
Keep the Motor Energy Path Separate
The servo drive and motor power path must remain outside this 24V total unless a verified system drawing states otherwise. The S-150-24 in this example supplies only the brake and control bus. Bond protective earth correctly and follow the applicable machinery, panel, and local electrical standards.
Check Remote Voltage at the Event That Matters
Measure the voltage at the farthest brake while the intended simultaneous release event occurs. A healthy reading at the supply terminals does not prove that the load receives sufficient voltage through long conductors, connectors, and protection devices.
Verify Thermal Conditions in the Closed Cabinet
Natural convection depends on airflow around the enclosure. Heat from servo drives, braking resistors, contactors, and other supplies can raise the local air temperature well above the room temperature. Use the actual cabinet thermal study and the current product specification, not an assumed “150W continuous” label, to approve the installation.
Record Revision-Controlled Evidence
Before a production order, confirm the exact model, label, input selector, dimensions, terminal assignment, output rating, and specification revision. If any source conflicts, stop and resolve the ordered revision instead of combining values from different documents.
The engineering reference keeps the design boundary explicit: the worked 5.30A control load is below the 6.5A rating, while the servo motor power remains on its dedicated drive. It is a screening calculation, not a declaration that every servo application is approved.
B2B RFQ Checklist
Send the following with an RFQ so the supplier and panel builder can review the same design case:
- Exact requested model: WEHO S-150-24.
- Site input voltage and frequency, including the required selector position.
- Device-level 24V load list and the worst simultaneous operating state.
- Brake steady current, pickup behavior, release timing, and permitted voltage dip.
- Cabinet ambient estimate, mounting orientation, and available ventilation.
- Required terminal protection, branch protection, conductor sizes, and cable lengths.
- Exact mechanical drawing and revision required for panel release.
- Applicable machine, panel, EMC, and market-compliance requirements.
Kluczowe dania na wynos
- The S-150-24 is selected here for a verified 24V brake-and-control bus, not for the servo motor power stage.
- The worked 5.30A load uses 127.2W and leaves 1.20A of nameplate current margin below the 6.5A rating.
- Brake pickup, simultaneous machine states, voltage drop, enclosure temperature, and protection can overturn a simple wattage comparison.
- The 90–132VAC / 180–264VAC input selector must be checked and documented before power-on.
- The documented 199 × 110 × 50mm body still needs additional cabinet space for wiring, ventilation, protection, and service access.
- Different machine types require separate load maps even when they use the same 24V nominal bus.
Wniosek
The WEHO S-150-24 is a defensible candidate for the worked 230VAC servo-brake and control-panel example because the verified 5.30A concurrent load falls below the 24V/6.5A rating. A production decision should proceed only after the machine builder validates transient brake demand, remote voltage, enclosure temperature, selector position, protection, and the exact ordered revision. This source-controlled process gives B2B buyers a repeatable selection record without pretending that one product or one load table fits every servo application.
Często zadawane pytania
Can the S-150-24 power the servo motor directly?
Not in the architecture evaluated here. The servo motor is powered by its dedicated servo drive. The S-150-24 is evaluated only for the verified 24V holding-brake and machine-control loads.
How much current margin remains in the worked example?
The illustrative concurrent load is 5.30A at 24V. Against the S-150-24 nameplate rating of 6.5A, that leaves 1.20A, or about 18.5% of rated current, before project-specific thermal, transient, and voltage-drop checks.
Why must the input-voltage selector be checked?
The current specification identifies switched 90–132VAC and 180–264VAC input ranges. The selector must match the actual supply before energization; a wrong setting is a commissioning hazard and cannot be corrected in software.
Do the two positive and two negative terminals create two outputs?
No. They are duplicated connection points on the same regulated 24V output. Branch protection and conductor selection still require an engineered distribution design.
What must be confirmed before placing a production order?
Confirm the exact S-150-24 revision, input voltage and selector setting, device-level load table, brake pickup demand, allowable voltage drop, cabinet thermal conditions, protection, dimensions, and applicable compliance requirements.
