Last Updated: September 27, 2026
Respuesta rápida: For a telecom site with a verified 230VAC input and a separate 24V auxiliary-load group totaling an illustrative 240W/10A, the WEHO RSP-320-24 is a reasonable first-stage candidate. The current WEHO specification lists 24V at 13.3A, active PFC and a 215 × 115 × 30 mm enclosure. A 25% design margin raises the example to 300W, below the 320W class. This applies only to 24V controllers, fans, relays and monitoring—it is not a replacement for the site’s −48V radio bus.
A 24V auxiliary power supply must be selected within a clearly defined telecom subsystem. This 24V auxiliary power supply example excludes the site’s −48V radio bus from the first line of the calculation.
Telecom cabinets often contain more than the primary radio-power architecture. Door controllers, ventilation fans, relay interfaces, protocol gateways, environmental monitors and alarm circuits may use a local 24V auxiliary rail. Those loads can be modest individually but important operationally: loss of a controller or fan can remove remote visibility or allow the cabinet to overheat even when the radio bus remains available.
El WEHO RSP-320 product page identifies the RSP-320 family and its active-PFC design. This review uses the current enterprise-drive RSP-320 specification for the controlling 24V/13.3A operating point, 90–264VAC input range and 215 × 115 × 30 mm envelope. The exact enterprise-drive product photo is also retained because it shows the real RSP-320-24 casing, top fan and nine-position terminal block.
Define the auxiliary boundary before choosing wattage
This worked example deliberately excludes the −48V radio bus. It covers only a separate 24V subsystem:
| 24V auxiliary load group | Illustrative worst-case power |
|---|---|
| Controllers and protocol gateways | 40W |
| Cabinet fans and thermal management | 80W |
| Relays and actuator interfaces | Los 48W |
| Monitoring and alarm circuits | 72W |
| Concurrent total | 240W |
At 24V, 240W corresponds to 10.0A. Applying a 25% design margin gives 300W. The current specification lists RSP-320-24 at 24V/13.3A in the 320W class, so the example passes the initial arithmetic screen. That headroom is not permission to attach radio equipment or an unmeasured heater. Each branch must remain within the verified 24V auxiliary scope.
This illustrative macrocell-shelter scene shows the source-controlled RSP-320-24 resting unwired on a rack shelf for mechanical fit, cable-routing and airflow planning; it is not an energized, commissioned or validated installation. The documented 215 × 115 × 30 mm shallow chassis is scaled against the rack spacing and shelf depth. Where availability matters, identify which 24V loads must survive a single fault. A larger single supply does not create redundancy. The project may require separated A/B sources, alarmed branch protection, DC hold-up, battery support or a serviceable spare strategy. Those requirements belong in the telecom power architecture, not in an optimistic wattage calculation.
Resolve the documented label revision before procurement
The current enterprise-drive specification states 24V/13.3A for RSP-320-24. The exact physical source photograph available in the same enterprise drive carries an older or different 24V/13.4A nameplate. This package preserves that source-photo label exactly rather than altering it. The worked selection and all article calculations use the more conservative current-sheet value of 13.3A.
Procurement should treat the difference as a revision-control item. Ask the supplier to confirm the label, data sheet and approval records for the units that will ship. Do not digitally rewrite a photographed label, and do not assume that a 0.1A difference is automatically acceptable across all temperature, compliance and production revisions.
Why active PFC and the 230VAC input matter
The current RSP-320 sheet specifies a 90–264VAC input range and active power-factor correction. At 230VAC and full load it lists a power factor of at least 0.95. Active PFC can help an OEM manage input current quality, but it does not remove the need to check inrush, upstream protective devices, generator compatibility or site harmonics.
The same sheet records a 40A cold-start impact value at 230VAC. The panel designer should evaluate the actual upstream breaker, fuse, contactor and any group-start sequence. A shelter with several power supplies energized together can trip protection even when the steady-state input current appears small.
The terminal assignment follows the documented nine-position layout: AC line, AC neutral and protective earth at terminals 1–3, three negative-output terminals at 4–6 and three positive-output terminals at 7–9. The product also provides a CN2 remote on/off connection. Use that interface only if the exact ordered instructions and the site’s control logic require it; do not invent a remote-control function from the connector name alone.
Protect and monitor the 24V branches
Divide controllers, fans, relay interfaces and monitoring circuits into appropriately protected branches. A shorted door actuator should not remove environmental monitoring, and a failed fan branch should generate an alarm before the shelter overheats. Size conductors and protection for the cable, terminal, fault current and connected equipment—not merely for the supply’s 13.3A model-table value.
For each branch, calculate round-trip voltage drop at the highest expected current and cable temperature. Measure voltage at the farthest controller or fan bank during worst-case operation. Low-voltage monitoring devices can reset before a technician notices a visibly weak fan, so capture transient minimum voltage during relay pickup and group fan start.
The two illustrative staging environments intentionally differ. The indoor macrocell shelter emphasizes dense rack service, cable segregation and continuous ventilation, while the rooftop small-cell setting emphasizes weather protection, temporary instrumentation and field-access safety. In both images the source-controlled RSP-320-24 is visible but intentionally unwired for fit-planning; neither scene is an energized, commissioned or validated installation. In the rooftop cabinet, neighboring modular breakers and shelf fittings provide scale for the documented 215 × 115 × 30 mm chassis without implying a DIN-rail clip on the shelf-mounted supply.
Make room for fan cooling and maintenance
The current mechanical envelope is 215 × 115 × 30 mm. The enclosure drawing is not the complete installation envelope. RSP-320 includes a top fan and ventilation openings, so a flat 30mm product height does not justify a 30mm-high sealed cavity. Provide the required air path, inlet cleanliness, exhaust space, service access and separation from hot radio equipment.
Fan cooling also changes the maintenance plan. Dust loading, filter condition and fan health need attention over the site’s life. If the auxiliary cabinet is outdoors, the outer enclosure must provide suitable weather and contamination protection while still managing the internal heat. Do not expose the open-frame supply directly on a rooftop or assume the product’s metal cover is an outdoor weatherproof enclosure.
The diagram summarizes the scope: 230VAC feeds RSP-320-24, then protected 24V branches serve auxiliary controllers, fans, relays and monitoring. It explicitly stops at that boundary. It is not a −48V distribution drawing, a grounding plan or a construction schematic.
Commission under real site conditions
Before release, verify the actual 230VAC input, peak and steady branch currents, enclosure temperature, fan airflow, far-end voltage and cold-start behavior. Test normal operation, the highest ambient expected inside the closed cabinet, restoration after a mains interruption and any remote on/off sequence. Confirm that alarms remain available during a single branch fault.
Record the exact label revision. For the source set used here, the physical photo shows 13.4A while the current sheet states 13.3A. The delivered unit, its data sheet and the commissioning record must agree. If they do not, stop and resolve the revision before installation rather than averaging the values.
Conclusiones clave
- The example covers only a separate 24V telecom auxiliary rail; it does not feed or replace a −48V radio bus.
- A 240W auxiliary load draws 10A at 24V; a 25% design margin raises the target to 300W.
- The current sheet lists RSP-320-24 at 24V/13.3A with active PFC and a 215 × 115 × 30 mm enclosure.
- The enterprise-drive source photo shows a 13.4A label; procurement must reconcile that revision difference before release.
- Check 230VAC inrush, branch protection, voltage drop, fan airflow, ambient derating and redundancy strategy.
- Keep the open-frame fan-cooled supply inside a suitable closed auxiliary enclosure with a defined thermal path.
Conclusión
For the defined 230VAC, 24V, 240W auxiliary-load example, RSP-320-24 offers appropriate nominal capacity and active-PFC input behavior. Its selection remains conditional on a clear separation from the −48V radio bus, verified label revision, measured startup demand, protected branch architecture and a cabinet that can cool and service the fan-cooled supply throughout the site’s life.
Preguntas frecuentes
Can RSP-320-24 power the telecom site’s minus 48 volt radio bus?
No. This article covers a separate 24V auxiliary rail for controllers, fans, relays and monitoring. It is not a replacement for the site’s −48V radio-power architecture.
How much current does the 240W example draw?
At 24V, 240W corresponds to 10.0A. A 25% design margin raises the target to 300W.
Why does the product photo show 13.4A while the current sheet states 13.3A?
The available photo and current specification appear to represent different label revisions. This review preserves the photographed label exactly but uses the more conservative 13.3A sheet value. Procurement must confirm the label and data sheet for the units that will ship.
What does active PFC change for a 230VAC telecom cabinet?
The current sheet lists power factor of at least 0.95 at 230VAC and full load. Active PFC does not eliminate inrush or upstream-protection checks; the same sheet records a 40A cold-start impact at 230VAC.
Can the RSP-320-24 be installed in a sealed 30mm-high cavity?
No assumption like that is safe. Although the product is 30mm high, it has a top fan and ventilation openings. The outer enclosure needs a verified airflow path, thermal margin, contamination control and service clearance.
