Last Updated: September 25, 2026
Risposta rapida: For a battery-backed access-control system, the WEHO PSC-150-12 is a candidate only when both the field equipment and battery are compatible with a 13.8V bus. The current PSC-150 specification lists CH1 at 13.8V/7.5A, CH2 charging at 13.8V/3A, and 150W total output, in a 159 × 97 × 30 mm case. Do not treat “12V” in the model name as a guaranteed 12.0V load output or add the two channel currents without checking the aggregate power and operating state.
Access-control buyers often ask for a “12V UPS power supply.” That phrase leaves crucial questions unanswered: Does the door controller tolerate a 13.8V charging bus? What are the lock’s pull-in and hold currents? How much battery recharge current is required after an outage? What is the permitted door-release behavior when mains power or battery power disappears? These questions define the system before a power-supply model is chosen.
WEHO’s English PSC product page identifies the UPS/charger family. Its detailed model table and the current enterprise-drive PSC-150 sheet agree on the PSC-150-12’s 13.8V outputs and 159 × 97 × 30 mm enclosure. The page’s short introductory paragraph conflicts with that detailed table, so this article relies on the current sheet and table, not the introductory wattage or size claim. Obtain the exact ordered revision before procurement release.
Start with voltage compatibility, not the label
The PSC-150-12 sheet calls the main output CH1 13.8V, not 12.0V. Its charging output CH2 is also 13.8V. A controller, reader, alarm module, lock, or relay marked “12V” may or may not accept 13.8V over the full environmental range. Check every load’s allowed voltage and tolerance; if any load requires a tightly regulated 12.0V, use a suitable downstream regulator or a different supply architecture rather than assuming the PSC is safe.
The external battery chemistry, float-charge voltage, temperature needs, cable protection, and required backup time must also be compatible with the ordered revision. The product’s UPS function does not by itself prove a battery choice or a runtime.
Budget load and charging together
The following is an *illustrative* access-control operating state, not a claimed customer installation:
| 13.8V main-bus load | Example concurrent current | Approximate power |
|---|---|---|
| Door controller and network interface | 1.1A | 15.2W |
| Two readers and sensors | 0,8 A | 11.0W |
| Lock/strike in the defined active state | 1,5 A | 20.7W |
| Alarm/status accessories | 0.6A | 8.3W |
| CH1 example total | 4.0A | 55.2W |
The current sheet lists CH1 at 7.5A rated and CH2 at 3A charging, with 150W total output. If charging reaches the cited 3A while the example CH1 load is 4.0A, the simple 13.8V × 7.0A calculation is about 96.6W, below the stated 150W aggregate. That does not validate battery-charge behavior, overload response, or lock transients. Confirm from the ordered documentation whether the channel figures can occur together in the required operating state, and measure the real system during recharge after an outage. Never design for 7.5A main plus 3A charging solely by adding two nameplate entries.
The current exterior size is 159 × 97 × 30 mm (length × width × height). The shallow honeycomb metal housing, exposed terminal area, PCB extension, and battery leads need a protective enclosure with safe service access. The outer dimensions do not specify wall-box clearance, conductor bend space, fuse-holder room, or battery space.
Engineer the mains and battery boundaries
The current sheet states that the AC input range is selected by a toggle switch between 90–132VAC and 180–264VAC. For the worked 230VAC site, verify the correct switch position on the exact unit *before energizing*. Do not treat the broad public-page input sentence as evidence that no selector action is required. A qualified installer should check upstream protection, protective earthing, terminal assignment, battery polarity, conductor sizes, and the local fire/access-control rules.
Battery circuits can deliver high fault current. Place protection and disconnects according to the battery, cable, charger, enclosure, and applicable standard. Verify the configured door’s fail-safe/fail-secure behavior and emergency egress requirements independently of the PSU choice. The rendered application scene illustrates the protected system boundary; it is not a wiring instruction for a particular door.
Prove the failure sequence
Commission at least four states: normal mains/load, mains failure on battery, mains restoration with battery recharge, and low-battery or fault response. Record the CH1 voltage at the farthest device, lock pull-in current, CH2 charge current, battery voltage, enclosure temperature, and transition behavior. A listed low-battery cut-off in the sheet is a device feature, but the project must still validate that the door controller and egress system behave correctly before the cut-off point.
The two application scenes show an office access-control enclosure and an OEM engineering-lab battery-switchover test with protected service boundaries. They are visual aids, not proof of safe wiring or a completed customer installation.
Punti chiave
- PSC-150-12 is a 13.8V-bus candidate; check every nominal “12V” field device for compatibility.
- The current sheet lists 7.5A CH1, 3A charging CH2, 150W total, and 159 × 97 × 30 mm exterior size.
- Budget simultaneous load and recharge within the aggregate rating and verify transients experimentally.
- Confirm the 230VAC selector setting, battery chemistry/protection, enclosure, egress behavior, and exact ordered revision.
- The public short description conflicts with its detailed table; do not merge the inconsistent figures.
Conclusione
PSC-150-12 can be evaluated for a battery-backed access-control bus when the 13.8V voltage, load state, battery, and installation boundary are explicitly defined. It should not be selected from the words “12V UPS” alone. The procurement record needs the current revision, electrical load matrix, battery/recharge requirement, enclosure drawing, and measured failure-sequence results.
Domande frequenti
Does PSC-150-12 output exactly 12.0V?
No. The current PSC-150 sheet lists 13.8V for both CH1 and CH2 on the -12 model. Check every field device’s permitted input range.
Can I add 7.5A main and 3A charging continuously?
Do not assume that from two rows. The same current sheet lists 150W total; verify the simultaneous operating state and ordered revision.
What is the current PSC-150-12 enclosure size?
The current enterprise-drive sheet and detailed official table list 159 x 97 x 30 mm, excluding installation, wiring, and battery clearances.
Does the model name guarantee a battery runtime?
No. Runtime depends on actual load, battery chemistry and capacity, allowable discharge, temperature, and the required safety behavior.
Is the input automatically universal?
The current sheet describes a selector for 90-132VAC or 180-264VAC. Verify its position for the actual site before energizing.
