1 Philosophy
PowerSentrix UPS was built as an accessible alternative to enterprise power backup solutions from major vendors. Professional features — per-port remote control, per-output measurement, open API — are typically available only at premium prices within closed proprietary ecosystems. PowerSentrix delivers the same capabilities with an open architecture and modular hardware.
Turn individual ports ON or OFF remotely via the web portal, or locally via the BLE app directly from your mobile phone without requiring network access.
Name every output port after the connected device. You always know what runs on which port — no guessing during an outage.
Voltage and current measurement on each of the 12 output ports, plus total device consumption. Always know the actual power draw of every connected device.
Remotely switch the UPS from mains to battery mode. Test the actual (not calculated) battery life under real load — anytime, without physical access.
Replace only the faulty component yourself — no need to discard the entire unit. Every block (charger, DC converter, control board) is available as an individual spare part. An economical and eco-friendly solution.
Integrate the UPS into your own infrastructure. The open JSON REST API lets you build a custom central management system or plug the device into your existing monitoring platform.
In addition to the main battery connector, the UPS has a 3-pin measurement input placed between 4 batteries — it monitors each cell's voltage independently and detects a weak cell before it causes a failure.
Inputs IN1, IN2 and outputs O1, O2 are freely configurable. The UPS can serve as a fire or security alarm. Outputs O1 and O2 can switch 230 V circuits.
2 System Overview
The PWX-12-4422 system consists of four main blocks. Each block is a standalone unit that can be ordered as a spare part — replacing one component does not affect the others.
| Component | Function | Available models |
|---|---|---|
| Meanwell LAD | Charger / UPS module — converts AC mains to 48 V DC and charges batteries | LAD-120 · LAD-240 · LAD-600 |
| Meanwell PSD-45A | DC/DC step-down modules — convert 48 V to lower voltages for each output group | PSD-45A-24 · PSD-45A-12 · PSD-45A-05 |
| Main connector board | Manages 12 output ports — individual switching of each port, voltage and current measurement | PWX-12-4422 |
| Control board (ESP32) | Communication (LAN, BLE, SNMP, REST API), monitoring and control logic | ESP32 + STM32 |
3 Front Panel
Description of the connectors and elements on the front panel of the PWX-12-4422 (1U rack). Connectors are arranged left to right.
| Connector | Description |
|---|---|
| BAT | Two-pin connector for battery pack connection (+/−). The system works with 48V batteries (e.g. 4× 12V lead-acid or LiFePO₄). |
| BAT MEAS. | Three-pin measurement connector. The other end is placed between 4 batteries (between each pair of cells), enabling individual cell voltage monitoring and weak cell detection. |
| WEB/BLE | Button with LED indicator. Blinks = WEB management mode active (access via browser or API). Solid = BLE mode for the Android UPS Manage app. |
| OUT 1–4 (48V) | Four 48V DC output ports. Each port is individually switchable and measurable. |
| OUT 5–8 (24V) | Four 24V DC output ports. Optionally connectable to the 48V bus. Each port is individually switchable and measurable. |
| OUT 9–10 (12V) | Two 12V DC output ports. Individual switching and measurement. |
| OUT 11–12 (5V) | Two 5V DC output ports. Individual switching and measurement. |
| LAN | Ethernet RJ45 — connect the UPS to the network for WEB management, SNMP and REST API. |
| IN1, IN2 | Digital inputs — voltage-free contact (closed/open). Configurable actions on state change (e.g. trigger alarm, change output state). |
| O1, O2 | Digital outputs — relay contact. Can switch 230V AC circuits. Configurable switching logic including response to IN1/IN2 inputs. |
The rear panel of the device contains a RESET CONFIG button. Holding it for approximately 5 seconds restores factory settings — including the Web Management password. Use this if you have forgotten your access password and have no other way to access device management.
4 Port Management
Each of the 12 output ports is independently manageable — it can be turned off, on, or restarted remotely (web portal, API) or locally (BLE app). The operation is executed immediately without physical access to the device.
Special feature: Port Restart
Solution: The UPS can perform a port restart as a single atomic command: turn off port → wait a set time → turn on port. This entire sequence runs autonomously within the UPS, independent of the network connection. The network is interrupted only for the brief restart period, after which it automatically restores — and remote management is available again.
| Operation | Available via | Description |
|---|---|---|
| Turn port OFF | Web · API · BLE | Immediate shutdown of the output port. The device stops receiving power. |
| Turn port ON | Web · API · BLE | Immediate activation of the output port. |
| Restart port | Web · API · BLE | Turns the port off, waits a set delay (configurable), then turns it back on. The full sequence runs autonomously — safe even on the port through which the UPS is connected to the network. |