en
UPS module

WB-UPS v.3

on DIN rail
UPS module

Lithium-ion Battery Uninterruptible Power Supply (2×18650).

During a loss of input power, it provides 9 V to 25 V output to loads not exceeding 15 W.

Main Features

Advantages

  • Power supply and batteries integrated in a single enclosure;
  • DIN rail mounting;
  • Modbus RTU interface;
  • Supplied with two time-tested 18650 batteries;
  • Built-in safety features;
  • Extended battery lifespan;
  • Parallel operation mode for multiple WB-UPS v.3 units powering a single load.

Technical Specifications

  • Input voltage: 10–27 V;
  • Backup mode output: fixed voltage adjustable from 9 V to 25 V when input power is unavailable;
  • Rated / peak power: 15 W / 20 W;
  • Rated capacity: 15 Wh;
  • Backup time at 15 W load: 60 minutes;
  • Operating ambient temperature: −20 to +45 °C;
  • Warranty period: 2 years;
  • Service life: 5 years;
  • Dimensions (L × W × H): 36 × 90 × 58 mm.

Safety

Four independent battery overvoltage protection levels:

  1. The microcontroller gradually stops charging when the battery voltage reaches 8.1 V;
  2. Hardware protection A prevents charging above 8.2 V;
  3. Protection B stops charging if the voltage of any cell exceeds 4.25 V;
  4. Protection C blows a “sacrificial” fuse if the voltage of any cell exceeds 4.3 V. Three independent overcurrent protection levels:
  • Charge and discharge currents are limited;
  • The battery is disconnected if the current exceeds 4 A;
  • The fuse blows in case of a short-circuit current. The battery is protected against overheating both by hardware and software mechanisms.

Prolonged Battery Service Life

Battery temperature is monitored during both charging and discharging to prevent accelerated wear and dendrite formation.

Charging the battery to 8.1 V instead of the standard 8.4 V significantly increases its lifespan with only a minor reduction in usable capacity.

Full discharge is prevented — the load is disconnected when battery voltage drops to 6 V.

A balancing circuit equalizes the voltage across the cells, ensuring uniform charge levels.

Parallel Operation Mode

If the power or capacity of a single WB-UPS v.3 is insufficient, multiple units can be connected in parallel, with this mode enabled in the settings. The devices will automatically share the load between them.

Transport Mode

Engaging the hidden button cuts off the battery to avoid discharge. The battery is re-enabled automatically once external power is available. This prevents UPS battery depletion during delivery.

Modbus RTU

The device status information available via Modbus RTU includes:

  • Operating mode;
  • Battery charge level;
  • Input and output voltages;
  • Battery temperature;
  • Battery current;
  • Input current;
  • Input current used for battery charging;
  • Output current when running on battery;
  • Front panel button status and counters for button presses (short, long, double short, short + long). Moreover, device parameters can be configured via Modbus RTU:
  • Operating mode;
  • Output voltage;
  • Maximum battery charge and discharge currents. It also enables turning the load on or off when external power is absent.

Configuration

The device can be configured via the Wiren Board controller’s web interface.

When used with other equipment, configuration is performed by writing setup parameters to the corresponding Modbus registers.

Interface

The device card in the Wiren Board controller’s web interface displays all channels enabled in the settings.

Fast Modbus support

All Wiren Board devices, in addition to standard Modbus RTU, can operate with its extension Fast Modbus ⚡, which adds new capabilities:

  • instant polling of input states and measured values via events;
  • quick discovery of devices connected to the controller;
  • automatic resolution of address conflicts on the bus. These features are enabled automatically — if the device supports Fast Modbus, the controller will use it. Otherwise, it falls back to standard Modbus RTU.

Quality control at each stage of production

We develop and manufacture all Wiren Board devices ourselves. Also everyone devices undergo multi-stage quality control:

  • During development - checking the components used for compliance with the declared ones characteristics and testing of the prototype device at extreme operating conditions.
  • After installation of SMD components - automated optical control.
  • After soldering the lead components - visual inspection of soldering.
  • After assembling the device, functional testing on an automated stand.
  • When shipped to the warehouse - control of completeness, stickers, appearance.

Thanks to this approach, the failure rate is no more than 0.5% of all released devices.

If the device fails within two years from the date of purchase, we will replace it for free without need to be sent to a service center.

Any questions? Please contact us.

Legal purchase terms

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    • Quantity
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