RS-485, Modbus RTU module
For water metering and leakage control
Retail price
In stock 14 pcs.

Everything you need for a typical task of monitoring the “wet zone” of an apartment, house or industrial facility:

  • water leak detection
  • automatic control of shut-off valves
  • counting pulses from water meters even in the absence of electricity.

Up to 6 monitoring zones, “dry contact” outputs, “wet cleaning” mode and easy integration into the automation system.

The main differences from the previous version: by default, five inputs are configured for connecting sensors, input activation indicators, two buttons on the front panel, support for Larnitech sensors and a “wet cleaning” mode.



There are many leakage protection systems on the market, our differences:

  • Up to 6 monitoring zones and isolated inputs for connecting active or passive leakage sensors.
  • Accounting of meter pulses even in the event of a power failure (for up to 12 months).
  • Changeover relays with dry contact type outputs - connection of shut-off valve actuators with supply voltages up to 30 V DC and up to 250 V AC.
  • Local control of relay channels for forced opening of valve actuators or triggering scripts.
  • Quick response to a leak regardless of the central controller.
  • Works without the Internet, and to protect against leaks it is not necessary to have an automation system
  • Supports Larnitec floor-mounted sensors.
  • Fast and simple integration into automation and monitoring systems.

Supports Fast Modbs ⚡, which allows you to instantly deliver events from the module to the Wiren Board controller.



  • 6 universal channels for connecting leak sensors or buttons.
  • 2 channels for connecting pulse water meters.
  • 2 channels of 3 A each for controlling shut-off valve actuators.
  • Group isolation of inputs from the RS-485 bus.
  • Supply voltage: 9 to 28 VDC.
  • Interface: RS-485 with Modbus RTU.
  • DIN rail housing, 3 modules (54 x 90 x 58 mm).

Operating temperature from 0 to +60 °C - requirements are dictated by the use of Li-ION batteries.


When used with a Wiren Board controller, you can use the mouse in the web interface:

  • switch input operating modes: leakage sensor or button;
  • configure the reaction of outputs and alarm signals to triggered inputs;
  • set other module parameters.

Direct control from the buttons on the front of the module is also available.

When used with other equipment, the module can be configured via the RS-485 bus by writing values to Modbus registers. The register table is open, well documented and available online in the device documentation.

Status reading and control

If a Wiren Board controller is used, then the counter values, as well as the status of the outputs and alarms, are available in the web interface controller and can be used in automation scripts or transferred to a higher-level system. The device card displays only the channels enabled in the survey settings.

The module also transmits all data via Modbus RTU (RS-485), which can be read by any equipment or software that supports this protocol: third-party controllers, HMI panels or SCADA.

Legal purchase terms

General provisions

1. These terms of sale is developed on the basis of the RF Civil code, RF Law on February 7, 1992 № 2300-1 "On consumer protection", decrees of the Government of the Russian Federation of September 27, 2007 № 612 "On approval of rules of sale of goods remote way" and other normative-legal acts. These rules regulate the procedure for retail purchase and sale of Goods through the online store, being a public offer addressed to individuals and legal entities ("Buyers").

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