Smart Relay with Electricity Measurement (DIN)
User Manual

Smart Relay with Electricity Measurement (DIN)

SKU: PW-ACT-SRM-DIN

Table of Contents

1. Product Description

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  1. N Pole
  2. L Pole
  3. Max Adjustable Current
  4. Model Number
  5. LED indicator
  6. Button Switch
  7. Circuit Diagram

2. Product Size

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W: 18 mm

H: 82 mm

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D: 51 mm

  1. 35 mm

3. System requirements

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The PIERRE Wave (Zigbee 3.0, 2.4 GHz) system consists of the following components.

Required

  1. PIERRE Wave products: switches, modules, sensors, thermostats and other devices. They connect wirelessly to the gateway.
  2. Gateway: a PIERRE display and/or gateway. It links all PIERRE Wave devices and handles the communication with the app.

Optional

  1. Smart PIERRE app: control and monitoring from a smartphone or tablet. Not required for basic operation.
  2. Router: gives the gateway internet access for remote control.

Operation: the gateway connects to the router by Wi-Fi or LAN. PIERRE Wave products communicate wirelessly with the gateway in both directions: commands are sent and status updates are received through the Smart PIERRE app.

What you need

Zigbee gateway: a PIERRE display and/or gateway. One of those must already be commissioned before the device can be added.

4. Safety Instructions

  • Installation must be performed by a qualified electrician.
  • Always disconnect the mains power supply before wiring or maintenance.
  • Ensure the maximum rated current (63 A) is not exceeded.
  • The relay must be installed in a dry, ventilated environment on a DIN rail.
  • Do not cover the ventilation openings.
  • Comply with local electrical regulations.

5. Installation

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  1. Mount the relay securely on a DIN rail.
  2. Connect L (Live) and N (Neutral) from the mains to the upper terminals marked Power.
  3. Connect the load (e.g. water heater, convector, radiator) to the lower terminals marked Load.
  4. N → Neutral to the load
  5. L → Live to the load
  6. Tighten all screws and verify the connections.
  7. Switch on the mains power and check the LED indicator.

Diagram reference:

  1. Water heater
  2. Convector heater
  3. Radiator

6. LED Indicator Description

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The LED indicator flashing blue indicates the device is in pairing mode.

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The LED indicator solid blue shows the switch is on.

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The LED off indicates the switch is off.

7. Cable and wiring

Run Wires Cross-section Cable type Conductors
From distribution board to smart relay 2 1.5 mm² NYM-O L, N
From smart relay to load 2 1.5 mm² NYM-O L, N

Two runs, two conductors each. The first brings the supply from the distribution board into the relay; the second carries the switched output from the relay to the load. Both are line and neutral only — no signal wire, because the relay is commanded over Zigbee rather than by a physical input.

8. App-to-Device Pairing

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Please scan the QR code to download PIERRE application

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Log in with your Username and Password

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Open Settings and press "Add Wave I/O"

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Press and hold the Button Switch for 10 seconds until the Indicator Light starts flashing

  1. Smart Relay
  2. PIERRE Wave Gateway 
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Press "Find Devices"

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PIERRE application will show the list of available devices. Press "Add found devices"

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Enter Name, Role and Group settings and Save it

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When the Light indicator stops flashing, the PIERRE Wave pairing process is finished

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Last updated: October 06, 2026