Smart ZigBee Single-Channel Relay Module B6Z, 8A,without PM, dry contact, TUYA

Smart 1-Channel ZigBee Relay Module NOUS B6Z, “Dry Contact”, without Energy Monitoring, TUYA

NOUS B6Z is a compact 1-channel ZigBee 3.0 relay module with a “dry contact” function, designed to automate lighting, gate control and other compatible electrical circuits. The module supports loads up to 8 A / 2000 W at 100–240 V AC and up to 5 A / 150 W at 30 V DC, while smart functions are provided through a TUYA-compatible ZigBee system.

The compact NOUS B6Z can be installed behind a wall switch or in a suitable installation or junction box. The module has separate relay input and output contacts, allowing the controlled circuit to be electrically isolated from the module's power supply. This expands the range of applications where a potential-free, or so-called “dry contact”, relay contact is required.

NOUS B6Z does not have an energy monitoring function, so it is focused on simple and flexible on/off control. ZigBee 3.0 connectivity allows the module to be included in smart home scenarios, used for group control and configured to determine how the relay should behave after the power supply is restored. A compatible ZigBee gateway is required for smart functions.

Key Features

• 1-channel smart relay module.
• “Dry contact” – potential-free relay contact.
• ZigBee 3.0 wireless technology.
• Up to 8 A / 2000 W load at 100–240 V AC.
• Up to 5 A / 150 W load at 30 V DC.
• Electromechanical relay.
• Without energy monitoring function.
• Can be controlled via an external wall switch.
• Physical control button on the module.
• Group control of multiple modules.
• Power state recovery function.
• “NOUS Smart Home” and “Tuya Smart Life” support.
• Compatible with “Home Assistant”.
• Support for “Amazon Alexa”, “Google Assistant”, “SmartThings” and “Siri Shortcuts”.
• Compact 29 × 34 × 17 mm housing.

Why Choose This Product?

• “Dry contact” relay output: separate I and O contacts allow control of a circuit that is electrically isolated from the module's power supply, making the B6Z suitable for a wider range of control systems.
• Suitable for AC and DC loads: the relay contacts can control loads up to 8 A / 2000 W at 100–240 V AC or up to 5 A / 150 W at 30 V DC.
• Turn a conventional switch into a smart switch: the SW input allows you to retain the physical wall switch while also using smart functions.
• Ultra-compact: measuring only 29 × 34 × 17 mm, the module is suitable for installation locations with limited available space.
• ZigBee 3.0 connectivity: the module can be integrated into a TUYA ZigBee smart home ecosystem and used in automation scenarios.
• State recovery: you can choose whether the relay should remain switched off, switch on or restore its previous state after a power outage.
• Group control: multiple compatible modules can be grouped together and controlled with a single action.

Who Is This Product For?

NOUS B6Z is particularly suitable for applications where energy monitoring is not required, but a compact and versatile smart relay contact is needed.

• Smart lighting users who want to retain conventional wall switches while adding smart control.
• Gate and automation systems where the control equipment accepts a potential-free contact signal and complies with the module's relay parameters.
• Home automation enthusiasts creating ZigBee and TUYA-based scenarios.
• “Home Assistant” users looking for a compact ZigBee 3.0 relay module.
• AC and low-voltage DC circuits where the load does not exceed the limits specified by the manufacturer.

Practical Applications for Lighting and Automation

• Install the module behind a wall switch and control the lighting both physically and through the smart home system.
• Use the potential-free relay contact to control the input of a compatible gate controller.
• Automate a suitable 30 V DC circuit with a load not exceeding 5 A / 150 W.
• Control a load of up to 8 A / 2000 W at 100–240 V AC.
• Combine multiple modules into a single group and control several circuits with one action.
• Include the B6Z in automation scenarios together with compatible motion, door or other ZigBee sensors.

When Is a “Dry Contact” Smart Relay Module Useful?

Not every device needs to be controlled by directly supplying it with 230 V. Gate automation systems, some control systems and other devices may have a separate contact input that only requires the circuit to be opened or closed. In such cases, a “dry contact” relay provides greater flexibility than a standard smart switch whose output supplies a voltage.

NOUS B6Z has separate I and O terminals for the relay circuit, allowing the circuit controlled by the relay to be isolated from the 100–240 V AC power supply required by the module itself. This allows a single compact ZigBee module to be used for conventional lighting as well as compatible low-voltage or contact-controlled systems.

Technical Specifications

Frequently Asked Questions (FAQ)

What does “dry contact” mean in the NOUS B6Z module?
“Dry contact” means that the relay's I and O contacts are isolated from the module's power supply circuit. The relay acts as an electrical switch and does not itself supply the module's power voltage to the controlled circuit.

What is the difference between NOUS B6Z and B5Z?
NOUS B6Z does not have energy monitoring or overload protection, but it has a “dry contact” relay output and can control both suitable AC circuits and DC circuits up to 30 V DC. B5Z is designed for 100–240 V AC loads and features energy monitoring.

Does NOUS B6Z require a ZigBee gateway?
Yes. The module uses ZigBee 3.0 connectivity, so a NOUS E1, E7, E15 or another compatible TUYA ZigBee gateway is required.

Does NOUS B6Z measure energy consumption?
No. This B6Z version does not have a power or electricity consumption measurement function.

What load can be connected to NOUS B6Z?
The relay contacts support up to 8 A / 2000 W at 100–240 V AC or up to 5 A / 150 W at 30 V DC. The limits specified by the manufacturer must not be exceeded.

Can a conventional wall switch be connected to NOUS B6Z?
Yes. The SW input is designed for an external switch, so the connected device can also be controlled using a conventional physical switch.

Can NOUS B6Z be used to control gates?
The “dry contact” relay may be suitable for gate automation if the specific gate controller input is designed for a potential-free contact signal. Before connecting, the gate automation manufacturer's wiring diagram and control input parameters must be checked.

Who should install NOUS B6Z?
Since the module itself requires a 100–240 V AC power supply, installation and electrical connection should be carried out by a qualified specialist in accordance with the manufacturer's wiring diagram and electrical safety requirements.

Choose the NOUS B6Z smart ZigBee “dry contact” relay module if you are looking for a compact solution for controlling lighting, gate automation or other compatible AC and DC circuits. ZigBee 3.0, the potential-free relay contact and ultra-compact housing provide greater flexibility when creating a TUYA smart home automation system.