HLK SW16 16 Channel WiFi Controlled Relay Board
HLK SW16 16 Channel WiFi Controlled Relay Board
HLK SW16 16 Channel WiFi Controlled Relay Board
The HLK SW16 is a 16-channel WiFi-enabled relay control module designed for remote switching and automation of high-power electrical loads via smartphone or web interface. Industrial automation engineers, IoT developers, and smart home integrators use this board to build distributed control systems for machinery, lighting, HVAC systems, and power distribution networks. This product solves the critical challenge of implementing wireless load control without complex wiring infrastructure, enabling real-time monitoring and switching of up to 16 independent circuits from anywhere with internet connectivity.
Product Overview
The HLK SW16 operates on a microcontroller-based architecture that communicates via WiFi 802.11 b/g/n standard, allowing each of the 16 relay channels to be independently controlled through a dedicated mobile application or web dashboard. Each relay channel is rated for AC 250V/10A or DC 30V/10A switching capacity, making it suitable for controlling everything from low-voltage LED systems to high-power industrial motors. The board features isolated relay outputs with NO/NC/COM contacts, ensuring galvanic isolation between control circuits and load circuits, which is essential for preventing ground loops and protecting sensitive electronics from voltage spikes.
What distinguishes the HLK SW16 from standard relay modules is its integrated WiFi connectivity without requiring external WiFi modules, combined with built-in surge protection and thermal management. The device supports both local network control and cloud-based remote access, allowing users to set up time-based automation schedules, conditional logic triggers, and real-time status monitoring. The compact DIN-rail mountable form factor makes it ideal for installation in electrical panels and control cabinets, while the modular relay design allows replacement of individual channels without replacing the entire board.
Key Specifications
| Specification | Details |
| Product Type | 16 Channel WiFi Controlled Relay Module |
| Brand | HLK (Hualing) |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Number of Channels | 16 Independent Relay Channels |
| AC Switching Capacity | 250V/10A per channel |
| DC Switching Capacity | 30V/10A per channel |
| WiFi Standard | 802.11 b/g/n (2.4 GHz) |
| Operating Voltage | 12V DC (with onboard regulator) |
| Control Interface | Mobile App, Web Dashboard, API |
| Relay Type | Electromagnetic Relays with NO/NC/COM Contacts |
| Mounting | DIN-Rail or Wall Mount |
| Operating Temperature | -10°C to +55°C |
| Humidity Range | 10% to 90% (non-condensing) |
Key Features
- 16 Independent Relay Channels with individual control allowing simultaneous switching of multiple loads with microsecond precision and no crosstalk between channels
- Built-in WiFi Module eliminating the need for external WiFi shields, reducing component count and power consumption while simplifying circuit design
- Cloud and Local Network Control supporting both LAN-based operation for critical systems and cloud access for remote monitoring, with automatic failover capability
- Real-time Status Monitoring providing instant feedback on relay state, voltage levels, and power consumption metrics through the mobile application
- Programmable Automation Logic enabling time-based scheduling, sensor-triggered actions, and conditional switching without requiring external controllers
- Galvanic Isolation between control and load circuits preventing ground loops and protecting microcontrollers from high-voltage transients and EMI
- Thermal Management with integrated heat dissipation and overload protection automatically shutting down faulty channels to prevent cascading failures
- Modular Relay Design allowing individual channel replacement in the field without system downtime or complete board replacement
Applications and Use Cases
- Smart Home Automation Systems controlling lighting circuits, water heaters, air conditioning units, and security systems through centralized WiFi-based management with voice assistant integration
- Industrial Equipment Control managing motor starters, solenoid valves, pneumatic actuators, and power distribution in manufacturing facilities with real-time monitoring and predictive maintenance alerts
- Agricultural IoT Solutions automating irrigation systems, greenhouse climate control, and livestock management with weather-based triggers and remote farm monitoring capabilities
- Building Management Systems coordinating HVAC zones, lighting levels, access control, and energy distribution across commercial properties with occupancy-based optimization
- Laboratory and Research Automation controlling experimental equipment, power supplies, and data acquisition systems with precise timing and synchronized multi-channel switching
- Renewable Energy Systems managing solar inverter switching, battery charging circuits, and load distribution in off-grid and hybrid power installations
How to Use
Begin by connecting the HLK SW16 to a 12V DC power supply with at least 2A capacity to ensure stable operation of all 16 relay channels. Connect your load circuits to the appropriate relay terminals (NO for normally open, NC for normally closed, and COM for common), ensuring that AC loads do not exceed 250V/10A and DC loads do not exceed 30V/10A per channel. Use proper gauge wiring (minimum 2.5mm² for 10A circuits) and include appropriate fuses or circuit breakers on the load side for overcurrent protection. Mount the board in a well-ventilated enclosure to prevent thermal buildup, especially when operating multiple channels simultaneously.
Download the HLK WiFi control application from your device's app store and create an account. Connect the board to your WiFi network by entering your SSID and password through the app's setup wizard. Once connected, you can individually toggle each of the 16 channels, set up time-based schedules, create automation rules based on sensor inputs, and monitor real-time status of all channels. The web dashboard provides an alternative interface for desktop-based control and advanced configuration options. For advanced users, the REST API documentation allows integration with third-party home automation platforms like Home Assistant, OpenHAB, or custom IoT solutions.
Frequently Asked Questions
Can I control the HLK SW16 without internet connectivity?
Yes, the HLK SW16 supports both local network control and cloud-based access. When connected to your home or office WiFi network, you can control all 16 channels using the mobile app or web dashboard without requiring internet connectivity. Cloud access is optional and only needed if you want to control the device remotely from outside your local network. This dual-mode operation ensures reliability even during internet outages.
What is the maximum load capacity for each relay channel?
Each relay channel can switch a maximum of 250V AC at 10A or 30V DC at 10A. This translates to approximately 2.5kW for AC loads and 300W for DC loads per channel. For loads exceeding these ratings, you can use the relay outputs to trigger larger contactors or solid-state relays. Always include appropriate fusing on the load side to protect against short circuits and overloads.
Is the HLK SW16 compatible with smart home ecosystems like Alexa or Google Home?
The HLK SW16 can be integrated with popular smart home platforms through its REST API or by using compatible middleware like Home Assistant or OpenHAB. Some third-party developers have created custom Alexa and Google Home skills for HLK devices. Check the latest community forums and GitHub repositories for available integrations, as compatibility depends on your specific firmware version and the integration layer you choose to implement.
How many relays can I switch simultaneously without damaging the board?
The HLK SW16 can switch all 16 channels simultaneously without hardware damage. However, the total current draw from the 12V power supply must not exceed its rated capacity. If you're switching many high-current loads at once, ensure your power supply can deliver sufficient current. A 2A supply is adequate for control circuits, but if you're powering solenoids or other inductive loads from the same supply, use a separate power source for the loads to prevent voltage sag affecting the relay control circuits.
Can I use the HLK SW16 for DC motor control?
The HLK SW16 relays can switch DC motors up to 30V/10A (300W). For larger motors, use the relay outputs to control motor contactors or motor starters. For variable speed control, the relays can switch PWM circuits or DC chopper modules. The relay contacts are suitable for DC switching, but ensure you include a freewheeling diode across inductive loads like motor coils to protect the relay contacts from arcing caused by back-EMF when the relay opens.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
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- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy HLK SW16 16 Channel WiFi Controlled Relay Board Online in India
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