S4A-2CH-H 2-Channel Tuya Wi-Fi & 433MHz RF Relay Switch with Housing
S4A-2CH-H, 2-CH, AC/DC 7-32V, 2x 10A Relays, 433MHz RF + Tuya Wi-Fi, Interlock Mode, Enclosed Casing
The S4A-2CH-H is a 2-channel smart Wi-Fi relay module with 433MHz RF remote support, AC/DC 7-32V input, dual 10A dry contacts, interlock mode, and protective housing for forward/reverse motor and gate control.
Product Overview
Providing independent or interlocked two-channel control, the S4A-2CH-H is ideal for bidirectional motor actuators, motorized curtains, dual-gate access points, and multi-light circuits. It features native Tuya Wi-Fi plus an onboard 433MHz receiver, allowing simultaneous operation via smartphone app and handheld RF remotes.
Why Buy This Product
Hardware Interlock Protection
Ensures only one relay activates at a time, preventing motor short-circuits during directional changes.
RF Remote + Wi-Fi Hybrid
Allows instant local activation with standard 433MHz key fobs alongside worldwide app access.
Multi-Device Automation
Control dual gates, motorized blinds, or separate access doors from a single unified module.
Best for These Applications
Motorized Roller Shutters & Gates
Ideal for open/close bidirectional motors requiring mutually exclusive forward/reverse wiring.
Dual Gate / Barrier Systems
Operates vehicle entrance and pedestrian exit gates independently or synchronously.
Key Advantages
- Interlock Mode for Actuators:When channel 1 turns on, channel 2 automatically switches off, guarding bidirectional motors.
- Dual-Band Connectivity:Works offline via 433MHz RF handheld clickers even if internet connectivity drops.
Frequently Asked Questions
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Weight | 0.11 |
| Shipping Weight | 0.16 |
| Channels Count | 2 |
| Switch Type | relay-module |
| Relay Contact Type | Dry Contact (Passive Form C NO/COM/NC) |
| Mounting Type | Surface Screw Mount |
| Input Voltage | AC/DC 7-32V |
| Power Supply Options | DC Terminal Blocks (7-32V), Micro-USB 5V |
| Max Load Current | 10A per channel (16A Total) |
| Max Load Power | 2200W per channel |
| Relay Cycle Lifespan | ≥ 1,000,000 operations |
| Working Modes | Inching / Jog, Self-Locking, Interlocking (Motor Protection) |
| Interlock Mode Support | Yes |
| Wireless Protocols | Wi-Fi 2.4GHz, RF 433MHz |
| Rf Remote Supported | Yes |
| Rf Remote Capacity | 14 |
| App Support | Tuya Smart, Smart Life |
| Voice Assistant Compatibility | Amazon Alexa, Google Assistant |
| Timing Functions | Countdown Timer, Scheduled Timer, Circulate Timer |
| Housing Material | Flame-Retardant ABS V0 |
| Dimensions | 116 x 38 x 25 mm |
| Operating Temp | -20°C to 70°C |
| Operating Humidity | 5% to 90% RH |
| Stock | 2 |
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