S4A-2CH 2-Channel Tuya Wi-Fi & 433MHz RF Relay Board Module
S4A-2CH, 2-CH Bare PCB, AC/DC 7-32V, 2x 10A Relays, 433MHz RF + Tuya Wi-Fi, Interlock Mode
The S4A-2CH is a bare-board 2-channel smart Wi-Fi and 433MHz RF relay module featuring AC/DC 7-32V input, 2x 10A dry contacts, interlock logic, and Tuya Smart app integration for OEM systems.
Product Overview
Providing two independently controlled dry contact outputs on a bare circuit board, the S4A-2CH is the go-to solution for integrating smart automation into multi-motor devices, dual-barrier access lanes, and motorized louvers. Equipped with both Wi-Fi and 433MHz RF receiver, it bridges legacy radio fobs and modern cloud apps effortlessly.
Why Buy This Product
Motor Direction Interlock
Hardware lockout guarantees that forward and reverse contacts are never closed simultaneously.
Remote & App Redundancy
Gate users can press physical RF visor remotes or use their smartphones interchangeably.
Compact Embedded PCB
Easily retrofitted into existing commercial gate controller housings with minimal footprint.
Best for These Applications
Motorized Curtains & Blinds
Perfect for directional open/close blind motors needing mutual interlocking.
Interlocked Mantrap Airlocks
Controls two secure doors in airlock configurations ensuring one door is locked before the other opens.
Key Advantages
- Independent or Interlocked Relays:Toggle between independent two-channel operation and interlocking with a single app setting.
- Built-in RF Learning Receiver:Stores up to 14 distinct RF transmitter buttons with simple push-button pairing.
Frequently Asked Questions
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Weight | 0.07 |
| Shipping Weight | 0.11 |
| 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 |
| 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 |
| Dimensions | 105 x 33 x 20 mm |
| Operating Temp | -20°C to 70°C |
| Operating Humidity | 5% to 90% RH |
| Stock | 3 |
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