Opis

Relejni modul 4 releji I2C XL9535 5V

Razširite število relejev preko I2C vodila

This 4-channel I2C relay module, featuring the XL9535 I/O expander chip, allows control of four independent relays using only two I2C communication wires (SDA/SCL), thereby conserving microcontroller I/O pins. Each channel includes optical isolation to protect the microcontroller from high-voltage surges and electrical noise, particularly when controlling inductive loads. The module supports unique I2C addressing (A0, A1, A2 pins) allowing up to 8 modules (32 relays) to be daisy-chained on the same bus.

It is compatible with 3.3V and 5V logic controllers like Arduino, ESP32, ESP8266, and Raspberry Pi. Built-in pull-up resistors simplify I2C communication. Use cases include multi-zone irrigation systems, comprehensive room lighting control, automated heating systems with multiple valves, and complex Home Assistant nodes..

Ključne lastnosti

• Združljivost z Arduino, ESP32 in drugimi krmilniki
• Napredna komunikacija (I2C)
• Vgrajena zaščita in galvanska ločitev

Tehnične specifikacije

Inženirski “PRO” nasvet

When using the four-channel version, the current consumption when all relays are switched on is significant (around 300-400mA). If the microcontroller crashes when all four channels are activated simultaneously, it indicates a power overload. In such cases, it is essential to use an external 5V/2A power supply via the USB-C input and ensure a common ground (GND) if separate power sources are used.

Primeri uporabe

• Pametni dom in IoT avtomatizacija
• Daljinsko upravljanje naprav preko telefona
• Razširitev I/O pinov pri kompleksnih projektih