4 Channel 12V Relay Module Switch Input RS485 TTL Communication for Home Automation

Spec: Item Type: 4-Channel Relay Module Relay Communication: Multi-unit network 485 communication, the default communication address is 1, and the user can modify the address by himself Note: IN1-IN4 are used to connect to the switch and read the switch status through 485, not to control the relay output through the input. The switch status of IN1-IN4 needs to be read by the computer every time it is inquired, and data cannot be sent to 485 actively. Note: IN1-IN4 cannot be connected to 220V (some buyers will make this mistake) The Wiring Method is as Follows: IN1-GND (default is high level, low level after the switch is turned on) The computer sends instructions to read the switch status. IN2-GND (default is high level, low level after the switch is turned on) the computer sends instructions to read the switch status. IN3-GND (default is high level, low level after the switch is turned on) the computer sends instructions to read the switch status. IN4-GND (default is high level, low level after the switch is turned on) the computer sends instructions to read the switch status. Size: Approx. 76 x 67mm / 3 x 2.6in Package List: 1 x 4-Channel Relay Module Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.

• [Easy Installation] Convenient 4-channel 12v relay output board module for hassle- setup
• [Stable Working] Excellent performance at the connecting part ensures
• [Low Power Consumption] Efficient module with , ideal for rs485 / ttl communication
• [Premium Components] Adopted electronic parts for long-lasting performance and accuracy
• [ Material] components ensure stability and durability of the product