2 Channel Serial Port Control Relay Module RS232 Opto Relay Board with for MCU SP3232 8bit Comm Chip

Feature: 1. Electrical Control Device: It is an electrical appliance that causes a predetermined step change in the controlled quantity in an electrical output circuit, when the change in the input quantity (excitation) meets the specified requirements. 2. Interactive Function: It has an interactive relationship between the control system (also known as input circuit) and the controlled system (also known as output circuit). 3. Automatic Adjustment: Usually used in automated control circuits, it is a kind of automatic switch that uses a small current to control the operate of a large current. It plays a role in automatic regulation, safety protection, and switching circuits. 4. Comm Chip: RS232 Modbus relay module is equipped with for MCU and RS232 8 bit electrical level Comm chip, which is mature and stable. 5. 2 Channel: Adopting for MODBUS RTU format RS232 Comm protocol, it can realise 2 channel input signal detection and 2 channel relay output, which can be used for digital quantity detection or power control occasions. Specification: Item Type: 2 Channel Relay Module Material: PCB Power Supply Voltage: 5-32V Comm Protocol: Supports for Modbus RTU standard protocol Comm Interface: Supports RS232 interface Comm Baud Rate: 4800/9600/19200, default 9600bps, supports power off saving Output Signal: Relay switch signal Device Address: Range 1-255, default 255, supports power off saving Package List: 1 x 2 Channel Relay Module