Enhance your automation and control projects with the versatile Relay Shields Module UD74B08, designed for reliable and efficient switching operations. This modular relay features both input and output interfaces, including a USB port compatible with Windows, Linux, and OS X operating systems, providing seamless integration for various platforms. Key Features: · Modular Input and Output Interfaces: Equipped with a USB interface supporting multiple operating systems, enabling easy connectivity and control. · Dual Instruction Sets: Supports AT commands and 8-byte instructions with automatic recognition, eliminating the need for manual switching. The AT command mode allows a maximum delay of up to 9999 seconds for precise timing control. · Expandable Stacking Capability: Supports stacking multiple relay modules to display various patterns and characters, enhancing scalability. Features UART serial port protocol and a USB_B female interface with CH340 serial port chip for versatile communication. · Photoelectric Isolation Input Ports: Includes 8 photoelectric isolation input ports (NPN active low) to ensure signal integrity and noise immunity. The input-output relationship can be configured as associated (default) or independent according to your application needs. · Multiple Working Modes: Offers 8 distinct working modes—open, close, jog, self-lock, interlock, delay, all open, and all close—controlled via 8-byte commands without delay mode, providing flexible operation for diverse scenarios. · Robust Electrical Specifications: Operates at DC 12V with low standby current (11mA) and varying conduction currents depending on the number of active relays, ensuring energy-efficient performance. Supports a maximum load of 10A at 250VAC, 125VAC, 30VDC, 28VDC, and 12VDC, suitable for a wide range of electrical devices and applications. Specifications: · Item Type: Relay Shields Module · Model: UD74B08 · Working Voltage: DC 12V · Working Current: Standby 11mA; Relay conduction ranges from 39mA (1 relay) to 222mA (8 relays) · Maximum Load: 10A/250VAC, 10A/125VAC, 10A/30VDC, 10A/28VDC, 10A/12VDC Package Includes: · 1 x Relay Shields Module UD74B08 This Relay Shields Module UD74B08 is ideal for developers and engineers seeking a reliable, expandable, and highly configurable relay solution. Its comprehensive input/output interfaces, multiple control modes, and robust load capacity make it perfect for automation systems, industrial control, and custom electronic projects requiring precise relay control and protection.