Enhance your electronic control projects with this reliable 4-Channel Relay Module featuring patch photocoupler isolation for strong driving capability and stable performance. Designed for versatile use, this module supports operating voltages of 5V, 12V, and 24V, with flexible trigger options for each channel through jumper settings, allowing activation via high-level or low-level signals. Its fault-tolerant design ensures that even if the control line breaks, the relay remains in its last state, providing added safety and stability. Key Features: · Patch Photocoupler Isolation: Provides strong driving ability and stable electrical isolation to protect sensitive circuits. · Flexible Operating Voltage: Compatible with 5V, 12V, and 24V systems to meet diverse application requirements. · Adjustable Trigger Modes: Each channel can be set to trigger on high level or low level using easy jumper settings for maximum control flexibility. · Fault-Tolerant Design: Ensures relay maintains its position even if the control line is disconnected, preventing unwanted switching. · Visual Indicators: Equipped with a green power indicator and four red relay status LEDs for clear operational feedback. · User-Friendly Interface: All connections are accessible via terminal leads for straightforward integration and wiring convenience. · Secure Mounting: Includes four fixing bolt holes for stable installation in various environments. Specifications: · Weight: 18g (0.6oz) · Module Dimensions (L×W×H): 50×26×18.5mm (2×1×0.7 inches) · Bolt Hole Diameter: 3.1mm; Bolt Hole Spacing: 44.5×20.5mm Module Interface Details: · DC-: Connect to power negative pole · IN: Control input allowing high or low level relay activation Relay Output Terminals: · NO (Normally Open): Relay changeover contact, open when de-energized, closed when energized · COM (Common): Common terminal for the relay contacts · NC (Normally Closed): Relay contact closed when de-energized, open when energized Trigger Selection: · LOW Level Trigger: Connect jumper to LOW (short circuit) position · HIGH Level Trigger: Connect jumper to HIGH (short circuit) position Package Includes: · 1 x 4-Channel Relay Module This 4-Channel Relay Module is perfect for DIY electronics, automation projects, and control systems requiring reliable relay switching with multiple voltage options and customizable trigger settings. Its durable design and intuitive interface make it an essential component for hobbyists and professionals seeking efficient relay control solutions.