8 Channel Relay Module

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5V 8-Channel Relay Module with Optocoupler Isolation (High/Low Level Trigger) This 5V 8-channel relay module features SMD optocoupler isolation for stable performance and reliable signal driving. Each channel supports selectable high or low level triggering via jumper settings, providing flexible control options for different control systems. A fault-tolerant design ensures the relay will not operate if the control signal line is disconnected. Key Features 8-channel relay control with independent high or low level trigger selection per channel SMD optocoupler isolation for improved stability and driving capability Trigger current: 5mA Fault-tolerant design prevents unintended relay activation if the control line is broken LED indicators: Green power indicator Red relay status indicators for each channel User-friendly terminal interfaces for direct wiring connection Relay Specifications Parameter Specification Relay type Normally open / normally closed Maximum load (AC) 250V / 10A Maximum load (DC) 30V / 10A Operating voltage 5V Module Specifications Item Details Module size 141.5mm × 50mm × 18.5mm (L × W × H) Mounting holes 4 holes, 3.1mm diameter Mounting hole pitch 136mm × 44.5mm Interface Description Power Input DC+: 5V positive power supply DC−: Negative power connection Control Inputs IN1–IN8: Control inputs for each relay channel, configurable as high or low trigger via jumper Relay Outputs (24-pin terminal) NO1–NO8: Normally Open contacts COM1–COM8: Common contacts NC1–NC8: Normally Closed contacts High / Low Trigger Selection S1–S8 jumpers correspond to relay channels 1–8 Short COM to LOW: Low-level trigger Short COM to HIGH: High-level trigger Package Includes 1 × 5V 8-Channel Relay Module with Optocoupler Isolation Show more