Features: Uses patch optocoupler isolation, strong drive capability, stable performance. Trigger current is 5mA. Module operating voltage is 5V, 12V, 24V for selection. Each channel of the module can be triggered by high or low level through a jumper setting. Fault-tolerant design, even if the control line breaks, the relay will not operate. Power indicator light (green), 4-way relay status indicator light (red). Humanized interface design, all interfaces can be connected directly via terminal wiring, very convenient. Four fixing bolt holes are provided. Specification: Weight: 60g/2.1oz Common Interface Load: AC 250V/10A, DC 30V/10A Module Size (L*W*H): 73*50*18.5mm/2.9*2*0.7inch Bolt Holes: 3.1mm; 67*44.5mm (distance) Voltage: 5V, 12V, 24V (Optional) Module Interface: 1. DC+: Connected to the positive pole of the power supply (voltage required for the relay, 5V, 12V, and 24V for selection) 2. DC-: Connect to the negative power pole. 3. IN1-IN4: According to the setting of each circuit, the corresponding relay can be controlled by high or low level to suck in. Relay Output Terminal: With 12 lines of interface, all interfaces can be directly connected to wiring, convenient for users to operate 1. NO1--NO4: Relay normally open interface, and the relay is disconnected before being sucked in and connected to COM after being sucked in. 2. COM1--COM4: Relay common interface. 3. NC1--NC4: Relay normally closed interface. The relay is short-circuited with COM before being sucked in and disconnected after being sucked in. High and Low Level Trigger Selection Terminal: 1. S1-S4 are the high-low level trigger selections for relay 1-4 channels respectively; 2. Com and low short connection, the corresponding relay for low level trigger, com and high short connection for high level trigger. Package List: 1 x Relay Module.