Features:_x000D__x000D_Adopt patch photocoupler isolation, strong driving ability, stable performance. Trigger current is 5mA. _x000D_Module operating voltage is 5V,12V,24V for choice. _x000D_Each path of the module can be triggered by the high level or low level through a jumper setting. _x000D_Fault-tolerant design,even if the control line breaks,the relay will not move. _x000D_Power indicator light (green), 4-way relay state indicator light (red). _x000D_Humanized interface design, all interfaces can be directly connected through the terminal lead, very convenient. _x000D_Four fixing bolt holes are provided. _x000D__x000D_Specification:_x000D_Weight: 60g/2.1oz_x000D_Common interface load: AC 250V/10A, DC 30V/10A_x000D_Module Size (L*W*H): 73*50*18.5mm/2.9*2*0.7inch_x000D_Bolt Hole: 3.1 mm; 67*44.5mm (spacing)_x000D_Voltage: 5V, 12V, 24V (Optional)_x000D__x000D_Module interface:_x000D_1. DC + : connected to the positive pole of power supply (voltage is required for relay, 5V, 12V and 24V for choice)_x000D_2. DC- : connect to the power negative pole._x000D_3. IN1-IN4: according to the setting of each circuit, the corresponding relay can be controlled with high or low level to suck in._x000D__x000D_Relay output terminal: with 12 lines of interfaces, all interfaces can be directly connected to lead, convenient for users to use_x000D_1. NO1--NO4: the relay normally opens the interface, and the relay is suspended before it is sucked in, and is connected with COM after it is sucked in._x000D_2. Common interface of relay COM1--COM4._x000D_3. NC1--NC4: relay normally closed interface. The relay is short connected with COM before it is sucked in and suspended after it is sucked in._x000D__x000D_High and low level trigger selection terminal:_x000D_1. S1-S4 is the high-low level trigger selection of relay 1-4 channels successively;_x000D_2. Com and low short connection, the corresponding relay for low level trigger, com and high short connection for high level trigger._x000D__x000D_Package List:_x000D_1 x Relay Module 1Adopt patch photocoupler isolation, strong driving ability, stable performance. Trigger current is 5mA. 2Module operating voltage is 5V,12V,24V for choice. 3Each path of the module can be triggered by the high level or low level through a jumper setting. 4Fault-tolerant design,even if the control line breaks,the relay will not move. 5Power indicator light (green), 4-way relay state indicator light (red).