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: 18g/0.6oz_x000D_Common interface load: AC 250V/10A, DC 30V/10A_x000D_Module Size (L*W*H): 50*26*18.5mm/2*1*0.7inch_x000D_Bolt Hole: 3.1 mm; 44.5*20.5mm (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. IN: high or low level control relay suction _x000D__x000D_Relay output terminal: _x000D_1. NO: relay changeover interface,relay suction front suspension, suction and COM short connection. _x000D_2.COM: Relay common interface._x000D_3.NC: Relay normally closed interface,relay suction and COM short joint, suction clearance. _x000D__x000D_High and low level trigger selection terminal:_x000D_1. When jumper is connected with LOW short circuit, it is triggered by LOW level;_x000D_2. High level is triggered when jumper is connected with high short circuit;_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).