Features Patch Optical Puppet Isolates: The 1 Channel relay module is isolated by a patch optoelectric puppet, which has strong control capabilities and stable performance. High -Stability Performance: The relay module has a design of tolerated failure. Even if the control line is disconnected, the relay will not move, the power indicator (green), and the 4 -way relay status indicator (red). Trigger Through The Jump Line: Each path of the 5V/12V/24V relay module can trigger a high or low level trigger through the jumper settings. Easy to Install: All interfaces of the relay module can be connected directly through the terminal wire, which is very convenient, providing four fixed bolt holes. 5V, 12V, 24V: 1 Trigger current of the relay module is 5mA, and the working voltage of the module is 5V, 12V, and 24V. It can be selected according to the needs. Specification: Weight: 18g/0.6oz Common interface load: AC 250V/10A, DC 30V/10A Module Size (L*W*H): 50*26*18.5mm/2*1*0.7inch Bolt Hole: 3.1 mm; 44.5*20.5mm (spacing) Voltage: 5V, 12V, 24V (Optional) Module interface: 1. DC + : connected to the positive pole of power supply (voltage is required for relay, 5V, 12V and 24V for choice) 2. DC- : connect to the power negative pole. 3. IN: high or low level control relay suction  Relay output terminal:  1. NO: relay changeover interface,relay suction front suspension, suction and COM short connection.  2.COM: Relay common interface. 3.NC: Relay normally closed interface,relay suction and COM short joint, suction clearance.  High and low level trigger selection terminal: 1. When jumper is connected with LOW short circuit, it is triggered by LOW level; 2. High level is triggered when jumper is connected with high short circuit; Package List: 1 x Relay Module Package List