Feature: 1. This module uses a double-sided printed circuit board, and the layout of the entire module is reasonable and beautiful. 2. Use a high-power relay to control the load, up to 30A. 3. In the 4-channel design, each channel has light coupling isolation, with the strong ability to resist interference. 4. Black 9500 terminal, with large current, convenient for wiring. 5. Each channel is equipped with a relay switch LED indicator light, visible on and off. 6. Isolation slots are designed in both the control area and the loading area. 7. The module takes the premium quality 30A relay, the maximum load of the open interface: AC250V/30A, DC30V/30A. 8. Using patch optocoupler isolation, strong driving ability, and stable performance; ​The trigger current is 5mA. 9. The working voltages of the module are 5V, 12V, and 24V for selection, you can choose according to your needs. 10. The module can be triggered by setting a high level or low level through a jumper. 11. With humanized interface design, all interfaces can be led directly by a wiring terminal, which is very convenient. 12. It can be worked with module racks (not included), standard card rail, and rail mounting more conveniently. 13. Wide applications, suitable for PLC automation equipment control, industrial system control, Internet of things control, home intelligence control, electronic hobbyist development experiments, various circuit modifications, etc.​ Specification: This 4-channel relay module adopts premium quality 30A relay, the maximum load of the open interface: AC250V/30A, DC30V/30A. Using patch optocoupler isolation, strong driving ability, and stable performance; ​The trigger current is 5mA. The working voltages of the module are 5V, 12V, and 24V for selection, you can choose according to your needs. The module can be triggered by setting a high level or low level through a jumper. Wide applications, suitable for PLC automation equipment control, industrial system control, Internet of things control, home intelligence control, electronic hobbyist development experiments, various circuit modifications, etc.​ Features: This module uses a double-sided printed circuit board, and the layout of the entire module is reasonable and beautiful. Use a high-power relay to control the load, up to 30A. In the 4-channel design, each channel has light coupling isolation, with the strong ability to resist interference. Black 9500 terminal, with large current, convenient for wiring. Each channel is equipped with a relay switch LED indicator light, visible on and off. Isolation slots are designed in both the control area and the loading area. The module takes the premium quality 30A relay, the maximum load of the open interface: AC250V/30A, DC30V/30A. Using patch optocoupler isolation, strong driving ability, and stable performance; ​The trigger current is 5mA. The working voltages of the module are 5V, 12V, and 24V for selection, you can choose according to your needs. The module can be triggered by setting a high level or low level through a jumper. With humanized interface design, all interfaces can be led directly by a wiring terminal, which is very convenient. It can be worked with module racks (not included), standard card rail, and rail mounting more conveniently. ​Wide applications, suitable for PLC automation equipment control, industrial system control, Internet of things control, home intelligence control, electronic hobbyist development experiments, various circuit modifications, etc.​ Specifications: Name: Relay Module Material: plastics Voltage: 5.0V, 12.0V, 24.0V (optional) Static current: 5mA Limit working current: 190mA/80mA/50mA Triggered: Low level trigger; High level trigger; Trigger voltage ranges Refer to the following Load voltage: DC30V or AC250V Load current: 30A Relay lifespan: More than 100,000 times Positioning hole size: 126.5 * 69.5mm / 4.98 * 2.74in Item size: 130 * 72 * 22mm / 5.12 * 2.83 * 0.87in Item weight: 165g / 5.82ounce Package size: 180 * 140 * 30mm / 7.09 * 5.51 * 1.18in Package weight: 170g / 6.00ounce Packing List: 1 * Relay Module Package List: 1 * Relay Module