KNACRO DC 12V SLA-12VDC-SL-C DC 12V/AC 250V 30A dual relay module 30A two-way 2-way relay module optocoupler isolation

1, The module uses high-quality relay, normally open interface Maximum load: AC 250V / 30A, DC 30V / 30A; 2, The use of high-quality ultra-small Bidirectional isolation optocoupler, stable performance; trigger current only 3mA; 3, The module operating voltage 5V, 12V, 24V to choose from; 4, The user can select the relay control level, can be high level pull, it can be low level pull; module with current limiting resistor, you can directly use the power supply positive and negative control, you can also use the microcontroller I / O port control; 5, Fault-tolerant design, even if the control line is broken, the relay will not move; 6, Power indicator (red), 2-Channel relay status indicator (blue) 7, All interfaces can be directly connected through the terminal leads, very convenient 8, Module size: 6.0cm * 5.7cm * 2.5cm (L * W * H) (weight 70g) 9, With four fixed bolt holes, easy to install Module interface Module control side: 5-wire interface, all interfaces have terminals, user-friendly wiring 1, DC +: external DC power supply positive (5V, 12V and 24V modules to choose from) 2, DC-: external DC power supply negative 3, VREF: photoelectric isolation control terminal reference ground, -If high-level control is used: This signal should be connected to the negative terminal of the user's control panel power supply -If low level control is used: This signal should be connected to the positive terminal of the user's control panel power supply CH1: relay control interface, -If VREF is connected to the power supply negative: This port is high (relative to VREF) when the corresponding relay pulls -If VREF is connected to the power supply positive: This port is low (relative to VREF) when the corresponding relay pulls