Ticfox 5V 8-Way 20A Relay Control Module Relay Control Board Support High and Low Voltage Trigger

Features The interface design is humanized, all interfaces can be directly connected through the terminal block, which is very convenient.there are 4 fixing bolt holes for easy installation; The module uses real relays, AC 125V/20A, DC 14V/20A.Fault-tolerant design, even if the control line is broken, the relay will not act; The user can select the control level of the relay, which can be high-level pull-in or low-level pull-in; the module contains a current-limiting resistor, which can be directly controlled by the positive and negative poles of the power supply, or the I /O port control of the MCU control; The working voltage of the module is 5V; there are 1 way, 2 way, 4 way, 8 way, 16 way module to choose from; Using the industry's top quality ultra-small two-way isolation optocoupler, strong anti-interference ability and stable performance,Relay status indicator (red). Module interface: Module input control terminal 1. DC+: External DC power supply positive 2. DC-: External DC power supply negative 3. VREF: Reference ground wire of photoelectric isolation control terminal If high level control is adopted: this signal should be connected to the negative pole of the power supply of the user control board If low level control is used: this signal should be connected to the positive pole of the user control board power supply 4. CH-CH: Relay control interface, If VREF is connected to the negative pole of the power supply: this port is at high level (relative to VREF), the corresponding relay is closed If VREF is connected to the positive pole of the power supply: when this port is at high level (relative to VREF), the corresponding relay is closed Pay attention: the isolated relay module is to adapt to the severe electromagnetic environment or high signal requirements. If you want to achieve a complete isolation effect, the power supply of the user control panel (that is, the reference power supply connected to the VERF) and the power supply of the relay module (DC+/DC-) should be distinguished. If the two power supplies share the same ground, it is not a complete isolation effect. Specification: Size: as shown Voltage: 5V Packing list: 1 x 5V 8-Way 20A Relay Control Module Package List 1 x Receiver 1 x Antenna 1 x Receive Antenna 1 x Data Cable