2PCS KLR 1 Channel Relay Module 30A Large Power Isolated High/Low Trigger Bidirection Optocoupler 5/12/24V Power

2PCS KLR 1 Channel Relay Module 30A Large Power Isolated High/Low Trigger Bidirection Optocoupler 5/12/24V Power

Description:
- The module uses genuine quality relay , normally open interfaces Maximum load : AC 250V/30A, DC 30V/30A;
- Using the industry's top -quality ultra-compact two-way isolation optocouplers, anti-interference ability , stable performance ; trigger current is only 3mA;
- The module voltage is 5V, 12V, 24V are available ;
- User-selectable relay control level can be high pull, pull can also be low ; module containing limiting resistor can be used directly to control the power of positive and negative , can also use the MCU I / O port control ;
- Fault-tolerant design , even if the control line is broken , the relay will not operate ;
- The power indicator ( red ) , 1 relay status indicator ( blue )
- Interface design humane, all interfaces can be connected directly via terminal wiring leads , very convenient
- Module size : 3.0cm * 6.0m * 2.0cm ( L * W * H )
- With 4 fixing bolt holes for easy installation

Two module interface
- Module control terminal : 4 -wire interface , all interfaces are terminal, user terminal
     DC +: negative external DC power supply (with 5V, 12V and 24V modules to choose from )
     DC-: negative external DC power supply
     VREF: optically isolated ground reference control terminal ,
       If a high-level control : This signal should be connected to the negative power of the user control panel
       If using low-level control : This signal should be connected to the positive supply user control panel
    CH1: relay control interface,
        If VREF negative one : This port high ( relative to VREF) when the corresponding relay
        If VREF positive power supply : When this port is low ( relative to VREF) corresponding relay

- Note : Isolated relay module is designed to adapt to the environment is bad or electromagnetic signals high demand for the occasion , if you want to achieve complete isolation , the user control panel power ( ie connection VERF reference power ) power supply and relay module (DC + / DC-) to be distinguished , if both of the power ground , the effect was not completely isolated , then the user can choose a more economical in our standard relay module .

- Relay outputs : 3 -wire interface , all interfaces are terminal, user terminal
     NO: normally open relay interface, the relay before the vacant after the pull shorted with COM
     COM: Common Interface Relays
     NC: normally closed relay interface relay shorted with COM ago , after the pull- vacant