2PCS/Lot KLR 2 Channel Relay Module Isolated High or Low Trigger Relay 5/12/24V Power

2PCS/Lot KLR 2 Channel Relay Module Isolated High or Low Trigger Relay 5/12/24V Power

Description:
- The module uses genuine quality relay , normally open interfaces Maximum load : AC 250V/10A, DC 30V/10A;
- 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 ; otherwise one -way , 2-way , 4-way , 8-way modules to choose from ;
- 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 ) , 2-way relay status indicator ( blue )
- Interface design humane, all interfaces can be connected directly via terminal wiring leads , very convenient
- Module size : 5.0cm * 4.8m * 2.0cm ( L * W * H )
- With 4 fixing bolt holes for easy installation

Two module interface
- Module control terminal : 5 -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-CH2: 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 : 6 -wire interface , all interfaces are terminal, user terminal
    NO1 - NO2: normally open relay interfaces , relay before the vacant after the pull shorted with COM
    COM1 - COM2: Relay Common Interface
    NC1 - NC2: normally closed relay interface relay shorted with COM ago , after the pull- vacant