2PCS KLR 1 Relay Control Module Expansion Board High/Low Level Trigger Dual Terminal Dual Layer PCB 5/12/24V Power

2PCS KLR 1 Relay Control Module Expansion Board High/Low Level Trigger Dual Terminal Dual Layer PCB 5/12/24V Power

Description:
- Isolated one -way relay control module , using high-level signal is triggered , only 3mA current of 10A to drive the control relay , power relay module uses genuine quality , the industry 's top ultra- small package optocouplers, power high-voltage transistor, red, blue signal lights, military-grade double-sided PCB board, cloth board to consider a comprehensive, stable performance, can be widely used in a variety of power control types of occasions .

A module 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 coupler, strong anti-jamming 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 ;
- high pull relay module containing limiting resistor , can be a high DC +, can also MCU I / O port is set high ;
- 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 : 5.0cm * 2.7m * 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
     VERF: optically isolated control terminal reference ground , this signal should be connected to the negative power of the user control panel
     CH1: relay control interface , high ( relative to VERF) 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 the power of the two , the effect is not completely isolated , then the user can choose a more economical in our non- standard isolation 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