ITEM NAME:3-20V Mosfet MOS Transistor Trigger Switch Driver Board PWM Control Module Z a.imagelink a:hover.imagelink {color:#db3606;.PWM: signal input port (connects MCU IO ports, PLC interface, DC power). Input Signal: 3-20V PWM signal. PWM Frequency: 0-20KHz. GND: signal negative port. OUT+: output port positive (connects device positive).