VFD300A high performance vector control frequency inverter user manual Chapter 7 Selection guide of inverter Accessory- 99-PT100 temperature detectioninput.TMPAI4NORPT0PT1PT1000 temperaturedetection input.TMPAI4NORPT0PT112 DO3 Open collector output 3Voltage range:0~24V13 DO4 Open collector output 414 DO5 Open collector output 515 DO6 Open collector output 617 PLCDigital input power supplying terminalIt is used for switching between high and low levelof switch input. It is short-circuited with +24V infactoty default, that is, DI is active at low level.When using external power, disconnect the PLCfrom the +24V.Different from the PLC on the IO board, it should beused independently18 +24VProvides +24V power supply to the outside, it isgenerally used as digital input and output terminalworking power supply and external sensor powersupply