The User Manual of 580 Series General Frequency Converter

3.2.4 Wiring mode of control loop of frequency converter

Fig. 3-21Control loop wiring mode of frequency converter

Note: All 580 series frequency converters have the same control loop wiring mode. The said figure is a wiring diagram of three-phase 380V frequency converter. Terminal ◎ indicates main loop terminal and Terminal ○ indicates control loop terminal.

1) AI analog input terminal:

The weak analog voltage signal is easily influenced by external factors, therefore, the shield cable is generally required and the wiring distance shall be as short as possible and no more than 20m, as shown in Fig. 3-22. In some situation where the analog signal is severely disturbed, it is required to set an additional filter capacitor or ferrite core in the analog signal source side, as shown in Fig. 3-23.

Fig. 3-22 The wiring diagram of analog input terminal

Fig. 3-23 The wiring diagram of analog input terminal processing

2) DI digital input terminal:

The shield cable is generally required and the wiring distance shall be as short as possible and no more than 20m. When active mode is used for drive, the necessary filtering measures shall be taken for the crosstalk of power supply. It is recommended to use contact control mode.

◆ Leakage-type wiring mode (NPN)

Fig. 3-24 Leakage-type wiring mode

This is the most common wiring mode. If external power supply is used, the short circuit chip between +24V and OP as well as the short circuit chip between COM and CME must be removed, the positive electrode of external power supply is connected to OP and the negative electrode of external power supply is connected to CME.

Note: In this wiring mode, DI terminals of different frequency converters cannot be spliced, or else, DI misoperation may occur; If DI terminals are spliced (Among different frequency converters), the diode (The positive electrode shall be connected to DI) shall be connected in serial at DI terminal and meet the following requirements: IF>10mA, UF<1V, as shown in the following figure.

Fig. 3-25 Leakage-type wiring mode of DI terminals of multiple frequency converters

◆ Active wiring mode (PNP)

Fig. 3-26 Active wiring mode

In this wiring mode, the short circuit chip between +24V and OP must be removed, +24V is connected to the common terminal of external controller and OP shall be connected to COM. If external power supply is used, it is necessary to remove the short circuit chip between CME and COM.