EM730 series inverter debugging lesson three
The EM730 series inverter is a high-reliability, small-sized general-purpose inverter launched by Sine Electric: EM730 supports three-phase AC asynchronous machines, EM730 permanent magnet non-standard supports permanent magnet synchronous motors; supports a variety of drive control technologies: vector VF control technology ( VVF) and speed sensorless vector control technology (SVC); supports two output forms of speed and torque, supports Wi-Fi access function and background software debugging function.
01 Introduction to the composition of control loop terminals
Control circuit terminal arrangement:
Composition introduction:
| Category | Terminal Label | Terminal Name |
| Power | 24V | External Power Supply |
| COM | Power Ground | |
| Analog Input | +10V | Analog Terminal Power Supply |
| GND | Analog Power Ground | |
| AI1 | Analog Voltage Input | |
| AI2 | Analog Current/Voltage Input | |
| Analog Output | M1 | Analog Voltage/Current Output |
| Digital Input | X1 | Multi-Function Input Terminal |
| X2 | ||
| X3 | ||
| X4 | ||
| X5 | ||
| Multifunctional Digital Output | Y1 | Open Collector Output Terminal |
| YCM | Y terminal Common End | |
| Communication | A+ | RS485 Communication Interface Terminal |
| A- | ||
| Relay Output | EA | Relay Output Terminal |
| EB | ||
| EC | ||
| External Keyboard Port | RJ45 | External Keyboard Terminal |
Composition introduction:
https://www.youtube.com/watch?v=4PzAZ_RDu8Q&list=PLsAYomntDCCCcGDedJ9mAoyVf0Jw65nV3&index=6
02 Introduction to control loop terminal functions
Features:
| Terminal Label | Function Description |
| 24V | Provide 24V power to the outside, maximum output current 100mA |
| COM | Power ground for external device power supply, digital input terminal common terminal |
| ‘+10V | Provide 10V power to the outside, Maximum output current: 10.5±0.5V/20mA Generally used as working power supply for external potentiometers |
| GND | Common terminal of analog input and output |
| AI1 | ’-10V to 10V, input impedance 50kΩ Bipolar analog voltage input |
| AI2 | Can be configured as current type or voltage type, input range 0/4 to 20mA or 0 to 10V |
| M1 | 0 to 10V/0 to 20mA, output accuracy is ±2% |
| X1 | Program the corresponding terminals through function code settings |
| X2 | Realize input control of setting function; |
| X3 | The input terminal supports PNP and NPN input modes. The factory configuration is NPN input mode. |
| X4 | X5 can also be used as a high-frequency pulse input |
| X5 | The input frequency is up to 100kHz; |
| Y1 | Programmatically defined outputs for multiple functions |
| YCM | The Y terminal common terminal YCM is independent of the digital input common terminal COM. |
| A+ | RS485 differential signal positive terminal |
| A- | RS485 differential signal negative terminal |
| EA | EA-EC: Normally open EB-EC: Normally closed |
| EB | |
| EC | |
| RJ45 | For external operation panel; You can also connect to the host computer through this port for background software debugging; |
Video demonstration:
https://www.youtube.com/watch?v=BBtRg20XZ8M&list=PLsAYomntDCCCcGDedJ9mAoyVf0Jw65nV3&index=5
Control loop wire and screw dimensions
01 In order to reduce the interference and attenuation of the control signal, the connection length of the control signal should be limited to less than 50m, and the distance from the power line should be greater than 30cm. Please use twisted-pair shielded cables when inputting analog signals from the outside.
02 It is recommended to use wires with a wire diameter of 0.5~1 mm² for the control loop wires.
03 The EM730 series inverter terminal board is a through-type control loop terminal. Please use a PH0 Phillips screwdriver for installation. The tightening torque is 0.5N.m.
Control loop wiring precautions
01 Separate the control loop connecting wires from other wires and route them independently.
02 Please separate the wiring of control loop terminals EA, EB, EC, and Y1 from other control loop terminals.
03 In order to avoid malfunction caused by interference, the control loop connecting wire should be twisted shielded wire, and the wiring distance should be less than 50m.
04 To prevent the shielding net from coming into contact with other signal lines and equipment shells, the exposed shielding net can be sealed with insulating tape.
05 It is prohibited to touch the ports and components of the control panel without taking any electrostatic protection measures.
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