1、 Product Overview

The rapid development of electronic technology and the continuous emergence of new electronic and power components have led to significant leaps in the functionality and performance of control systems. Traditional analog circuit electric actuators can no longer meet the needs of control systems. Novel intelligent digital electric actuators, with their rich functions, excellent performance, and excellent human-machine interface, have been widely used. The mechanical design of intelligent digital electric actuators is basically the same as traditional analog electric actuators, forming an intelligent digital electric actuator that combines servo amplifiers and position transmitters to form a new electronic circuit. It completes input and interface technology, adds unique CPU fault diagnosis, identification, and logic judgment. In terms of performance, it uses software technology to complete adaptive positioning calculation, making positioning errors smaller and control accuracy improved, making up for the shortcomings in mechanical design. The servo motor control adopts zero crossing trigger thyristor power devices, with simple control methods and convenient on-site debugging, improving the reliability of the whole machine operation. Its electrical control characteristics are as follows:

1. The electrical control circuit adopts microprocessor (CPU) hardware and software technology, making on-site debugging extremely simple. It can be manually opened by operating the button locally

Close), enter the debugging menu, run the valve position to the open limit position, confirm, and then close it to the limit position (mechanical positioning upper and lower limits), confirm, the internal microprocessor will automatically recognize these two limit positions and store their values. Valve position signal output (4-20mA), calculated by software, automatically corresponds to the range from the start point to the end point of the actuator, and on-site debugging work can be completed.

2. Improved the motor braking function by removing mechanical friction braking and adjusting the electronic braking time according to different shaft torque outputs.

3. Powerful fault self diagnosis function, during the operation of the whole machine, the microprocessor (CPU) continuously monitors the operating status of the execution mechanism, such as inputting given signals

(Instructions), motor operating torque, power phase, through self diagnosis, various faults, statuses, information are sent out and automatic correction and alarm output are made.

4. The functions of signal interruption fault handling, positive and negative action, braking time, and insensitive area are pre-set through character codes in a question and answer manner

When using the option type, different functional operations (switch type, remote control type, adjustment type) required for the actuator can be achieved on one actuator, simplifying the selection and debugging process and reducing the number of spare parts, saving funds and reducing inventory.

5. The given signal (instruction) is electrically isolated from the valve position output signal to eliminate common mode interference.

6. The servo motor control adopts zero crossing triggering power devices to eliminate power harmonic pollution.

7. Non invasive infrared remote control operation.

8. Working power supply 220vAc

　　2、 Main technical performance

1. Input signal: switch quantity, analog quantity 4-20mA, impedance 100 Ω

2. Position output signal: 4-20mA, impedance ≤ 750 Ω

3. Setting of insensitive zone (dead zone):

0-25 digit setting, minimum value 0.25% (1/4096)

4. Positioning error: set at 0.5~2%, positive and negative effects output, randomly set

5. Damping characteristic (braking time) digital setting, with a range of 0~20, a minimum value of 0, an initial value of 1 is 5ms, and a final value of 20 is 800ms, which can be determined based on

Output shaft knob torque setting.

6. Input signal (command) and output (valve position) electrically isolated medium withstand voltage of 2500V

7. Digital display: resolution of 1%, range of 0-99% corresponding to electrical signal 4-20mA

8. Remote operation: actuator port output: remote control/on-site, on/off operation (passive contacts), contact voltage and current 24VDC 0.5A1, priority can be given to remote control operation of electric actuators in the control room.

9. Signal interruption output (passive contact) can preset the actuator input signal interruption state: fully open, fully closed, at any position or set position

10. Set any value within the range of 45 °~110 ° angle to correspond to 4-20mA

11. Electrical limit setting range: lower limit 0~50%, upper limit 50~100%

12. Working power supply: AC220V ± 10% 50HZ

13. Operating environment: -20 ℃~80 ℃ ≤ 95% RH

14. Implementation and reference standard JB/T8219-1999

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