The main technical parameterss
Intelligent proportional servo circuit PSAP4 PS electric actuator package, using SMT technology, has the advantages of small volume, high reliability. The circuit will control the electric actuator 4-20mA current signal, and the actuator current position signal For comparison, and according to the deviation, the control actuator on or off the action, so that the actuator position and input signal balance.
PSAP4 in the realization of actuator with the movement of the input 4-20mA signals at the same time, also provides the 4-20mA position signal and a group of power supply, the input signal is separated into the system.
PSAP4 can easily adjust the actuator to the starting position and stroke; can conveniently realize the positive / reverse switching; set when the input signal failure actuator hold state is open, fully closed or.
work The principle of
position signal transform circuit will reflect changes in the actuator position 1000 euro three wire line resistance signal is in the 4-20mA. The control input and the position signal is simultaneously sent to the error amplifier compares, the solid state switch, the executive mechanism is opened or closed control. According to the requirement to adjust the sensitivity control, can change the tracking accuracy and eliminate oscillations due to mechanical inertia may produce.
technology parameter
additional travel (2WE) and the additional torque (2DE) switch
additional travel (2WE) and the additional torque (2DE) switch is a set of 2 additional switch, can meet when the actuator to the appropriate location or torque output of 2 passive contact signal (220VAC 5A).
single / double valve position feedback potentiometer (POT/POT2)
output 1 group (POT) or 2 (POT2) with valve position values corresponding to 0 to 1000 Ω resistor signal, as a servo amplifier valve position feedback signal input or transferred to the instrument as a valve position display.
heating resistor (HR)
installed in the inside of actuator, the actuator is to maintain a certain temperature, in order to avoid the low temperature (-20 ℃) when using frosting, and damage the actuator electrical components.
independent position transmitter PSMF
when no with built-in servo amplifier, and only need to output the 4-20mA valve position signal when the selected
other optional application component
electrical wiring
The switch mode
Input: the motor forward, reverse phase: and the midline; output: 4-20mA feedback signal; open the cabinet can be seen (Figure sketch, actuator housing with a terminal for electric wiring, selection of appropriate and power line For mechanism is connected, recommend the use of a 1 (mm) wire)
Adjust the action mode of
Input: 4~20mA, 1~5V: 4-20mA; output feedback signal; open the cabinet can be seen (Figure sketch, actuator housing with a terminal for electric connection, select the appropriate Power line is connected with the actuator, recommend the use of a 1 (mm) wire
PSL linear actuators is mainly composed of isolated electric control part and a gear driving part. Motor as an intermediate member connects the two insulating part, motor according to the requirement of output torque control, transfer to the trapezoid screw rod through a multi polar spur gear, a screw rod by screw torque thrust rod transformation. This rod thread self-locking, and the straight line travel with the adaptor transfer to the stem. Actuator output shaft with a rotation preventing rotation stop pin, a shaft locking device can be As a position indicator. The locking device is connected with a connecting rod, connecting rod with the output axis synchronous operation, the output shaft displacement is converted to electrical signals through the circuit board is connected with the connecting rod, provide to the servo amplifier as a comparison signal and valve position feedback output, while the actuator travel can also be composed of two main switch board switch limit, and consists of two mechanical limit block to adjust the limit position.
