Straight stroke electric actuator used to drive single, two-seat valve, sleeve valve, high temperature and pressure, water supply, less warm water and other needs linear displacement control valve.
I. Product Overview
(A) it is an intelligent control system.
SD Series Intelligent Motor implementing agencies, under the premise of full E took the advanced technology of similar products at home and abroad, according to China's industrial control system characteristics, use of modern microcontroller technology to function entirely by the reliability of the PIC-16C711 microcontroller as the core to complete the control various functions by the "software" program.
(B) it is a fully functional control system.
A broken signal protection functions ---- When the input signal is less than 2mA, as a broken signal, at this time the output shaft by the user preset state action. The presets are three types: a, in situ, b, full, and c, fully closed.
2, overcurrent protection ---- When executing agency overcurrent control circuit of the machine automatically shut down, the implementing agency remains in situ, in order to protect the executive body and the valve.
3, the dynamic electric brake - when the motor running to a given value = feedback value, due to the operation of inertia idler go make the output shaft oscillation. A dynamic electric braking command is issued by the "software" program (ie, given an instantaneous reverse current) so that the sweep line to stop immediately, no idler walk oscillation, which greatly improved the reliability of the automatic control system and stability.
4, upper limit and lower limit functions - according to site needs, rotary in the range of 90 degrees, based within the scope of the rated travel, and lower limits at both ends limit arbitrarily adjustable, adjustable range of about 40%. Factory, the lower limit is set to 4mA, the upper limit set to 20mA.
(C) it is a high reliability and stability control system.
The choice of PIC MCU and its powerful, high reliability. It combines the central controller, RAM, ROM, and the I / O port in one. Due to the elimination of the external lead, interference effects may be almost zero. Willing to have a compact structure, with fewer components, small size, easy to adjust, low failure rate, high stability compared with the conventional circuit of similar products. Another due to the single-chip single-byte instruction, eliminating the confusion of the opcode and operand, to further improve stability. Otherwise, the program is on the software design increased burnt in ROM and "watchdogs" (this watchdog circuit within the microcontroller to work independently, free from the clock, the circuit affect) virtually eliminating the microcontroller "crash "Therefore, this system is very reliable system. The SD series intelligent electric implementing agencies is the advanced model with the level of the 1990s, the upgrading of products for traditional products.
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