First, an overview 
 PK-3D-J-type three-phase switch modules, I launched the PK-3C-J module on the basis of dedicated research and development of a whole new generation of three-phase switch electric actuator control module. Receiving long-pulse or short pulse signal from the DCS and other systems or PLC controller, the control of the electric actuator to open or close the valve, can be implemented on the control of any point of the whole trip. Can also be a two-wire control: a letter open valve, the letter off valve; 2 letter off valve, no letter to open the valve. The product set of the phase sequence automatically adjust valve position transmitter, isolation amplifier, power driver and many other features and integration, with the lack of protection, over-torque protection, the protection of electronic interlocking, forbidden to move to delay protection, temperature protection, complete protection function. Site control panels can be added with the implementation of site operations and provide a variety of alarm output; increase with the valve-bit LCD display, accurate visual indication of valve position opening; plus with infrared remote control function to achieve the higher classes of site operations. The product has a strong anti-interference ability, reliable performance, seismic, moisture, small size, simple wiring, commissioning, etc.. Has been widely used in the DKJ, the DKZ the DZW, LQA, QB, QT, SD, SM, SMC, SR, 2SA, 802,903,3410,3610 and other products. 
 Second, the main technical characteristics and performance parameters 
 A power supply voltage: 380V ± 10%, 50HZ ± 5% (special requirements can be when ordering). 
 2, the power wiring: three-phase three-wire, three-phase four-wire system. 
 3 can automatically recognize, adjust the three-phase power, phase sequence, the correct implementation of the valve open and closing control. 
 4, with a lack of protection, over-torque protection, electronic interlock protection, ban fixed delay protection, temperature protection and other protection features. 
 5 can be equipped with: site control panels, valves LCD screen, infrared remote control and other functions. 
 6, with power, phase failure, torque and other alarm output contacts and remote / live status indication. 
 7, the input / output signal channel optical isolation (withstand 2000V surge voltage). 
 8, the input control signal: passive dry contact, active DC24V or AC24V, active AC220V. 
 9, the output feedback signal: DC4 ~ 20mA (active output), DC1 ~ 5V, DC0 ~ 10V (can be either). 
 10, the output impedance: ≦ 750Ω. 
 11, the valve position potentiometer resistance: 1KΩ ~ 5 KΩ (if with other resistance potentiometer, please contact us). 
 12, the output valve position current adjustment range: low-end 0% -85%, the low-end without the need to zero; high-end 15% to 100%, that is when the lap valves bit potentiometer angle is small (0 to 45 °) corner of the largest (0 ~ 270 ° or 0 ~ 330 °) are adjustable DC4 ~ 20mA current. 
 13, the feedback current regulation technology just the valve open, off time, you can accurately align the DC4 ~ 20mA current, without the traditional way repeated adjustment. 
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 14, the conventional control can be set via DIP switches on the module and the two-wire control. Conventional control, namely: 

 Receiving the control signals for long pulse or short pulse, the middle of any to stop. The two-wire control, namely: 
 Control signal by the two signal lines. Can be a letter to open the gateway; or gateway, no letter opened two control modes, the half-way non-stop to. 
 15, applied to reversible control, connected to a sustained rate of 50% per hour connected to the number of ≦ 600. 
 16, Operating Temperature: -30 ℃ ~ +70 ° C (special temperature requirements, please call the contact). 
 17, the ambient humidity: ≦ 95% (25 ° C)