DCP and DCQ pumps are different, not only controllers are different.
DCA from Coral Box are DCS pumps with special advanced controller. (Also, DCA4000, DCA6000, DCA9000 and DCA12000 include external 0-10v control, no need of AQLlink for Apex and Profilux). Controller also include a level sensor for overflow OR water shortage alarm/shutdown.
DC: electronic inside pump, 3 pin cable = GND VCC and 0-5V speed
DCT/DCS/DCA/DCP/DCW/DCQ: electronic only in controller, 3 pin cable = 3 phase Brushless DC Motor
DCT, DCS and DCQ controllers cost less because they drive motor with a square electric waves.
DCP, DCW and DCA controllers cost more because they drive motor with a sine electric waves.
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