8. EXTERNAL CONTROL(Not included in standard model)
External control can be enabled via following contacts. Pressing on/off can stop the pump
even if working via an external controller.
a. Digital Input: To enable external speed control, connect one of the digits from Di1/2/3/4 to
COM. See schematic as below:
Control system digital input
b. Relay Output: Connect terminal L & N to enable external control. An additional on-off is
necessary while bearing power< 500W, 2.5A. See schematic as below:
c. RS485: To enable external control pump RPM, connect terminal A and B, via Modbus485
communication protocol.
Display board
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9
Relay external control output
RS485