9
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:
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.
Control system digital input
Relay external control output
Display board
RS485
