Operation manual of solar controller SR1568
Page 11 of 87
R4～R5: When it is for control 3 ways electromagnetic valve,（3 is normally close port, 2 is
normally on port ,1 is common port）
When it is for control pump, (2 is normally on port, 1 is common port)
Connection with high efficiency pump
Connecting the signal wire from the high-efficiency pump
Signal wire 1 from the high-efficiency pump is connected to GND port of controller
Signal wire 2 from the high-efficiency pump is connected to PWM1 port of controller
Signal wire 3 from the high-efficiency pump is connected to FB1 port of controller or not
connected
Note: High-efficiency pump with 0-10V signal only has 2 signal wires, connected to
the corresponding port GND, PWM1 of controller.
3.4 TF (MicroSD) Card
Controller is equipped with a slot for TF (Micro SD) card. With TF (MicroSD) card, following
functions can be carried out:
Save the measurement and balance values onto the MicroSD card. After transferring
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