12
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24
Functions of control terminal
Category
Terminal
signal
Terminal
name
Terminal function
Remarks
Power
terminal
L1/L,
L2/N
Input terminal
of solar power
Power connecting
solar panels
Pay attention
to the input
and output to
avoid
connection
P+, P-
U/T1,
V/T2,
Output
terminal
of
inverter
Output
connects
motor
E
Earthing
terminal
Earthing
Control
terminal
of input
signal
PR1
Control
terminal
Input
of
optical
sensor
PR2
Control
terminal
Input
of
optical
sensor
OF
Control
terminal
Input of detection
signal of overflow
(drainage)
water
level sensor
LW
Control
terminal
Input of detection
signal
of
supply
water level sensor
COM
Control
terminal
COM is the public
terminal
of
all
control terminals
Reserved
input
terminal
RE1
AU
SP
+24V
Output
signal
terminal
RA
RA and RB
are normally
open contacts
of the relay
Relay outputs
normally open
contacts
RA and RB
are closed
after the
operation of
this Inverter
RB
COM is the public terminal while LW and COM are the terminals for the water
shortage protection interfaces. Both can be connected with the water level monitoring
sensor of the water source. The sensor type can be set by parameters (if it is set as
FHH, the disconnection of the sensor is valid; for the protection when the sensor is
