2.4 Solar Controller Wiring SI30 Solar Pump Inverter Manual Standard Wiring DC Power Input P P1 N Contactor Breaker N1 AC/DC Module S AC Power Input R/L ( )+ Solar Pump Inverter U V Output Filter U V M~ T/N (-) +24V Shielded cable or amoured cable (grounding nearby inverter) E W W (Earthing resistance is less than 10Ω) (forward running) X1 (water fulfilled detection alarm) (reversal running) X3 X2 Multi-function input terminals (water fulfilled detection reset) COM X4 COM +24V Maximum output of 24V auxiliary power is 100mA RS485 differential communication 120Ω B- A+ Note:the function described in brackets is the factory default setting Twisted-pair shielding cable (grounding nearby by inverter) Voltage/current analog input Voltage/current analog input ( 0~10V)/(4~20mA) ( 0~10V)/ ( 4~20mA) +10V AI1 Frequency control input GND AI2 2.AI1/AI2 internal resistance:75KΩ 1.+10V maximum output:50mA Note stands fo main ciruit terminalsr .
Note 1. 2. stands for control circuit terminals. 8 ● Control loop terminal instructions Terminal Function definition Description +10V 10V auxiliary power supply output, constitutes loop with GND. MAX output 50mA +24V 24V auxiliary power supply output, constitutes loop with COM.
MAX output 100mA COM 24V power reference ground MAX output 24VDC/100mA A+ RS485 communications + B- RS485 communications - AI1 analog input 1 Voltage, current type optional AI2 analog input 2 Voltage, current type optional GND analog signal ground X1 Forward running input, and constitutes loop with COM X2 Reverse running input, and constitutes loop with COM X3 Full water detection alarm, and constitutes loop with COM X4 Full water detection reset, and constitutes loop with COM RJ45 External keyboard connection terminal