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4 Installing the pump controller
50
bplogic intelligent pump controller
18/02/2021
COM 1: Modbus
Pin
Allocation
Pin 1
–
Pin 2
RS485/A
Pin 3
–
Pin 4
RS485/B
PWR: Power supply
The 24 V power supply must meet the requirements of protective
extra-low voltage (PELV) or safety extra-low voltage (SELV
protection class III).
Pin
Allocation
Pin 1
U_A
Pin 2
U_LS
Pin 3
GND_A
Pin 4
GND_LS
Pin 5
FE
1)
1)
Also functional earth is connected to the shilding of the M12 connection