Modbus two-way three-phase meter. Maximum current 3x80A, standby loss only 0.8 watts at L1 and 0.5W each at L2 and L3. Modular device for mounting on DIN-EN 60715 TH35 mounting rail in installation cabinets with protection class IP51. 4 division units = 70 mm wide, 58 mm deep. Accuracy class B (1%). With Modbus / RTU (RS485) interface. The direct measuring three-phase meter measures the active energy based on the currents flowing between the inputs and outputs. The self-consumption of only 0.8 watts or 0.5W active power per path is not measured and not displayed. The active energy is added depending on the sign. Positive power in the meter means energy consumption, negative power means energy supply. The energy measurement is carried out on a balancing basis. If the energy consumption (P positive) is greater than the energy supply (P negative), the meter reading T arrow is increased to the right. If the energy supply is greater than the energy consumption, the meter reading T arrow is increased to the left. Energy consumption is shown with a right arrow and energy supply is shown with a left arrow, each above the active bar in the display. 1, 2 or 3 external conductors with currents of up to 80 A can be connected. The starting current is 4OmA. The L1 and N connections must be present. Connection via RS485 Modbus data logger: Data transfer Modbus / RTU (RS485) and address assignment as per the operating instructions. Energy consumption and energy supply are stored non-volatilely and are immediately displayed again after a power failure. The 7-segment LC display can also be read twice within two weeks without a power supply. The power consumption is shown with an LED next to the display that flashes 1000 times per kWh. To the right of the display are the MODE and SELECT buttons, which are used to scroll through the menu as per the operating instructions. First, the background lighting switches on. Then the total active energy per consumption and delivery, the active energy of the resettable consumption and delivery memories, and the instantaneous values of power, voltage and current per outer conductor can be displayed. Error message: If an outer conductor is missing, the corresponding outer conductor is shown in the display.