M-Bus converter three-phase meter with adjustable converter ratio and MID. Maximum current 3x5A, standby loss only 0.5 watts per path. Modular device for mounting on DIN-EN 60715 TH35 mounting rail. 4 division units = 70mm wide, 58mm deep. Accuracy class B (1%). With M-Bus interface. This three-phase meter measures the active energy based on the currents flowing through the converters. The internal consumption of only a maximum of 0.5 watts of active power per path is not measured and not displayed. 1, 2 or 3 converters with secondary currents of up to 5A can be connected. The starting current is 10mA. The N connection must be present. The 7-segment LC display can also be read twice within two weeks without a power supply. The power consumption is displayed with an LED that flashes 10 times per kWh. To the right of the display are the MODE and SELECT buttons, which are used to scroll through the menu according to the operating instructions. First, the background lighting switches on. Then the total active energy, the active energy of the resettable memory and the instantaneous values of power, voltage and current for each outer conductor can be displayed. The transformer ratio can also be set. It is set to 5:5 at the factory and locked with a jumper across the connection terminals marked JUMPER. The transformer ratio is adapted to the installed transformer by removing the jumper and resetting it according to the operating instructions. It is then locked again with the jumper. The transformer ratios that can be set are 5:5, 50:5, 100:5, 150:5, 200:5, 250:5, 300:5, 400:5, 500:5, 600:5, 750:5, 1000:5, 1250:5 and 1500:5. Error message (false): If the outer conductor is missing or the current direction is incorrect, false and the corresponding outer conductor are shown in the display. M-Bus data transfer: When reading, all values are transferred in one telegram. The following telegrams are supported: Initialization: SND_NKE: Response: ACK. Read counter: REQ_UD2: Response: RSP_UD. Change primary address: SND_UD: Response: ACK. Reset RS1: SND_UD: Response: ACK. Slave selection for the secondary address: Response: ACK. The device does not respond to unknown queries. The transmission rate is automatically detected. The device has voltage monitoring. In the event of a voltage loss, all registers are saved in the EEPROM. Changing the M-Bus primary address: To change the M-Bus primary address, hold down SELECT for 3 seconds. In the following menu, MODE increases the address by 10, SELECT increases it by 1. When the desired primary address is set, wait until the main menu appears again. Secondary address: Using the secondary address, it is possible to communicate with the energy meter in accordance with the EN13757 standard. Wild cards can be used. Detailed information can be found in the operating instructions at www.eltako.com. Attention! Disconnect the meter's voltage paths before working on the current transformers.