This manual describes the Qalcosonic E3/E4 Modbus RTU Slave Module, covering communication protocols, register definitions, and configuration procedures.
The Qalcosonic E3/E4 Modbus RTU Slave Module is an independent processor designed to retrieve data from modular heat meters and transmit it to reading systems via an RS485 interface. It supports the Modbus RTU protocol, allowing up to 247 slaves to be connected in a bus or star network configuration. The module operates on a 12-24 V AC/DC power supply and features a status LED and a SET (RESET) button for monitoring communication events and resetting parameters.
| Supported Protocol | Modbus RTU |
|---|---|
| Max Slaves | 247 |
| Power Supply | 12-24 V AC/DC |
| Max Power Consumption | 2 W |
| Typical Current Supply | 50 mA |
| Slave Address Range | 1 – 247 |
| Default Baud Rate | 9600 |
| Data Format (Default) | 8E1 |
Turn off the module, wait 10 seconds, press and hold the SET button, then turn on the power and wait for the LED to blink frequently.
The default address is the same as the meter's M-Bus address.
The default communication with the energy meter is 2400 baud rate, 8 data bits, Even parity, and 1 stop bit.