my-PV ELWA Modbus-interface

The ELWA Modbus Interface from my-PV is the ideal link between your ELWA PV water heating device and a Modbus-based bus system.

• LED indication
• Multiple connection options
• Hot water assurance controllable via temperature sensors
• Thanks to the two "Temp" terminals, you can connect the included temperature sensor in no time. This gives you even more precise temperature data and allows you to control your application optimally.
• Interface information

Power supply - You can either use the included plug-in power supply on the Micro-USB port (5V DC) or use the +24V/GND terminals for a voltage of 12-24V DC.

Temperature sensor - The included temperature sensor can be easily connected to the "Temp" terminals. Polarity does not matter, which makes installation particularly easy.

Modbus connection - Connect the Modbus to terminals A (D+) and B (D-). It is important to pay attention to the correct polarity to ensure optimal function.

• Terminating resistor in the bus system

Bus systems are sensitive to interference, so the use of a terminating resistor (120 Ohm) is crucial for optimal function. This resistor should ideally be installed at the farthest point from the bus master. The required resistor is already included in the packaging, so you can get started right away.

• Included in delivery
• 1x ELWA Modbus Interface
• 1x 5V power supply unit
• 1x temperature sensor with 2m connection cable
• Mounting instructions