my-PV ELWA Modbus Interface
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The ELWA Modus Interface from my-PV (MPN: 12-0111) is the ideal link between your ELWA PV water heater and a Modbus-based bus system. Thanks to the two "Temp" terminals, you can connect the enclosed temperature sensor in no time at all. This gives you even more precise temperature data and allows you to optimally control your application.
About the interface
- Display via LED
- Multiple connection options
- Hot water backup can be controlled via temperature sensors
- 2-year manufacturer's warranty
Connection options
Power supply - You can either use the supplied plug-in power supply on the micro USB connection (5V DC) or use the +24V/GND terminals for a voltage of 12-24V DC.
Temperature sensor - The supplied temperature sensor can be easily connected to the "Temp" terminals. The 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 optimum 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 optimum function. This resistor should ideally be installed at the furthest point from the bus master. The required resistor is already included in the packaging, so you can get started straight away.
Scope of delivery
1x ELWA Modbus interface
1x 5V power supply unit for power supply
1x temperature sensor with 2m connection cable
Installation instructions
Manufactuerer Information
my-pv
my-pv
Betriebsstraße 12
4523 Neuzeug
Austria
Mail: info@my-pv.com
Tel.: +43 7259 39328