The Aquamonix Emflux 500 series flowmeter transmitters have three expansion card slots. The modbus card (also known as the modem card) adds functionality to poll Modbus registers on the transmitter over Serial RS232 or RS485. By reading exact flow and volume data from the flowmeter you can be assured that your PLC / RTU / SCADA has the accurate reading from your Emflux flowmeter. Using Modbus communications also provides access to a range of configuration a diagnostic data, helping you remotely manage your watermeter infrastructure.