The CIU 251 is a standard interface for data transmission between a GSM/GPRS network and a Grundfos pump or controller and can be used as follows:
As an SMS interface it enables users to control and monitor Grundfos pumps and pump systems from a mobile phone. It is possible to get a message whenever a warning or an alarm occurs, to request the status or to do simple control like START, STOP and adjustment of setpoint. As a SCADA interface enabling a SCADA system or a PLC controller to establish a remote connection either via GSM call-up using the Modbus RTU protocol or via a GPRS connection using the Modbus TCP protocol. An extensive amount of data points will then be available from the connected Grundfos product. The CIU 251 unit is equipped with a 24-240V VAC/VDC power supply and can be installed as a wall-mounted unit or on a DIN rail. It is connected to the Grundfos product via the GENIbus interface, and it also has a multi-purpose IO board for connecting various sensors. It requires a GSM antenna and a SIM card.