This CANopen Daisy chain communication card is an option for variable speed drives of Altivar range.It is equipped with 4 connectors, 1 removable screw terminal block, 2 RJ45 connectors for daisy-chain connection to the CANopen machine bus, 1 RJ45 connector for connection to the Modbus serial link.It is compatible with Altivar 312 drives.It enables integration of your variable speed drive in your process control network.It weighs 200g.