Power Supply and Data Transmission: How Does the SMI Master Work?
Like DALI, SMI uses a 5-wire cable to connect the controllers to the drives, providing both power supply and data transfer. This cable can have a length of up to 350 m at a data rate of up to 2400 bps. Two free wires are used as a bus cable to connect the SMI master module and up to 16 drives. The 750-1630 SMI Master Module controls 230 VAC SMI motors, and the 753-1631 model can be used with low voltage shade drives (24 V). The SMI master module offers users numerous helpful functions: the “auto-replace” function, for example, allows building operators to replace a defective motor without modifying the control program. In offline mode, module settings, configurations and addressing can be adjusted without connecting to the controller. And in “Easy” mode, curtain control is possible without cumbersome PLC programming.
Expected Availability: 2nd Quarter of 2017