ABB: Symphony Plus SD Series Control & I/O Products
The Symphony Plus SD (Symphony DIN) Series is a green portfolio of completely scalable control and I/O products that work in any environment or geographic location. Through seamless interconnections with smart field and electrical devices and higher-level applications, these rugged control and I/O products deliver lower energy consumption, an extreme operating temperature range, and a scalable architecture in a compact, modular footprint, making SD Series a smart automation solution for your new installation, upgrade or expansion.

