If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. ABB DSTC 120 57520001-A Connection Unit for Asynchronous Communication Interface Introduction The ABB DSTC 120 57520001‑A Connection Unit for Asynchronous Communication Interface is a robust industrial interface module engineered to centralize and organize asynchronous communication signals between field devices and c *Your Name: *Your Email: *Your Name: *Vdcode: Submit