Siemens TRE111B20 is a timing relay module used in industrial control systems to introduce a defined time delay between an input signal and its output. This device belongs to Siemens' TRE timing-relay family and is designed for installation in standard control panels, offering a compact timing solution for simple sequencing and interlock functions. The TRE111B20 variant denotes a specific configuration within the TRE111 line, providing reliable, deterministic timing behavior in automation circuits.
