Siemens 6EC1110-3A Programmable Logic Controller Module

Siemens 6EC1110-3A is a SIMATIC C1 timing module designed for use with Siemens' vintage SIMATIC C1 controllers. Marketed as a Laufzeit (timing) element, this in-package module provides fixed delay options of 10 ms, 30 ms, 100 ms, and 750 ms, enabling precise sequencing in legacy automation circuits. It includes auxiliary XR connections and a dedicated M reference on pin 3, enabling straightforward integration into the C1 timing network. As part of the SIMATIC C1 family, the 6EC1110-3A is intended for installations requiring discrete timing blocks within the older Siemens hardware ecosystem, such as event sequencing and time-based control within the controller's logic. The module is designed for compatibility with C1-era automation setups and is suitable for retrofits, spare parts, or field maintenance of legacy Siemens systems that rely on time-delay elements.