Siemens 3RK1200-0CQ20-0AA3 Soft Starter Module

Siemens 3RK1200-0CQ20-0AA3 is an AS‑Interface Compact Module (K45) that provides four digital inputs for AS‑Interface networks. This rugged input module is designed for industrial environments and carries an IP67 enclosure rating, enabling reliable operation in dusty or wet locations and when mounted in less controlled spaces. It uses four M12 sockets for field wiring and is intended to be mounted on a Siemens mounting plate (3RK1901-2EA00 or 3RK1901-2DA00), which must be ordered separately. As part of the 3RK1200 family, the device interfaces with AS‑Interface masters to translate discrete input states into signals the controller can process. Typical applications include wiring four field devices such as limit switches, proximity sensors, or other dry‑contact input devices in automation cabinets or on machine skins, where a compact, rugged digital input interface is beneficial. This module is marketed as an AS‑Interface Compact Module for the K45 series, delivering straightforward integration into existing AS‑Interface topologies with Siemens hardware and compatible master modules.