Siemens 6ES5445-3AA11 Analog Input Expansion Module

Siemens 6ES5445-3AA11 is a SIMATIC S5 445 digital output expansion module in the compact version, delivering 32 DC outputs at 24 V DC with a rated current of up to 0.5 A per output and configured as non‑isolated from the backplane. This 32‑point digital output module is designed to extend an S5 controller’s ability to energize external devices, such as relays, contactors, solenoids, indicators, and other 24 V DC loads, by switching them through the backplane interconnection of an S5 rack. Housed in the compact 445 family form factor, it provides dense, plug‑in expansion for control cabinets where space is at a premium while maintaining Siemens’ standard for reliability and compatibility with existing SIMATIC S5 I/O architectures. The 6ES5445-3AA11 is intended for use with compatible SIMATIC S5 CPUs and expansion racks, leveraging the classic S5 I/O addressing scheme to coordinate with other digital outputs in a single rack or across multiple modules. In industrial environments, it supports straightforward wiring and robust operation for automation tasks that require multiple 24 V DC actuation channels, making it a common choice for scalable control of lighting, signaling, and mechanical actuation in legacy Siemens installations.