Siemens 6GK1561-4AA00

The Siemens part number 6GK1561-4AA00 is a digital input module within the Siemens Simatic S7-200 series of programmable logic controllers (PLCs), engineered for seamless integration with a variety of sensors and actuators. This module features four digital inputs capable of accepting both DC and AC signals, accommodating signal types such as NPN, PNP, and NO/NC contacts, with a maximum input voltage of up to 250V AC or 30V DC. A robust high input impedance ensures compatibility with diverse applications, while the 24V DC power supply requirement and moderate current draw of 100mA facilitate efficient operation. Installation is straightforward, complemented by a comprehensive user manual detailing setup, programming using Ladder Logic, troubleshooting guides, and wiring diagrams, making it easy to address common issues such as faulty connections or power supply failures. This module not only enhances system reliability by managing input errors and generating alarms for signal conditions, but also supports flexible programming options, positioning it as a vital component in modern automation solutions.