Siemens 6AB7022-0BAThe Siemens 6AB7022 0BA is a versatile programmable logic controller (PLC) module tailored for the SIMATIC S7 200 and S7 300 series systems, making it an essential component for industrial automation in process control and monitoring applications. This digital input module features 16 channels that accept a broad spectrum of digital signals, including contact closures and optically isolated inputs, with support for both DC and AC signals up to 30V DC