S7-300 SM 321 6ES7321-1BL00-0AA0: Applications & Installation
Jan 17, 2026
The Siemens 6ES7321-1BL00-0AA0 is a high-density digital input module designed for the SIMATIC S7-300 automation system. This robust SM 321 module provides 32 opto-isolated input channels, making it ideal for industrial environments requiring reliable signal acquisition from multiple field devices. Key Features and Technical Overview This digital input module processes 24V DC signals with exceptio...