| Product Type | S7-300 Digital Extension |
| Product Model | 6ES7321-1FF10-0AA0 |
| Supply Voltage Type | AC |
| Product dimensions | 40 MM × 125 MM × 120 MM |
| Input Current | Incoming backplane bus DC 5 V, maximum value 100 mA |
| Weight | 240 g |
8-Channel 120V AC Digital Input – Direct AC Signal Connection:Provides 8 independent 120V AC digital inputs, allowing direct connection to field devices such as contactors, pushbuttons, and relay contacts without external signal conversion.
Designed for High-Voltage AC Applications – Safe & Reliable:Rated for 120V AC input, ideal for industrial control systems in North America and other regions using 120V AC control circuits, with built-in surge and noise protection.
Galvanic Isolation for Strong Noise Immunity:Features 500V AC isolation between input channels and backplane bus, protecting the CPU from electrical disturbances and enhancing system reliability.
LED Indicators for Real-Time Channel Status:Each input has a green LED to show active status, enabling quick visual diagnostics and on-site troubleshooting during commissioning and maintenance.
Wide Input Voltage Range for High Compatibility:Operates reliably within 90–132V AC, accommodating voltage fluctuations commonly found in industrial environments.
