Key Features
- Digital input module: SIMATIC S7-300 digital input SM 321 with 8 DI.
- Electrical rating: 120 V/230 V AC input supply with AC input voltage.
- Connection and isolation: 1x 20-pole required front connector, with optocoupler separation between the digital inputs and backplane bus.
Technical Summary
| Product type | SIMATIC S7-300, digital input SM 321 |
|---|---|
| Function | digital input |
| Number of digital inputs | 8 |
| Input voltage | AC |
| Input voltage, rated value | 230 V; 120/230 V AC (47 … 63 Hz) |
| Input voltage for signal "0" | 0 to 40V |
| Input voltage for signal "1" | 79 to 264V |
| Load voltage L1, rated value (AC) | 230 V; 120/230 V AC |
| Input current from backplane bus 5 V DC, max. | 29 mA |
| Power loss, typ. | 4.9 W |
| Status indicator digital input (green) | Yes |
| Potential separation digital inputs and backplane bus | Yes; Optocoupler |
| Isolation tested with | 4 000 V DC |
| Required front connector | 20-pin |
Applications
- Digital input signal acquisition: Used for 8 AC digital inputs in a SIMATIC S7-300 system.
- Front-connector based module wiring: Uses a 20-pin front connector for module connection.
Frequently Asked Questions
What is Siemens 6ES7321-1FF01-0AA0?
It is a SIMATIC S7-300 digital input SM 321 module with 8 DI.
What input rating does 6ES7321-1FF01-0AA0 use?
The module uses AC input voltage with a rated value of 230 V; 120/230 V AC (47 … 63 Hz).
How many digital inputs does 6ES7321-1FF01-0AA0 provide?
It provides 8 digital inputs.
What front connector is required for 6ES7321-1FF01-0AA0?
A 20-pin front connector is required.
What are the dimensions of 6ES7321-1FF01-0AA0?
Width 40 mm, height 125 mm, depth 120 mm.
