Product Description
Key Features
- SIMATIC S7-300 SM 321 identity: Digital input module with 8 isolated AC digital inputs for 120/230 V AC.
- AC input ratings: Input voltage type: AC. Rated input value: 120 V; 120/230 V AC (47 … 63 Hz).
- Potential separation: Digital inputs have potential separation between channels, in groups of 1, and from the channels to the backplane bus by optocoupler.
- Front connection: Required front connector: 40-pin.
- Installation limits: Maximum quantity is 8 for horizontal installation up to 60 °C and 8 for vertical installation up to 40 °C.
- Product lifecycle: Product cancellation.
Applications
- AC digital input acquisition: Acquires signals through 8 isolated AC digital inputs.
Technical Summary
| Product type | SIMATIC S7-300 digital input SM 321 |
|---|---|
| Digital inputs | 8 |
| Input voltage | AC; rated value 120 V; 120/230 V AC (47 … 63 Hz) |
| Potential separation | Between channels, in groups of 1; between channels and backplane bus: Yes; Optocoupler |
| Front connector | 40-pin |
| Horizontal installation | up to 60 °C, max. 8 |
| Vertical installation | up to 40 °C, max. 8 |
| Input current from backplane bus | 5 V DC, max. 100 mA |
| Power loss | typ. 4.9 W |
| Product lifecycle | Product cancellation |
Frequently Asked Questions
Which exact Siemens model should be confirmed for this input module?
Confirm order number 6ES7321-1FF10-0AA0 and the SIMATIC S7-300 SM 321 identity.
How many AC digital inputs does 6ES7321-1FF10-0AA0 have?
It has 8 digital inputs with an AC input voltage type and a rated value of 120 V; 120/230 V AC (47 … 63 Hz).
What front connector is required?
The required front connector is 40-pin.
Does the module include diagnostic alarms or parameterizable standard inputs?
It has no diagnostic alarm, no hardware interrupt, no diagnostics function, and standard inputs are not parameterizable.
What lifecycle status is recorded for this configuration?
Product cancellation is recorded; confirm the requested quantity, destination, and condition preference for the part request.
