Product information
Overview
Key Features
- 8 digital inputs: The SM 321 module has 8 digital inputs with an AC input voltage type.
- Isolated inputs: The digital inputs are electrically separated from the backplane bus by an optocoupler.
- AC input rating: Rated input voltage is 230 V; the module supports 120/230 V AC at 47 … 63 Hz.
- Input signal ranges: Signal "0" is 0 to 40V, while signal "1" is 79 to 264V.
- 20-pin connection: The required front connector is 20-pin.
- Product lifecycle: The product lifecycle is Product cancellation.
Technical Summary
| Product type | SIMATIC S7-300 SM 321 digital input module |
|---|---|
| Digital inputs | 8 |
| Input voltage type | AC |
| Rated input voltage | 230 V; 120/230 V AC (47 … 63 Hz) |
| Signal "0" input voltage | 0 to 40V |
| Signal "1" input voltage | 79 to 264V |
| Front connector | 20-pin |
| Input isolation | Between digital inputs and backplane bus; optocoupler |
| Product lifecycle | Product cancellation |
Frequently Asked Questions
What is the exact Siemens model and module type?
It is Siemens 6ES7321-1FF01-0AA0, a SIMATIC S7-300 SM 321 digital input module.
How many digital inputs does this module have?
It has 8 digital inputs with AC input voltage.
What connector is required?
The required front connector is 20-pin.
Are the digital inputs isolated from the backplane bus?
Yes. The digital inputs are separated from the backplane bus by an optocoupler.
What information should I provide for a quotation?
Provide the required quantity and destination for the quotation.
