Product Overview
Technical Summary
| Product designation | SM 321 digital input module |
|---|---|
| Digital inputs | 32 |
| Input voltage | 120 V AC; 47 … 63 Hz |
| Signal "0" input voltage | 0 to 20V |
| Signal "1" input voltage | 74 to 132V |
| Input current for signal "1", typ. | 21 mA |
| Front connector | 40-pin |
| Product lifecycle | Product cancellation |
Key Features
- Digital input configuration: SM 321 digital input module with 32 digital inputs, isolated, for 120 V AC.
- Input voltage: Input voltage type: AC. Rated value: 120 V; 47 … 63 Hz. Signal "0": 0 to 20V; signal "1": 74 to 132V.
- Front connection: Required front connector: 40-pin.
- Channel status indication: Green digital input status indicator: Yes; per channel.
- Installation capacity: Horizontal installation: 32 up to 40 °C, maximum 24 up to 60 °C. Vertical installation: 32 up to 40 °C.
- Product lifecycle: Product cancellation.
Frequently Asked Questions
What product does Siemens order number 6ES7321-1EL00-0AA0 identify?
It identifies a SIMATIC S7-300 SM 321 digital input module with 32 isolated digital inputs for 120 V AC.
Which specifications should be checked to distinguish this module variant?
Check the 32 digital inputs, 120 V AC input rating, 47 … 63 Hz frequency, 40-pin front connector, and 1x 40-pole configuration.
What connection and cable limits are supplied for this configuration?
The required front connector is 40-pin. Maximum cable length is 1 000 m shielded or 600 m unshielded.
What should be provided for a quotation request?
Provide the complete order number, required quantity, and destination.
