Product Overview
Technical Summary
| Product designation | SIMATIC S7-300 digital input SM 321 |
|---|---|
| Digital input count | 8 |
| Input voltage type | AC |
| Rated input voltage | 120 V; 120/230 V AC (47 … 63 Hz) |
| Signal "0" input voltage | 0 to 40V |
| Signal "1" input voltage | 79 to 264V |
| Front connector | 40-pin |
| Product lifecycle | Product cancellation |
Key Features
- Product designation: SIMATIC S7-300 digital input SM 321; spare part.
- Digital inputs: 8 isolated digital inputs with an IEC 61131 type 1 input characteristic curve.
- Input voltage: AC input; rated value 120 V and 120/230 V AC (47 … 63 Hz). Signal "0": 0 to 40V; signal "1": 79 to 264V.
- Electrical isolation: Digital inputs have potential separation between channels, in groups of 1, and between channels and the backplane bus with an optocoupler.
- Connection and dimensions: Required front connector: 40-pin. Dimensions: 40 mm width, 125 mm height, and 120 mm depth.
- Installation limits: Horizontal installation: up to 60 °C, max. 8. Vertical installation: up to 40 °C, max. 8.
Frequently Asked Questions
What does 6ES7321-1FF10-0AA0 identify?
It identifies a SIMATIC S7-300 SM 321 digital input module with 8 isolated AC digital inputs.
Which specifications distinguish this exact module variant?
The supplied variant has 120/230 V AC input, 8 inputs, a 40-pin front connector, and single rooting/channel.
What code and nameplate details should be checked before inquiry?
Check the complete order number 6ES7321-1FF10-0AA0 and confirm the SIMATIC S7-300 SM 321 designation, 8 AC inputs, and 40-pin connector.
What quantity and destination are needed for a quotation?
Provide the required quantity and destination together with the complete order number for quotation review.
