Product Overview
Technical Summary
| Product designation | SIMATIC S7-300 digital input SM 321, isolated |
|---|---|
| Number of digital inputs | 16 |
| Input voltage | 48 V DC to 125 V DC |
| Signal "0" input voltage | -146 V DC to +15 V DC |
| Signal "1" input voltage | 30 V DC to 146 V DC |
| Required front connector | 20-pin |
| Potential separation | Between digital inputs and backplane bus: Yes; Optocoupler |
| Product status | Product cancellation |
Key Features
- Product designation: SIMATIC S7-300 digital input SM 321, isolated; spare part.
- Digital inputs: 16 digital inputs with input characteristic curve in accordance with IEC 61131, type 1.
- Input voltage: DC; rated value 48 V and 48 V DC to 125 V DC.
- Signal thresholds: Signal "0": -146 V DC to +15 V DC; signal "1": 30 V DC to 146 V DC.
- Connection and dimensions: Required 20-pin front connector; width 40 mm, height 125 mm, depth 120 mm.
- Product status: Product cancellation.
Frequently Asked Questions
What product does Siemens 6ES7321-1CH20-0AA0 identify?
It identifies a SIMATIC S7-300 SM 321 isolated digital input module with 16 digital inputs.
Which specifications distinguish this 6ES7321-1CH20-0AA0 variant?
The supplied variant has 48-125 V DC input voltage, 16 digital inputs, and a required 20-pin front connector.
What should be checked when verifying this Siemens order number?
Check the complete 6ES7321-1CH20-0AA0 code, the SIMATIC S7-300 SM 321 designation, the 48-125 V DC input range, and the 20-pin front connector.
What information is needed for a quotation?
Provide the required quantity and destination together with the complete 6ES7321-1CH20-0AA0 order number.
