Product Overview
Technical Summary
| Product designation | SIMATIC S7-300 SM 321 digital input module |
|---|---|
| Digital inputs | 32 isolated DI |
| Input voltage | 24 V DC rated |
| Signal "0" | -30 to +5 V |
| Signal "1" | 13 to 30V |
| Front connector | 40-pin |
| Load voltage L+ | 24 V DC; permissible range 20.4 V to 28.8 V |
| Product lifecycle | Product cancellation |
Key Features
- Module designation: SIMATIC S7-300 SM 321 digital input module; spare part.
- Digital inputs: 32 isolated digital inputs with an IEC 61131 type 1 input characteristic curve.
- Input voltage: DC input, rated value 24 V; signal "0": -30 to +5 V and signal "1": 13 to 30V.
- Connection: Required front connector: 40-pin.
- Load voltage: Rated load voltage L+ is 24 V DC, with a permissible range of 20.4 V to 28.8 V.
- Installation dimensions: Width: 40 mm; height: 125 mm; depth: 120 mm.
Frequently Asked Questions
What does Siemens 6ES7321-1BL00-0AA0 identify?
It identifies a SIMATIC S7-300 SM 321 digital input module with 32 isolated digital inputs and 24 V DC input.
Which specifications distinguish this exact module variant?
The listed variant has 32 isolated DI, a 24 V DC rated input, a 40-pin front connector, and a 40 mm × 125 mm × 120 mm body.
What should be checked when verifying the code?
Check the complete order number 6ES7321-1BL00-0AA0 together with the module designation, 32 DI configuration, input voltage, and front connector.
What details are needed for a quotation?
Provide the required quantity and destination, and request verification of the complete order number.
