Technical Summary
| Product designation | SIMATIC S7-300, digital input SM 321, isolated 32 DI, 24 V DC, 1x 40-pole |
|---|---|
| Lifecycle | Product cancellation |
| Number of digital inputs | 32 |
| Input voltage type | DC |
| Input voltage rated value | 24 V |
| Input voltage for signal "0" | -30 to +5 V |
| Input voltage for signal "1" | 13 to 30V |
| Input current for signal "1", typ. | 7 mA |
| Power loss, typ. | 6.5 W |
| Potential separation between the channels and backplane bus | Yes; Optocoupler |
| Required front connector | 40-pin |
| 2-wire sensor permissible quiescent current, max. | 1.5 mA |
| Isochronous mode | No |
| Input characteristic curve in accordance with IEC 61131, type 1 | Yes |
| Status indicator digital input (green) | Yes |
Applications
Use for connecting 24 V DC digital input signals to a SIMATIC S7-300 system.
Use for connecting 2-wire sensors with a permissible quiescent current up to 1.5 mA.
Key Features
SM 321 digital input module for the SIMATIC S7-300 family.
Provides 32 DI with potential separation between the channels and backplane bus via optocoupler.
Input voltage is DC with a rated value of 24 V.
Requires a 40-pin front connector.
Lifecycle information supplied as Product cancellation.
Frequently Asked Questions
What is Siemens 6ES7321-1BL00-0AA0?
It is a SIMATIC S7-300 digital input SM 321 module with isolated 32 DI, 24 V DC and 1x 40-pole connection.
How many digital inputs does 6ES7321-1BL00-0AA0 provide?
It provides 32 digital inputs.
What front connector is required for this module?
A 40-pin front connector is required.
What are the input voltage values for 6ES7321-1BL00-0AA0?
The input voltage is DC with a rated value of 24 V, a permissible range of 20.4 V to 28.8 V, and signal levels of -30 to +5 V for signal "0" and 13 to 30V for signal "1".
