Technical Summary
| Product function | Digital input |
|---|---|
| Series | SIMATIC S7-300 |
| Module type | SM 321 |
| Number of digital inputs | 16 |
| Input voltage type | AC/DC |
| Input voltage rated value (DC) | 24 V; DC 24 or 48 V |
| Input voltage rated value (AC) | 24 V; 24 V AC or 48 V AC (0 … 63 Hz) |
| Input current for signal "1" | 2.7 mA |
| Power loss, typ. | 1.5 W; at 24 V; 2,8 W at 48 V |
| Isolation tested with | 1 500 V AC |
| Required front connector | 40-pin |
Key Features
SIMATIC S7-300 digital input module
Digital input SM 321 for the SIMATIC S7-300 series.
Digital input SM 321 for the SIMATIC S7-300 series.
16 digital inputs
Provides 16 DI.
Provides 16 DI.
24-48 V AC/DC input range
Designed for 24-48 V AC/DC input signals.
Designed for 24-48 V AC/DC input signals.
Isolated input design
Specified as isolated, with potential separation between the channels and the backplane bus via optocoupler.
Specified as isolated, with potential separation between the channels and the backplane bus via optocoupler.
1x 40-pole front connector
Requires a 40-pin front connector.
Requires a 40-pin front connector.
Applications
Acquisition of discrete input signals
For connecting 16 digital input signals in an S7-300 station.
For connecting 16 digital input signals in an S7-300 station.
Integration of AC/DC input circuits
For handling 24-48 V AC/DC input signals.
For handling 24-48 V AC/DC input signals.
Frequently Asked Questions
What is Siemens 6ES7321-1CH00-0AA0?
It is a SIMATIC S7-300 digital input SM 321 with 16 DI.
What input voltage range does 6ES7321-1CH00-0AA0 support?
The input voltage is 24-48 V AC/DC.
How many digital inputs does 6ES7321-1CH00-0AA0 have?
It has 16 digital inputs.
What front connector is required for 6ES7321-1CH00-0AA0?
A 1x 40-pole front connector is required.
