Technical Summary
| Product type | digital input SM 321 |
|---|---|
| Digital inputs | 16 |
| Input voltage | 24 V DC |
| Load voltage L+ | 24 V |
| Front connector | 20-pin |
| Hardware interrupt | Yes; Parameterizable |
| Diagnostics function | Yes; Parameterizable |
| Isochronous mode | Yes |
| Isolation tested with | 500 V DC |
| Power loss, typ. | 4 W |
Key Features
SIMATIC S7-300 digital input module
Digital input SM 321 with 16 DI.
Digital input SM 321 with 16 DI.
24 V DC input
Input voltage rated value: 24 V DC.
Input voltage rated value: 24 V DC.
Hardware interrupt and diagnostics
Hardware interrupt and diagnostics are supported.
Hardware interrupt and diagnostics are supported.
Isochronous mode
Suitable for isochronous mode.
Suitable for isochronous mode.
20-pole front connection
Requires a 20-pin front connector.
Requires a 20-pin front connector.
Applications
Digital input signal acquisition
For connecting 16 digital input signals at 24 V DC.
For connecting 16 digital input signals at 24 V DC.
Input monitoring with diagnostics and hardware interrupt
For diagnostic input monitoring with hardware interrupt support.
For diagnostic input monitoring with hardware interrupt support.
Frequently Asked Questions
What is Siemens 6ES7321-7BH01-0AB0?
It is a SIMATIC S7-300 digital input SM 321 module.
How many digital inputs does 6ES7321-7BH01-0AB0 provide?
It provides 16 digital inputs.
What input voltage does 6ES7321-7BH01-0AB0 use?
The rated input voltage is 24 V DC.
Which connection does 6ES7321-7BH01-0AB0 require?
It requires a 20-pin front connector.
Does 6ES7321-7BH01-0AB0 support diagnostics and hardware interrupt?
Yes. Both diagnostics and hardware interrupt are supported and parameterizable.
