Key Features
- Digital input module: SIMATIC S7-300, digital input SM 321.
- 16 DI at 24 V DC: Number of digital inputs: 16; input voltage type: DC; rated value: 24 V.
- Isolated channels: Potential separation between the channels and backplane bus: Yes; Optocoupler.
- 1x 20-pole front connection: Required front connector: 20-pin.
- Status indication: Status indicator digital input (green): Yes.
- Product lifecycle: Product cancellation.
Applications
- 24 V DC digital input acquisition: For connecting 24 V DC digital input signals to the SIMATIC S7-300.
- Backplane bus integration: For coupling the digital inputs to the backplane bus with optical isolation.
Technical Summary
| Number of digital inputs | 16 |
|---|---|
| Input voltage type | DC |
| Input voltage rated value | 24 V |
| Load voltage L+ rated value | 24 V |
| Load voltage L+ permissible range lower limit | 20.4 V |
| Load voltage L+ permissible range upper limit | 28.8 V |
| Input current for signal "1", typ. | 7 mA |
| Power loss, typ. | 3.5 W |
| Required front connector | 20-pin |
| Isolation tested with | 500 V DC |
Frequently Asked Questions
What is Siemens 6ES7321-1BH02-0AA0?
It is a SIMATIC S7-300 digital input SM 321 module.
How many digital inputs does 6ES7321-1BH02-0AA0 provide?
It provides 16 digital inputs.
What input voltage does 6ES7321-1BH02-0AA0 use?
The input voltage type is DC, with a rated value of 24 V.
What connection is required for 6ES7321-1BH02-0AA0?
A 20-pin front connector is required.
Does 6ES7321-1BH02-0AA0 provide isolation?
Yes. The digital inputs are isolated from the backplane bus by optocoupler.
