Product Overview
Technical Summary
| Product designation | SIMATIC S7-300 digital input SM 321, isolated |
|---|---|
| Digital inputs | 16 |
| Input voltage | 24 V DC rated |
| Load voltage range | 20.4 V to 28.8 V DC |
| Front connector | 20-pin |
| Backplane bus isolation | Yes; Optocoupler |
| Product lifecycle | Product cancellation |
Key Features
- Product designation: SIMATIC S7-300 digital input SM 321, isolated; spare part.
- Digital inputs: 16 digital inputs with an IEC 61131 type 1 input characteristic curve.
- Input voltage: DC input voltage, rated value 24 V; signal "0": -30 to +5 V and signal "1": 13 to 30V.
- Load voltage: L+ rated value 24 V DC, permissible range 20.4 V to 28.8 V.
- Connection and isolation: Required 20-pin front connector; isolation between digital inputs and the backplane bus by optocoupler, tested with 500 V DC.
- Lifecycle: Product cancellation.
Frequently Asked Questions
What does 6ES7321-1BH02-0AA0 identify?
It identifies a SIMATIC S7-300 SM 321 isolated digital input with 16 DI and 24 V DC input voltage.
Which specifications distinguish this module variant?
The listed variant has 16 digital inputs, a 20-pin front connector, 24 V DC rated input voltage, and no parameterizable standard inputs.
What connector is required?
A 20-pin front connector is required.
What details are needed for a quotation?
Provide the complete code 6ES7321-1BH02-0AA0, required quantity, and destination.
