Key Features
- Digital input module: SIMATIC S7-300 digital input SM 321 with 32 DI.
- Electrical input details: Input voltage: DC 24 V, with signal "0" at -30 to +5 V and signal "1" at 13 to 30V.
- Isolation and connection: Potential separation between the channels and backplane bus: Yes; Optocoupler. Required front connector: 40-pin.
- Installation and size: Width 40 mm, height 125 mm, depth 120 mm.
- Operating and wiring data: Typical power loss: 6.5 W. Cable length max.: 1 000 m shielded and 600 m unshielded.
Applications
- Discrete signal input handling: For connecting 24 V DC digital input signals to a SIMATIC S7-300 system.
- 24 V DC sensor signal acquisition: For reading 2-wire sensor signals through the isolated digital inputs.
Technical Summary
| Product function | SIMATIC S7-300, digital input SM 321 |
|---|---|
| Number of digital inputs | 32 |
| Input voltage | 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 |
Frequently Asked Questions
What is Siemens 6ES7321-1BL00-0AA0?
It is a SIMATIC S7-300 digital input SM 321 with 32 DI.
How many digital inputs does 6ES7321-1BL00-0AA0 have?
It has 32 digital inputs.
What input voltage does this module use?
The input voltage is DC 24 V.
What front connector is required for this module?
A 40-pin front connector is required.
