Technical Summary
| Product type | SIMATIC S7-400, digital input SM 421, isolated 32 DI; 24 V DC |
|---|---|
| Number of digital inputs | 32 |
| Input voltage type | DC |
| Rated value (DC) | 24 V |
| Input characteristic according to IEC 61131 | Type 1 |
| Number of simultaneously controllable inputs | 32 |
| Input current from backplane bus 5 V DC, max. | 20 mA |
| Power loss, typ. | 6 W |
| Isolation tested with | 500 V AC/707 V DC, type test |
Key Features
SIMATIC S7-400 SM 421 digital input module
Digital input module for the SIMATIC S7-400 family.
Digital input module for the SIMATIC S7-400 family.
32 DI
Provides 32 digital inputs.
Provides 32 digital inputs.
24 V DC input
Uses DC input voltage with a rated value of 24 V.
Uses DC input voltage with a rated value of 24 V.
Isolated digital inputs
Digital inputs are isolated from the backplane bus.
Digital inputs are isolated from the backplane bus.
Green status indicator
Status indicator digital input (green): Yes.
Status indicator digital input (green): Yes.
Applications
24 V DC signal acquisition
Collecting 24 V DC digital input signals in a SIMATIC S7-400 station.
Collecting 24 V DC digital input signals in a SIMATIC S7-400 station.
Frequently Asked Questions
What is 6ES7421-1BL01-0AA0 in the SIMATIC S7-400 range?
It is a SIMATIC S7-400, digital input SM 421 module with 32 DI and 24 V DC input.
How many digital inputs does 6ES7421-1BL01-0AA0 provide?
It provides 32 digital inputs.
What input voltage does 6ES7421-1BL01-0AA0 use?
The input voltage is DC, with a rated value of 24 V.
What are the cable length limits for 6ES7421-1BL01-0AA0?
The maximum cable length is 1 000 m for shielded cable and 600 m for unshielded cable.
