Technical Summary
| Product designation | 6ES7421-1BL01-0AA0 |
|---|---|
| Module 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 |
| Input current from backplane bus 5 V DC, max. | 20 mA |
| Power loss, typ. | 6 W |
| Status indicator digital input (green) | Yes |
| Potential separation between the channels and backplane bus | Yes |
| Isolation tested with | 500 V AC/707 V DC, type test |
Applications
24 V DC digital signal acquisition
Used for connecting 32 digital inputs to an S7-400 controller.
Key Features
Exact module type
SIMATIC S7-400 digital input SM 421.
Input capacity
32 DI.
Input rating
24 V DC.
Isolation
Isolated design with potential separation between the channels and backplane bus.
Lifecycle status
Announcement of product phase-out.
Frequently Asked Questions
What is Siemens 6ES7421-1BL01-0AA0?
It is a SIMATIC S7-400 digital input SM 421 with isolated 32 DI and 24 V DC input rating.
How many digital inputs does 6ES7421-1BL01-0AA0 have?
It has 32 digital inputs.
What is the input voltage for this S7-400 digital input module?
The input voltage type is DC and the rated value is 24 V.
What lifecycle status is listed for 6ES7421-1BL01-0AA0?
Announcement of product phase-out.
