Technical Summary
| Product designation | SIMATIC S7-400, digital input SM 421, isolated 16 DI; UC 24 – 60 V, alarm, diagnostics |
|---|---|
| Digital inputs | 16 |
| Input voltage type | AC/DC |
| Rated input voltage (UC) | 24 V; 24 V UC to 60 V UC (47 … 63 Hz) |
| Input current from backplane bus 5 V DC, max. | 150 mA |
| Power loss, typ. | 8 W; 3.5 W (24 V DC); 6.5 W (48 V DC); 8.0 W (60 V DC) |
| Potential separation between channels | Yes |
| Potential separation between channels and backplane bus | Yes |
| Isolation tested with | 1 500 V AC |
| Diagnostics function | Yes; Parameterizable |
Applications
Acquires 16 isolated digital input signals for a SIMATIC S7-400 controller setup.
Supports alarm and diagnostics handling for the digital input channels.
Key Features
Digital input SM 421 with 16 DI and isolation between the channels.
Rated value (UC): 24 V; 24 V UC to 60 V UC (47 … 63 Hz).
Alarm and diagnostics functions are included for the input module.
Type of input voltage: AC/DC.
Supplied lifecycle: Announcement of product phase-out.
Frequently Asked Questions
What is Siemens 6ES7421-7DH00-0AB0?
It is a SIMATIC S7-400 digital input SM 421 module with 16 isolated DI, UC 24 – 60 V, alarm and diagnostics.
How many digital inputs does 6ES7421-7DH00-0AB0 have?
It has 16 digital inputs.
What input voltage does the 6ES7421-7DH00-0AB0 support?
Type of input voltage: AC/DC. Rated value (UC): 24 V; 24 V UC to 60 V UC (47 … 63 Hz).
What is the lifecycle status of Siemens 6ES7421-7DH00-0AB0?
The supplied lifecycle is announcement of product phase-out.
What are the dimensions of the 6ES7421-7DH00-0AB0 module?
Width: 25 mm. Height: 290 mm. Depth: 210 mm.
