Technical Summary
| Product designation | SIMATIC S7-400, digital input SM 421 |
|---|---|
| Digital inputs | 16 |
| Input voltage | 24 V DC |
| Input voltage range | 20.4 V to 28.8 V |
| Input frequency, max. | 2 kHz |
| Input current from supply voltage L+, max. | 120 mA |
| Power loss, typ. | 5 W |
| Potential separation between the channels | Yes |
| Potential separation between the channels, in groups of | 8 |
| Diagnostics function | Yes; Parameterizable |
Applications
Used for acquiring 24 V DC digital input signals with 16 isolated channels.
Used for parameterizable diagnostics, diagnostic alarms, and hardware interrupts on the input module.
Key Features
SM 421 digital input module with 16 DI for 24 V DC signals.
Diagnostics function, diagnostic alarm, and hardware interrupt are parameterizable.
Potential separation between the channels and between the channels and backplane bus.
Width: 25 mm; Height: 290 mm; Depth: 210 mm.
Frequently Asked Questions
What is Siemens 6ES7421-7BH01-0AB0?
It is a SIMATIC S7-400 SM 421 digital input module.
How many digital inputs does 6ES7421-7BH01-0AB0 have?
It has 16 digital inputs.
What is the input rating for 6ES7421-7BH01-0AB0?
The module uses 24 V DC input voltage, with a permissible range of 20.4 V to 28.8 V.
What diagnostics functions are available on 6ES7421-7BH01-0AB0?
Diagnostics function, diagnostic alarm, and hardware interrupt are parameterizable.
