Technical Summary
| Product type | SIMATIC S7-400, digital input SM 421, isolated 32 DI; 120 V DC/AC |
|---|---|
| Number of digital inputs | 32 |
| Input type | AC/DC |
| Rated value (UC) | 120 V; 47 … 63 Hz |
| Input signal "1" | 79 to 132 V AC; 80 to 132 V DC |
| Input characteristic according to IEC 61131 | Type 1 |
| Backplane bus current, max. | 200 mA |
| Power loss, typ. | 6.5 W |
Applications
For acquiring 32 AC/DC digital input signals in a SIMATIC S7-400 system.
For connection of 2-wire sensors.
Key Features
Digital input module with 32 DI.
Rated value (UC): 120 V; 47 … 63 Hz.
Input characteristic according to IEC 61131: Type 1.
Potential separation is provided between the channels and between the channels and backplane bus.
Announcement of product phase-out.
Frequently Asked Questions
What is Siemens 6ES7421-1EL00-0AA0?
It is a SIMATIC S7-400 digital input SM 421 module with isolated 32 DI and 120 V DC/AC input.
How many digital inputs does 6ES7421-1EL00-0AA0 have?
It has 32 digital inputs.
What input voltage does 6ES7421-1EL00-0AA0 use?
Rated value (UC): 120 V; 47 … 63 Hz. For signal "1", it uses 79 to 132 V AC or 80 to 132 V DC.
What is the maximum cable length for 6ES7421-1EL00-0AA0?
Shielded cable length is max. 1 000 m, and unshielded cable length is max. 600 m.
How much backplane bus current does 6ES7421-1EL00-0AA0 draw?
From backplane bus 5 V DC, max.: 200 mA.
