Product information
Overview
Key Features
- 32 isolated digital inputs: The SM 421 module has 32 digital inputs, and all 32 inputs can be controlled simultaneously.
- 120 V AC/DC input: Rated input voltage is 120 V at 47 … 63 Hz, with AC/DC input voltage type.
- Type 1 input characteristic: The digital inputs have an input characteristic according to IEC 61131, Type 1.
- Channel and bus separation: The digital inputs have potential separation between channels in groups of 8 and between the channels and the backplane bus.
- Input signal thresholds: Signal "0" is 0 to 20 V UC; signal "1" is 79 to 132 V AC or 80 to 132 V DC.
- 2-wire sensor support: The module supports 2-wire sensors with a permissible quiescent current of 1 mA max.
Technical Summary
| Product | 6ES7421-1EL00-0AA0 |
|---|---|
| Product type | SIMATIC S7-400, digital input SM 421 |
| Digital inputs | 32 isolated DI |
| Input voltage | 120 V; 47 … 63 Hz |
| Input voltage type | AC/DC |
| Input characteristic | According to IEC 61131, Type 1 |
| Simultaneously controllable inputs | 32 |
| Signal "0" | 0 to 20 V UC |
| Signal "1" | 79 to 132 V AC; 80 to 132 V DC |
| Potential separation | Between channels in groups of 8; between channels and backplane bus |
| Product lifecycle | Announcement of product phase-out |
Frequently Asked Questions
What is the exact Siemens model and module type?
It is Siemens 6ES7421-1EL00-0AA0, a SIMATIC S7-400 digital input SM 421 module.
How many digital inputs does the module have?
It has 32 isolated digital inputs, with 32 inputs controllable simultaneously.
What input voltage does this module use?
The input voltage type is AC/DC, with a rated value of 120 V at 47 … 63 Hz.
Does it support 2-wire sensors?
Yes. It supports 2-wire sensors with a permissible quiescent current of 1 mA max.
What should be included in an inquiry?
Please provide the required quantity and destination for an MRO or project quotation.
