Product Overview
Applications
Used for acquiring digital input signals through 4 current-sourcing inputs.
Technical Summary
| Product type designation | SB 1221, DI 4×24 V DC 200 kHz |
|---|---|
| Digital inputs | 4; Current-sourcing |
| Rated input voltage | 24 V DC |
| Input current from backplane bus | 5 V DC, typ. 40 mA |
| Power loss | 1 W, typ. |
| Signal "0" input current | 1.4 mA max. permissible quiescent current |
| Signal "1" input current | 2.9 mA min.; 7 mA typ. |
| Shielded cable | 50 m max.; shielded, twisted pair |
| Input status indication | LED |
Key Features
Has 4 current-sourcing digital inputs in groups of 4.
Rated input value is 24 V DC.
The product designation specifies 200 kHz.
Signal "0" permissible quiescent current is 1.4 mA max.; signal "1" input current is 2.9 mA min. and 7 mA typ.
Standard inputs support parameterizable input filtering from 0.1 μs to 20.0 μs and from 0.05 ms to 20.0 ms; interrupt and technological-function inputs are parameterizable.
Maximum shielded cable length is 50 m with shielded, twisted pair. An LED indicates input status.
Frequently Asked Questions
What is the exact product type and input capacity?
It is Siemens 6ES7221-3BD30-0XB0, product type SB 1221, with 4 current-sourcing digital inputs.
What input voltage does this line item use?
The rated input value is 24 V DC.
What cable length and cable type are specified?
The maximum shielded cable length is 50 m, using shielded, twisted pair.
Does the configuration include anything beyond the digital input module?
The supplied configuration identifies the SB 1221 digital input module; no additional included items are specified.
