SIMATIC S7-1500 digital input module DI 16×24 V DC AUX; Part number 6ES7521-7BH00-0AB0.
Detailed Parameters
Channels:16 channels in groups of 8
Supply voltage:sensor supply 24 V DC
For:24 V encoder
Input type:2 (IEC 61131)
Input delay:parameterizable 0.05..20 ms
Isochronous mode:up to 250 µs
Integrated counting function:up to 20 kHz
Functions:pulse stretching; chatter monitoring
Diagnostics:signal inversion diagnostics
Hardware interrupts:front connector (screw terminals or push-in)
Order shield set:if applicable, order shield set separately
Engineering Context
The SIMATIC S7-1500 DI 16×24 V DC AUX provides 16 digital input channels grouped in pairs of 8 for 24 V encoder applications.
Parameterizable input delay (0.05..20 ms) and isochronous mode support timed input processing up to 250 µs.
The module supports an integrated counting function up to 20 kHz and includes pulse stretching, chatter monitoring, and signal inversion diagnostics.
FAQ
1. What module family and function does 6ES7521-7BH00-0AB0 belong to?
6ES7521-7BH00-0AB0 is a SIMATIC S7-1500 digital input module DI 16×24 V DC AUX.
2. How many input channels does the DI 16×24 V DC AUX provide?
It provides 16 channels in groups of 8.
3. What input/sensor supply is supported?
It is designed for 24 V encoder and provides sensor supply 24 V DC.
4. What input type is supported?
Input type 2 (IEC 61131).
5. What are the configurable input delay limits?
Input delay is parameterizable 0.05..20 ms.
6. What is the maximum counting frequency of the integrated counting function?
The integrated counting function supports up to 20 kHz.
7. Which diagnostics and functions are integrated on the module?
The module includes pulse stretching, chatter monitoring, and signal inversion diagnostics.
8. How are hardware interrupts handled?
Hardware interrupts are supported via the front connector (screw terminals or push-in).
