SIEMENS 6ES7521-1BH00-0AB0
- By SIEMENS
- Part #: 6ES7521-1BH00-0AB0
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Siemens SIMATIC S7-1500 Digital Input Module
Description
This is a Siemens SIMATIC S7-1500 digital input module, model 6ES7521-1BH00-0ABO. It is a High Feature (HF) module designed for advanced control applications, providing 16 channels for 24V DC signals. Its capabilities include configurable input delays and comprehensive diagnostics, making it a powerful component for precise and reliable automation systems.
Specifications
- Manufacturer: Siemens
- Product Line: SIMATIC S7-1500
- Model: 6ES7521-1BH00-0ABO
- Function: Digital Input Module DI 16x24VDC HF
- Number of Inputs: 16
- Input Voltage: 24V DC
- Supply Voltage: 24V DC
- Functional State (FS): 01
Label Info
- Type: DI 16x24VDC HF
- Part Number: 1P 6ES7 521-1BH00-0ABO
- Serial Number: S C-D2SD3462 2013
Application
This module is used in the Siemens S7-1500 PLC system for reading digital signals from sensors, switches, and other field devices. The High Feature capabilities make it ideal for applications requiring fast signal acquisition, motion control, and high-level diagnostics.
Country of Origin
Made in Germany.
CO2 Impact
By purchasing this pre-owned module, you contribute to a circular economy and help avoid the emission of 9.2 kg of CO2 associated with the production of a new unit. This is comparable to the savings from driving a car for 46 kilometers.
Availability
This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.
FAQ
What is the difference between this HF (High Feature) module and a standard (ST) S7-1500 DI module?
The HF module offers advanced features like shorter input delays (configurable from 0.05 ms), diagnostics for wire breaks or short circuits, and the ability to generate hardware interrupts, making it suitable for high-speed and critical applications.
Does this module come with the front connector?
No, the front connector is not included with the module from the factory and must be ordered separately. Siemens offers both screw-type (6ES7592-1AM00-0XB0) and push-in (6ES7592-1BM00-0XB0) versions to suit your wiring preference.
What firmware version (FS) is this module, and is it compatible with all S7-1500 CPUs?
This module is hardware functional state FS:01. It is compatible with all S7-1500 CPUs, but to use all its features, your TIA Portal project and CPU firmware should be up to date. Always check the TIA Portal hardware catalog for specific compatibility details.
Last Update: Friday, March 13, 2026
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