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| Place of Origin: | U.K. |
| Brand Name: | Siemens |
| Certification: | COO & COC |
| Model Number: | 6ES7521-1FH00-0AA0 |
6ES7521-1FH00-0AA0 SIEMENS SIMATIC S7-1500 digital input module DI 16x24VDC/125VAC BA
The Siemens 6ES7521-1FH00-0AA0 is a high-density 32-channel digital input (DI) module from the SIMATIC ET 200MP distributed I/O system, designed for reliable signal acquisition in industrial automation applications. Supporting both sinking (NPN) and sourcing (PNP) sensor wiring, this versatile module accepts standard 24 V DC signals from pushbuttons, limit switches, proximity sensors, photoelectric detectors, and other field devices—making it ideal for global deployment across diverse machine architectures.
Engineered for performance and ease of use, the 6ES7521-1FH00-0AA0 features two independent input groups of 16 channels each, allowing flexible power supply design and improved noise immunity. Each channel includes hardware-based signal filtering (adjustable via software) to suppress electrical noise and contact bounce, ensuring stable operation even in electrically noisy environments like motor drives or welding stations.
Product Overview: Siemens 6ES7521-1FH00-0AA0
| Manufacturer | Siemens AG – Digital Industries |
| Product Family | SIMATIC ET 200MP / S7-1500 Distributed I/O System |
| Order Number | 6ES7521-1FH00-0AA0 |
| Module Type | Digital Input (DI), 24 V DC, configurable for sink/source |
| Number of Inputs | 32 channels (2 groups × 16 channels) |
| Input Circuit Type | Electronic (optocoupler isolated), compatible with PNP and NPN sensors |
| Rated Input Voltage | 24 V DC (19.2–28.8 V) |
| Input "1" Signal Threshold | ≥ 15 V |
| Input "0" Signal Threshold | ≤ 5 V |
Product details pictures
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