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| Place of Origin: | U.K. |
| Brand Name: | Siemens |
| Certification: | COO & COC |
| Model Number: | 6ES7521-1BH00-0AB0 |
6ES7521-1BH00-0AB0 SIEMENS SIMATIC S7-1500 Digital input module DI 16x24VDC BA
The Siemens 6ES7521-1BH00-0AB0 is a compact and highly reliable 16-channel digital input (DI) module from the SIMATIC ET 200MP distributed I/O system, engineered for efficient signal acquisition in industrial automation applications. Designed to work with both sinking (NPN) and sourcing (PNP) 24 V DC sensors without hardware changes, this versatile module seamlessly connects to standard field devices such as proximity switches, limit switches, photoelectric sensors, pushbuttons, and safety interlocks—making it ideal for global deployment across diverse machine architectures.
Featuring a single group of 16 inputs, the 6ES7521-1BH00-0AB0 delivers an optimal balance of performance, simplicity, and cost-effectiveness. Each channel includes hardware-based input filtering with a fixed 3 ms delay, effectively suppressing electrical noise and contact bounce—ensuring stable operation even in electrically noisy environments like those with motors, drives, or welding equipment.
Product Overview: Siemens 6ES7521-1BH00-0AB0
| Manufacturer | Siemens AG – Digital Industries |
| Product Family | SIMATIC ET 200MP / S7-1500 Distributed I/O System |
| Order Number | 6ES7521-1BH00-0AB0 |
| Module Type | Digital Input (DI), 24 V DC, universal (PNP/NPN compatible) |
| Number of Inputs | 16 channels (1 group) |
| Input Circuit Type | Optocoupler-isolated, compatible with sinking and sourcing sensors |
| Rated Input Voltage | 24 V DC (19.2–28.8 V) |
Product details pictures
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