Procurement teams shortlist 6ES7521-1BL10-0AA0 with Schneider PLC, Siemens HMI and 6Es7 215 1Ag40 0Xb0, aligning budget approvals, warranty terms, and multisite availability for smoother rollout across plants.
Siemens 6ES7521-1BL10-0AA0 Programmable Logic Controller
6ES7521-1BL10-0AA0 - Siemens PLC

| Brand | Siemens |
| Product Type | Programmable Logic Controller |
| Product | 6ES7521-1BL10-0AA0 |
Siemens 6ES7521-1BL10-0AA0 Programmable Logic Controller - Technical Specifications
| Specification | Value |
|---|---|
| Product Description | SIMATIC S7-1500 Digital input module, DI 32x24 V DC BA, 32 channels in groups of 16, Input delay typ. 3.2 ms, Input type 3 (IEC 61131); Delivery incl. front connector Push-in |
| Product family | SM 521 digital input modules |
| Product Lifecycle (PLM) | PM300:Active Product |
| PLM Effective Date | 219 / 219 |
| Region Specific PriceGroup / Headquarter Price Group | Show prices |
| Metal Factor | AL : N / ECCN : N |
| Net Weight (kg) | 15,10 x 20,30 x 3,70 |
| Packaging Dimension | CM |
| Package size unit of measure | 1 Piece |
The Siemens 6ES7521-1BL10-0AA0 is a robust PLC (Programmable Logic Controller) module from the Siemens SIMATIC S7-1500 series. Designed to handle fast and reliable digital input processing, it is trusted by engineers, system integrators, and OEMs for building efficient and scalable automation systems.
The 6ES7521-1BL10-0AA0 is part of the SM 521 digital input module family and provides 32 digital input channels (24 V DC) organized in groups of 16. With a typical input delay of 3.2 ms and compliance with IEC 61131 input type 3, it ensures reliable and accurate signal acquisition. The module comes complete with a push-in front connector, making installation and wiring simple and efficient. Compact in design at 15.10 Γ 20.30 Γ 3.70 cm, it fits seamlessly into SIMATIC S7-1500 racks, saving space while maintaining high performance.
Backed by the PM300: Active Product Lifecycle classification, the Siemens 6ES7521-1BL10-0AA0 PLC guarantees long-term availability, firmware updates, and Siemensβ worldwide support. Its advanced diagnostics and reliable build quality ensure reduced downtime and increased system availability in industrial environments. Built on Siemensβ proven engineering excellence, the 6ES7521-1BL10-0AA0 is a trusted choice for modern automation projects.




