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6ES7521-1FH00-0AA0 Siemens
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The 6ES7521-1FH00-0AA0 is a SIMATIC S7-1500 digital input module (SM 521 family) providing 16 AC input channels (230 V / 120 V AC, 50/60 Hz) arranged in groups of four. It is designed for integration into Siemens S7-1500 automation systems and communicates via the standard backplane bus. Typical uses include AC mains-level status monitoring, process control signal interfacing, and distributed input module deployment in manufacturing and infrastructure control systems. The module supports I&M data, prioritized startup, and is configurable via TIA Portal from version V12.
Best Suited For
- Integration into SIMATIC S7-1500 control system racks
- Monitoring 120/230 V AC process-level signals
- Distributed digital input applications
- Systems requiring prioritized startup and I&M data capabilities