Siemens 6ES7521-1BL10-0AA0 SIMATIC S7-1500 32Ch Digital Input Module DI32×24VDC

Siemens 6ES7521-1BL10-0AA0 SIMATIC S7-1500 32Ch Digital Input Module DI32×24VDC

Product Overview
The Siemens 6ES7521-1BL10-0AA0 is a cost-optimized 32-channel digital input module for the SIMATIC S7-1500 family.  Designed for high-density machine and process I/O, it accepts 24 V DC sinking or sourcing sensors, delivers 0.5 ms filter time for fast counting, and mounts in a 25 mm slim housing that saves panel space.  Push-in front connectors reduce wiring time by 50 %, while integrated diagnostics and LED channel status simplify commissioning and maintenance.

Key Features & Benefits
• 32 DI channels – mix sinking or sourcing sensors in one slot
• 24 V DC nominal (11…30 V) – wide tolerance for industrial supplies
• 0.5 ms configurable filter – high-speed counting or interlocking
• 25 mm slim housing – up to 64 channels in only 50 mm DIN-rail width
• Push-in spring terminals – tool-free wiring, vibration-proof
• Green/red channel LEDs – instant visual diagnostics
• Hot-swap capable – exchange module without rack power-down
• Diagnostic alarm: wire-break, short-circuit, overload
• UL 508, CE, ATEX Zone 2, marine approvals – global acceptance

Typical Applications
• Packaging machine sensor arrays
• Conveyor photo-eye banks
• Water-treatment valve position feedback
• Robot I/O islands

Technical Specifications
Order No.: 6ES7521-1BL10-0AA0
Module Type: S7-1500 DI 32×24 V DC BA
Channels: 32 digital inputs, isolated in groups of 8
Input Voltage: 24 V DC (11…30 V DC)
Input Current: 2.5 mA typ @ 24 V (type 3)
Filter Time: 0.5 ms (factory), 3 ms, 10 ms, 20 ms configurable
Backplane Bus: 5 V DC / 100 mA typ
Power Loss: 4 W max
Diagnostics: Channel & module level alarms
Front Connector: Push-in, 40-pin (order 6ES7590-5AA00-0AA0)
Operating Temperature: 0 °C…+60 °C

Product Pictures

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