SIMATIC S7-400 DIGITAL INPUT MODULE 32 DI 24VDC

The SIEMENS 6ES7421-1BL01-0AA0 is a SIMATIC S7-400 digital input module that provides 32 isolated discrete inputs for 24 V DC systems. Designed for industrial control racks, it organizes and isolates signals to help protect the PLC rack from ground loops and electrical noise while keeping wiring straightforward. Use it to gather status and sensor signals from machinery, switches, and field devices in production, process, or infrastructure applications. Its 32-channel configuration simplifies I/O layouts and makes expanding or replacing input capacity in an S7-400 installation quick and predictable.

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