SIEMENS 6ES7421‑1BL01‑0AA0 S7‑400 SM421 DI 32x24VDC Digital Input Module USED

• 32-channel digital input module for SIMATIC S7-400 racks
• Designed for 24 VDC signal acquisition with isolated DI channels
• Compatible with high-density input architectures on SM421 series
• Handles industrial-grade signal transitions with stable performance
• Suitable for demanding environments requiring reliable PLC input processing

• Factory automation and manufacturing systems
• High-density sensor input acquisition
• Machine control and process automation panels
• OEM equipment requiring reliable digital input performance
• Distributed S7-400 PLC architectures with large I/O counts

6ES7421-1BL00-0AA0
6ES7421-1BL02-0AA0
SM421 32DI 24VDC Series
Siemens 421-BL Digital Input Variants
S7-400 DI High-Density Modules

6ES7-4211BL01-0AA0
6ES74211BL01OAA0
SM421 32x24V Module
Siemens 421-BL01
6ES7421-BL01-0AA0