6ES7321-1BH50-0AA0 New Original Siemens S7-300 Plc Programming Controller module

2. Key Selling Points

1. High-Performance Digital Input Module for S7-300 Series: Model SM 321 DI 32x24VDC, a high-density signal module in the SIMATIC S7-300 PLC system—provides 32 channels of 24 V DC digital inputs in a single module, ideal for automation systems requiring large-scale discrete signal acquisition.

2. Cost-Effective Solution: Reduces the number of modules and wiring complexity compared to using multiple 16-channel modules—lowering installation, maintenance, and overall system costs. An ideal choice for large-scale automation systems.

3. Plug-and-Play & Seamless STEP 7 Integration:Supports automatic module recognition and hardware configuration—no additional tools required.Fully compatible with Siemens STEP 7 engineering software for online commissioning, parameterization, and firmware updates—improving engineering efficiency.

4. Advanced Diagnostic Capabilities:Supports broken wire detection on the common return line (M-wire) for each 8-channel group.LED indicators show RUN, ERROR, and 24 V DC power status.Diagnostic data accessible via STEP 7 software for remote monitoring and rapid troubleshooting.

5. Wide Input Voltage Range:Operates from 20.4 V to 28.8 V DC, accommodating voltage fluctuations in industrial environments for stable and reliable signal detection.