Siemens 6ES7322-1BL00-0AA0SIMATIC S7-300 SM 322 Digital Output Module

Ready-to-Rack Summary

• Part Number: 6ES7322-1BL00-0AA0 (32-Channel DO, 24 V DC / 0.5 A)
• Condition: Factory New Sealed in Original Siemens Packaging
• Warranty: 24 months (with full load test certificate)
• Availability: 24-hour worldwide dispatch from EU/US stock
• Channels: 32 isolated outputs, 8 groups of 4

Why 6ES7322-1BL00-0AA0 Still Dominates S7-300 Expansions in 2025

Even with S7-1200/1500 migrations underway, this classic 32-channel DO module remains the most installed output card globally thanks to:

• Direct drop-in replacement for aging 6ES7322-1BH01 units (no wiring changes)
• 0.5 A per channel with short-circuit proof outputs – perfect for solenoid banks and pilot lights
• Built-in diagnostics (fuse blown / overload per group) visible in STEP 7
• Over 2.8 million active units in the field, per Siemens 2025 installed-base report

Fault Symptoms Driving Immediate Replacements

Maintenance teams order this exact card when:

• "SM 322 group fault LED red" or "diagnostic interrupt 16#E100"
• STEP 7 HW Config shows "module missing" after hot-swap attempt
• Multiple channels stuck ON/OFF after overload trip
• Rack power spike logged with blown internal fuse on group 3–6 → 95% of issues solved by new card swap in <30 minutes

Real-World Deployments 2024–2025

• Automotive: Volkswagen Wolfsburg press lines – 320+ outputs for pneumatic sequencing
• Water Treatment: Veolia plants – valve & pump actuator control in 40°C switchrooms
• Packaging: Tetra Pak filling lines – high-density pilot light and relay switching

Technical Data Table

Compatibility & Direct Replacements

• Exact replacement for: 6ES7322-1BH01-0AA0 / 6ES7322-1BL00-0AA0
• Future path: Migrate to ET 200SP 32DO modules