⚡ Siemens 6ES7-321-1BL00-0AA0 SM321 Digital Input Module 32DI 24V | Used

🔌 Durable Siemens SM321 Digital Input Module – tested, reliable, ready for your automation system.

✅ Key Features & Specs

🏷 Brand: Siemens

🔢 Model / Part: 6ES7-321-1BL00-0AA0 (SM 321 series)

📥 Type: Digital Input Module

🔢 Inputs: 32 channels / 32 DI

⚡ Voltage: 24 V DC (rated)
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🔒 Isolation: Inputs isolated (in groups)
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📐 Dimensions / Weight: ~ 40 × 125 × 120 mm, ~ 260 g
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⚙️ Power Loss: ≈ 6.5 W (typical)
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⏱ Input delay: ~1.2 to 4.8 ms transitions “0→1” or “1→0”
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📏 Cable length limits: max ~600 m unshielded, ~1000 m shielded
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📦 Condition

♻️ Used / pre-owned

✅ Fully functional & tested

✨ Minor signs of wear from industrial use; please inspect photos

🧼 Cleaned and checked; original Siemens label intact

⭐ Why Choose This Module?

🧩 Designed for Siemens S7-300 PLC systems

🏭 Ideal for automation, process control, machine I/O expansion

💲 Offers cost savings compared to buying a brand-new OEM unit

🔄 Compatible with other Siemens I/O modules (SM series architecture)