SIEMENS 216-2AD23-0XB0

That’s a heavy-duty classic from the Siemens S7-200 series! Specifically, the CPU 216 is the “big brother” of that family, offering way more memory and ports than the smaller 212 or 214 models.

Here is the breakdown for your inventory:

⚙️ Technical Specifications

• Series: SIMATIC S7-200, CPU 216.

• I/O Count: 24 Digital Inputs / 16 Digital Outputs (Relay).

• Power Supply: 85–264V AC.

• Dual Ports: It features two RS-485 (PPI) communication ports. This is a huge selling point because you can connect an HMI to one port and a programming PC (or another PLC) to the other simultaneously.

• User Memory: 8 KB program memory and 5 KB data memory—significantly higher than other S7-200 CPUs.

🛠️ Why This is “Surplus Gold”

• High Demand for Repairs: The S7-200 series is discontinued (replaced by the S7-1200), so factories and ships with older panels are desperate for these exact part numbers to avoid a total system redesign.

• Marine Ready: These are incredibly common in shipboard automation (ballast control, engine monitoring) found in the Alang/Bhavnagar region.

• Reliability: The “Relay” output version (2AD23) is preferred for older systems because it can handle varied voltage loads without needing extra interface relays.