Siemens SIMATIC S7‑1200 – SM 1221 DC (6ES7 221‑1BH32‑0XB0)
Digital input module for SIMATIC S7‑1200 controllers. This module adds 8 digital 24 VDC inputs to a CPU, making it ideal for compact machines, conveyor stations, OEM cells, or equipment requiring a simple and reliable expansion of input signals.
Siemens SIMATIC S7‑1200 – SM 1221 DC (6ES7 221‑1BH32‑0XB0)
Digital input module for SIMATIC S7‑1200 controllers. This module adds 8 digital 24 VDC inputs to a CPU, making it ideal for compact machines, conveyor stations, OEM cells, or equipment requiring a simple and reliable expansion of input signals. Suitable for standard industrial environments and modular S7‑1200 architectures.
Main Features
- Brand: Siemens
- Series: SIMATIC S7‑1200
- Model: SM 1221 DC
- Manufacturer reference: 6ES7 221‑1BH32‑0XB0
- Type: Digital input module (DI)
- Power supply: 24 VDC
- Digital Inputs (DI): 8 × 24 VDC
- Input type: NPN compatible (handwritten note on the module)
- Diagnostics: Front‑panel DIAG indicator
- Maximum temperature: 60°C (depending on mounting orientation)
Condition
- Module in excellent condition
- Suitable for immediate installation
Applications
- Input expansion for compact machines
- Conveyors, sorting stations, transfer modules
- Packaging or dosing machines
- OEM cells requiring additional input signals
- Simple or repetitive industrial processes
- Integration into modular S7‑1200 architectures
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