Siemens SIMATIC S7-1200 SB 1221 Signal Board (6ES7221-3AD30-0XB0)

Siemens SIMATIC S7-1200 SB 1221 Signal Board

Part Number: 6ES7221-3AD30-0XB0

The Siemens SB 1221 Signal Board is a compact expansion module designed to extend digital input or output capacity of S7-1200 CPUs without requiring a full-size signal module.

It is directly mounted on the CPU, making it ideal for applications where space is limited and only a small number of additional signals are required.

Key Features

• Direct CPU-mounted expansion board
• Minimal footprint design
• Additional digital I/O channels
• Full integration with TIA Portal

Applications

• Small machine upgrades
• Compact control panels
• Cost-sensitive expansions
• Limited I/O enhancement projects