• Siemens SIMATIC S7-1200 G2 Digital Signal Boards SB 1221/1222/1223
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Siemens SIMATIC S7-1200 G2 Digital Signal Boards SB 1221/1222/1223

Siemens SIMATIC S7-1200 G2 Digital Signal Boards SB 1221/1222/1223

Plug-in digital signal boards that add fast inputs/outputs directly in the front slot of an S7-1200 G2 CPU without increasing its width.

Key features

  • Plugged directly into the CPU board slot
  • SB 1221: 8 DI 24 V DC, 100 kHz
  • SB 1222: 8 DQ 24 V DC 0.1 A transistor, 100 kHz
  • SB 1223: 4 DI/4 DQ, 5 V DC 200 kHz or 24 V DC 100 kHz
  • Supplement the integral I/O of the S7-1200 G2 CPUs

Specifications

Series SIMATIC S7-1200 G2
Module type Signal board (SB)
Mounting CPU board slot
Source Siemens Catalog ST 70 · 2026, p. 422-437
6ES7221-3BF50-0XB0 Board: SB 1221 | I/O: 8 DI | Voltage: 24 V DC sink/source | Frequency: 100 kHz
6ES7222-5BF50-0XB0 Board: SB 1222 | I/O: 8 DQ 0.1 A transistor | Voltage: 24 V DC | Frequency: 100 kHz
6ES7223-7AF50-0XB0 Board: SB 1223 | I/O: 4 DI / 4 DQ 0.1 A | Voltage: 5 V DC | Frequency: 200 kHz
6ES7223-7BF50-0XB0 Board: SB 1223 | I/O: 4 DI / 4 DQ 0.1 A | Voltage: 24 V DC | Frequency: 100 kHz
PLC I/O ModulesSiemens
4 product codes available in this family
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Siemens SIMATIC S7-1200 G2 Digital Signal Boards SB 1221/1222/1223

Brand Siemens·PLC I/O Modules

Available part numbers (4)

6ES7221-3BF50-0XB0, 6ES7222-5BF50-0XB0, 6ES7223-7AF50-0XB0, 6ES7223-7BF50-0XB0

How to order

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Product codes & specifications
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Product codeSpec
6ES7221-3BF50-0XB0Board: SB 1221 | I/O: 8 DI | Voltage: 24 V DC sink/source | Frequency: 100 kHz
6ES7222-5BF50-0XB0Board: SB 1222 | I/O: 8 DQ 0.1 A transistor | Voltage: 24 V DC | Frequency: 100 kHz
6ES7223-7AF50-0XB0Board: SB 1223 | I/O: 4 DI / 4 DQ 0.1 A | Voltage: 5 V DC | Frequency: 200 kHz
6ES7223-7BF50-0XB0Board: SB 1223 | I/O: 4 DI / 4 DQ 0.1 A | Voltage: 24 V DC | Frequency: 100 kHz

Need a different model, or a part not listed here? Send us your parts list →

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