• Siemens SIMATIC S7-1200 G2 Digital Signal Modules SM 1221/1222/1223
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Siemens SIMATIC S7-1200 G2 Digital Signal Modules SM 1221/1222/1223

Siemens SIMATIC S7-1200 G2 Digital Signal Modules SM 1221/1222/1223

Digital input, output and input/output signal modules for expanding the I/O of SIMATIC S7-1200 G2 CPUs.

Key features

  • SM 1221: 16 digital inputs 24 V DC sink/source
  • SM 1222: 16 digital outputs, transistor 0.5 A or relay 2 A
  • SM 1223: 8 DI/8 DO or 16 DI/16 DO, transistor (PNP/NPN) or relay
  • Mounted to the right of the CPU on the DIN rail
  • Configured in STEP 7 (TIA Portal)

Specifications

Series SIMATIC S7-1200 G2
Module type Digital signal module (SM)
Input voltage 24 V DC
Source Siemens Catalog ST 70 · 2026, p. 420-434
6ES7221-1BH50-0XB0 Module: SM 1221 | Inputs: 16 DI 24 V DC sink/source | Outputs: -
6ES7222-5BH50-0XB0 Module: SM 1222 | Inputs: - | Outputs: 16 DO 24 V DC 0.5 A sourcing
6ES7222-5HH50-0XB0 Module: SM 1222 | Inputs: - | Outputs: 16 DO relay 2 A
6ES7223-5BH50-0XB0 Module: SM 1223 | Inputs: 8 DI 24 V DC sink/source | Outputs: 8 DO 24 V DC 0.5 A sourcing
6ES7223-5PH50-0XB0 Module: SM 1223 | Inputs: 8 DI 24 V DC sink/source | Outputs: 8 DO relay 2 A
6ES7223-5BL50-0XB0 Module: SM 1223 | Inputs: 16 DI 24 V DC sink/source | Outputs: 16 DO PNP transistor 0.5 A
6ES7223-5BL50-1XB0 Module: SM 1223 | Inputs: 16 DI 24 V DC sink/source | Outputs: 16 DO NPN transistor 0.5 A
6ES7223-5PL50-0XB0 Module: SM 1223 | Inputs: 16 DI 24 V DC sink/source | Outputs: 16 DO relay 2 A
PLC I/O ModulesSiemens
8 product codes available in this family
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Siemens SIMATIC S7-1200 G2 Digital Signal Modules SM 1221/1222/1223

Brand Siemens·PLC I/O Modules

Available part numbers (8)

6ES7221-1BH50-0XB0, 6ES7222-5BH50-0XB0, 6ES7222-5HH50-0XB0, 6ES7223-5BH50-0XB0, 6ES7223-5PH50-0XB0, 6ES7223-5BL50-0XB0, 6ES7223-5BL50-1XB0, 6ES7223-5PL50-0XB0

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Product codes & specifications
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Product codeSpec
6ES7221-1BH50-0XB0Module: SM 1221 | Inputs: 16 DI 24 V DC sink/source | Outputs: -
6ES7222-5BH50-0XB0Module: SM 1222 | Inputs: - | Outputs: 16 DO 24 V DC 0.5 A sourcing
6ES7222-5HH50-0XB0Module: SM 1222 | Inputs: - | Outputs: 16 DO relay 2 A
6ES7223-5BH50-0XB0Module: SM 1223 | Inputs: 8 DI 24 V DC sink/source | Outputs: 8 DO 24 V DC 0.5 A sourcing
6ES7223-5PH50-0XB0Module: SM 1223 | Inputs: 8 DI 24 V DC sink/source | Outputs: 8 DO relay 2 A
6ES7223-5BL50-0XB0Module: SM 1223 | Inputs: 16 DI 24 V DC sink/source | Outputs: 16 DO PNP transistor 0.5 A
6ES7223-5BL50-1XB0Module: SM 1223 | Inputs: 16 DI 24 V DC sink/source | Outputs: 16 DO NPN transistor 0.5 A
6ES7223-5PL50-0XB0Module: SM 1223 | Inputs: 16 DI 24 V DC sink/source | Outputs: 16 DO relay 2 A

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

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