6ES7221-1BH30-0XB0
SIMATIC S7-1200 SM 1221 16-Channel Digital Input Module · SM 1221 input module with sixteen 24 VDC sink/source channels and configurable input-delay filtering.
Lifecycle note: Use the unit nameplate and current official documentation as final references before approving a replacement.
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+86 15359408275SIMATIC S7-1200 SM 1221 16-Channel Digital Input Module · Siemens SIMATIC S7-1200 SM 1221
Siemens 6ES7221-1BH30-0XB0 is a SIMATIC S7-1200 SM 1221 module that adds sixteen 24 VDC sink/source digital input channels to the controller station.
The module operates from a documented 20.4-28.8 VDC range, draws up to 130 mA from the 5 V backplane and uses approximately 4 mA per active input at the rated condition.
Before replacement, preserve the hardware configuration and input-delay settings, then verify sensor polarity and type, field supply and commons, channel grouping, threshold behavior, wiring, diagnostics, grounding and the machine-safe test plan.
| Manufacturer | Siemens |
|---|---|
| Order number | 6ES7221-1BH30-0XB0 |
| Module designation | SM 1221 |
| Controller family | SIMATIC S7-1200 |
| Digital inputs | 16 |
| Input voltage | 24 VDC |
| Input type | Sink/source |
| Permissible supply range | 20.4-28.8 VDC |
| Backplane current at 5 VDC | 130 mA maximum |
| Typical input current | 4 mA per channel |
| Typical power loss | 2.5 W |
| Input characteristic | IEC 61131 Type 1 |
| Lifecycle status | Discontinued / spare-part reference |
Siemens 6ES7221-1BH30-0XB0 provides sixteen 24 VDC sink/source digital input channels for sensing configured switches, proximity devices and other binary field signals.
Siemens 6ES7221-1BH30-0XB0 uses a 24 VDC field supply with a documented permissible range of 20.4 to 28.8 VDC.
Each active Siemens 6ES7221-1BH30-0XB0 input draws approximately 4 mA under the documented rated condition, while the module can draw up to 130 mA from the 5 V backplane.
The configured input delay filters field transitions, so changing it on Siemens 6ES7221-1BH30-0XB0 can alter debounce behavior, event timing and the response of the control logic.
A 120 VAC input module cannot replace Siemens 6ES7221-1BH30-0XB0 because voltage, commons, thresholds, wiring and isolation requirements are different.
Commission Siemens 6ES7221-1BH30-0XB0 by actuating every field input and verifying terminal voltage, LED state, controller address, debounce response, diagnostics and safe machine behavior.
Provide the full Siemens 6ES7221-1BH30-0XB0 order number, hardware revision, sensor and polarity schedule, field supply, input-delay settings, quantity and destination.
Send the complete 6ES7221-1BH30-0XB0 catalog number, revision, quantity, destination and nameplate photo. Identification details will be checked before quotation.
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