SIMATIC S7-200 CN Expansion I/O
Sixteen 24 V DC sinking-sourcing inputs for compatible SIMATIC S7-22X controllers.
Siemens 6ES7221-1BH22-0XA8 is a SIMATIC S7-200 CN EM 221 digital input expansion module designed only for S7-22X CPUs. It provides sixteen 24 V DC sinking-sourcing digital inputs for connecting compatible field sensors and discrete signals. The compact module extends the input capacity of an existing S7-200 CN station where the CPU generation, expansion arrangement, wiring and approval requirements match the original engineering.
| Item | Verified Information |
|---|---|
| Manufacturer | Siemens |
| Complete Part Number | 6ES7221-1BH22-0XA8 |
| Product Type | SIMATIC S7-200 CN EM 221 Digital Input Module |
| Lifecycle Status | PM410:Product cancellation |
| PLM Effective Date | Product is cancelled since: 2021.10.01 |
| Manufacturer Note | Spare part |
| Parameter | 6ES7221-1BH22-0XA8 Specification |
|---|---|
| Module designation | EM 221 digital input module |
| Compatible CPU family | SIMATIC S7-22X CPU |
| Number of digital inputs | 16 |
| Input voltage | 24 V DC |
| Input characteristic | Sinking-sourcing |
| Input current at signal 1 | Typically 4 mA |
| Power loss | Typically 3 W |
| Dimensions | 71.2 x 80 x 62 mm |
| Net weight | 0.180 kg |
| Quantity unit | 1 piece |
| EAN | 4025515073352 |
| Approval note | S7-200 CN product; Siemens description states CE approval only |
The EM 221 expands a compatible S7-200 CN controller with sixteen additional discrete inputs. Typical uses include receiving signals from pushbuttons, limit switches, proximity sensors and machine status contacts in compact automation equipment. The installed CPU must be an S7-22X model and the field devices must suit the verified 24 V DC sinking-sourcing input arrangement.
Siemens identifies 6ES7221-1BH22-0XA8 as PM410:Product cancellation and states: Product is cancelled since: 2021.10.01. It is listed as a spare part. These manufacturer terms are retained without changing the lifecycle classification.
It is a SIMATIC S7-200 CN EM 221 expansion module providing sixteen digital inputs.
The Siemens product description specifies use only with SIMATIC S7-22X CPUs.
It provides sixteen 24 V DC digital inputs with sinking-sourcing characteristics.
Siemens states PM410:Product cancellation, with cancellation effective from 2021.10.01.
No. Confirm the full suffix, CPU family, channel count, input characteristic, connector and project configuration.
Verify the nameplate, S7-22X CPU, sensor wiring, field voltage, condition, availability, connector and warranty terms.
Contact Stockoems for availability verification, compatibility review, warranty terms and worldwide delivery coordination.
Practical procurement support for SIMATIC S7-200 CN replacement requirements.
For 6ES7221-1BH22-0XA8 enquiries, our team reviews the complete order number, visible nameplate, available condition and included accessories. Final compatibility depends on the installed S7-22X CPU, sensor wiring, field supply and project configuration.
Office CoordinationModel review, documentation preparation and commercial coordination by the Stockoems team. |
Visible Condition ReviewAvailable units can be checked for model identity, exterior condition and connector completeness. |
Packing and DispatchProtective handling and worldwide delivery coordination for industrial spare parts. |
Send the complete model and application details for availability and compatibility review.
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