Siemens 6ES7221-3BD30-0XB0 (SB 1221): Digital input SB 1221, 4 DI, 24 V DC 200 kHz, Sourcing input.
Signal and communication boards plug into the front of the S7-1200 CPU, adding a few channels or an interface without increasing the width of the controller. Each CPU takes one board.
See our SIMATIC S7-1200 range and the Siemens order number guide (Arabic).
Technical data
| Siemens order number | 6ES7221-3BD30-0XB0 |
|---|---|
| Product type designation | SB 1221, DI 4×24 V DC 200 kHz |
| Digital inputs | 4; Current-sourcing |
| Input delay | Yes; 0.1 / 0.2 / 0.4 / 0.8 / 1.6 / 3.2 / 6.4 / 10.0 / 12.8 / 20.0 μs; 0.05 / 0.1 / 0.2 / |
| Power loss, typ. | 1W |
| Ambient temperature (operation) | -20 °C … 60 °C (horizontal installation) |
| Dimensions (W x H x D) | 38 x 62 x 21 mm |
| Weight, approx. | 0.035 kg |
| Condition | New, original Siemens |
Key features (per Siemens)
- Digital input SB 1221
- 4 DI
- 24 V DC 200 kHz
- Sourcing input
Typical applications
- Replacing a failed module of the same order number
- Fast inputs and outputs for encoders and pulse trains
- Extending S7-1200 machines with extra I/O or interfaces
Compatibility and replacement
Fits all S7-1200 CPUs (CPU 1211C to 1217C) within the limits given by Siemens for the number of boards and modules per CPU.
Before you replace it
- Look for signs of overvoltage, water or heat damage in the cabinet so the new part does not fail for the same reason.
- Back up the program and parameters from the old device if it still runs.
- Check the supply voltage and wiring of the old unit before installing the new one.
Frequently asked questions
Which CPUs support it?
All SIMATIC S7-1200 CPUs, within the module limits of each CPU.
Is it configured in TIA Portal?
Yes, it is added to the device configuration of the CPU in TIA Portal.
Can I get a price and delivery time?
Prices are quoted on request. Send the order number, quantity and delivery country on WhatsApp and we will reply with price and delivery time; air shipping is usually 5 to 7 days once ready, with a 1-year warranty.
Ordering tips
Send us the full order number from the label of the old part, or a clear photo of the label, together with the quantity you need. We check the number against the current manufacturer data before we quote and tell you if there is a newer replacement.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the order number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
