6ES7221-3BD30-0XB0

SIMATIC S7-1200 SB 1221 4-Channel High-Speed Digital Input Board

SIMATIC S7-1200 SB 1221 4-Channel High-Speed Digital Input Board for adding four compact 24 v dc high-speed digital inputs directly to an s7-1200 cpu, supplied against the exact Siemens article number with installed-system compatibility checked before quotation.

BRANDSiemens

STOCK CONFIRMATIONIn Stock

CONDITIONBrand new and original

WARRANTY12 months

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Product overview

The Siemens 6ES7221-3BD30-0XB0 is a SIMATIC S7-1200 SB 1221 4-Channel High-Speed Digital Input Board used for adding four compact 24 v dc high-speed digital inputs directly to an s7-1200 cpu. Typical applications include high-speed sensor and pulse inputs and compact machine input expansion.

Selection must follow the complete Siemens article number rather than appearance alone. Before ordering, confirm 24 v dc input level and sensor output type, required pulse frequency and input filter, cpu model and available signal-board slot, tia portal hardware catalog and firmware.

COMMON APPLICATIONS

Installed-system context

High-speed sensor and pulse inputs
Compact machine input expansion
Encoder and event acquisition

Tell us the controller, communication network and installed panel details. That context helps prevent a visually similar but incompatible replacement.

VERIFIED MODEL DATA

Technical specifications

Official documentation: Siemens official product record

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Manufacturer: Siemens
Article number / MPN: 6ES7221-3BD30-0XB0
Product designation: SIMATIC S7-1200 SB 1221 4-Channel High-Speed Digital Input Board
Board type: SB 1221 digital input signal board
Input channels: 4 digital inputs
Input voltage: 24 V DC
Maximum input frequency: 200 kHz
Installation: Plugs into the supported S7-1200 CPU signal-board slot
System: SIMATIC S7-1200

Technical values are compiled from official Siemens product documentation for this exact article number. Always check the delivered unit nameplate and revision before installation.

What to send for verification

• Complete Siemens article number and nameplate
• 24 V DC input level and sensor output type
• required pulse frequency and input filter
• CPU model and available signal-board slot
• TIA Portal hardware catalog and firmware
• Required quantity, destination and condition

What your quotation will state

• Exact quoted article number
• New, surplus or refurbished condition
• Available quantity and estimated lead time
• Warranty and proposed shipping method

Active S7-1200 signal board — confirm CPU support, pulse characteristics, wiring and project release.

BUYER QUESTIONS

Frequently asked questions

What is the Siemens 6ES7221-3BD30-0XB0?

It is a SIMATIC S7-1200 SB 1221 4-Channel High-Speed Digital Input Board used for adding four compact 24 v dc high-speed digital inputs directly to an s7-1200 cpu.

What should be checked before ordering?

Confirm the full article number, then verify 24 v dc input level and sensor output type, required pulse frequency and input filter, cpu model and available signal-board slot.

Can a visually similar Siemens module be used instead?

Do not select by appearance alone. Hardware revision, firmware, signal type, interface, connector, rack and project compatibility can differ even when the housings look similar.

What information is needed for a quotation?

Send the complete article number, quantity, destination, required condition and a clear nameplate photo. We will confirm the quoted revision and lead time in writing.

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