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Siemens SIMATIC S7-1200 SB1222 222-1BD30-0XB0 Digital Output Board

A four-channel 24 VDC, high-speed digital output signal board for a SIMATIC S7-1200 CPU.

System role

Rebuilt from individual evidence

Documented facts

Evidence limits

Siemens TIA documentation identifies this exact reference as an SB1222 output board.

The Siemens data sheet describes four 24 VDC digital outputs with MOSFET source and sink capability, 0.1 A output current and high-speed operation up to 200 kHz.

This signal board switches four 24 VDC digital output channels from the S7-1200 control system.

Unknown: installation-specific compatibility, firmware, wiring and unit condition.

Exact reference
222-1BD30-0XB0
Category
PLC / CPU
Evidence checked
2026-09-11

System role

This section explains what the product does and where it acts in the surrounding system.

Function
This signal board switches four 24 VDC digital output channels from the S7-1200 control system.
System position
It sits between upstream control or power and the downstream machine or network within the S7-1200 CPU signal-board output position.
Upstream / inputs
It receives output states from the S7-1200 CPU control program.
Downstream / outputs
It sends 24 VDC source or sink signals to connected field devices.
Limitations
Unknown: installation-specific compatibility, firmware, wiring and unit condition.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

Inferences

  • This signal board switches four 24 VDC digital output channels from the S7-1200 control system.

    Confidence: high

    Rationale: The source-backed identity and technical specification support the stated function and system position.

Unknowns

  • Unknown: installation-specific compatibility, firmware, wiring and unit condition.

    Confidence: low

    Missing evidence: A unit-specific inspection and complete installation record are not present in the captured sources.

System position diagram

Diagram showing 222-1BD30-0XB0 between upstream control or power and downstream machine or network.

Reading limit: system position only, not a wiring or safety drawing.

System path showing where 222-1BD30-0XB0 receives inputs and sends controlled outputs.

Enlarged system diagram

Diagram showing 222-1BD30-0XB0 between upstream control or power and downstream machine or network.

System path showing where 222-1BD30-0XB0 receives inputs and sends controlled outputs.

View Mermaid source
flowchart LR\n  upstream[Upstream control or power] --> product[222-1BD30-0XB0]\n  product --> downstream[Machine or network]
View diagram labels
Nodes
Upstream control or power; 222-1BD30-0XB0; Machine or network
Edges
Upstream command or power path; Controlled output or status path

Next action

The captured evidence supports this exact reference as a documented industrial component in the stated system role.

Verify host compatibility, wiring, firmware and unit condition before installation.

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