Name: Siemens 6ES7221-3AD30-0XB0 / 6ES7222-1AD30-0XB0 | SIMATIC S7-1200 5V High-Speed Digital I/O Signal Boards
Brand: SIEMENS
SKU: 2927239
Price: 1 USD
Availability: InStock

Product Information

Siemens 6ES7221-3AD30-0XB0 and Siemens 6ES7222-1AD30-0XB0 are S7-1200 signal boards for 5 V DC high-speed digital work. The 3AD30 board provides four digital inputs, while the 1AD30 board provides four digital outputs.

The input board Siemens 6ES7221-3AD30-0XB0 accepts sourcing 5 V signals and reports four high-speed points to the CPU. The output board Siemens 6ES7222-1AD30-0XB0 uses four sourcing MOSFET channels for 5 V DC switching, so the two boards solve opposite sides of the signal path.

Both Siemens 6ES7221-3AD30-0XB0 and Siemens 6ES7222-1AD30-0XB0 use the S7-1200 signal-board position and require correct 5 V field wiring. Shielded cable, channel thresholds and the absence of output short-circuit protection are considered in the panel design.

Black and white 3D line drawing exterior view of Siemens 6ES7221-3AD30-0XB0 / 6ES7222-1AD30-0XB0

Product Specifications

Technical item6ES7221-3AD30-0XB06ES7222-1AD30-0XB0

Brand: Siemens
Model: 6ES7221-3AD30-0XB0; 6ES7222-1AD30-0XB0
Product Name: SB1221 4 DI 5 V DC 200 kHz; SB1222 4 DQ 5 V DC 200 kHz
Country: Germany
Signal Direction: Digital input; Digital output
Point Count: 4
Signal Voltage: 5 V DC
High-Speed Rating: 200 kHz
Backplane Current: 40 mA; 35 mA
Power Dissipation: 1 W; 0.5 W
Cable Limit: 50 m shielded
Output Protection: Not applicable; No short-circuit protection

Product Functions

Functional role

Siemens 6ES7221-3AD30-0XB0 and Siemens 6ES7222-1AD30-0XB0 form a compact high-speed 5 V signal pair for an S7-1200 CPU.

Input acquisition

The 3AD30 board receives four 5 V sourcing signals and places their states in the CPU input process image.

Output switching

The 1AD30 board drives four 5 V DC loads through sourcing MOSFET output channels.

Signal-board position

Both boards occupy the CPU signal-board location rather than a conventional right-side expansion slot.

Operating Characteristics

Operating behavior

The two Siemens boards share the 200 kHz family rating but have different electrical duties and current values.

Threshold behavior

The input board uses 5 V threshold levels and configurable delay for the incoming signal.

Solid-state output

The output board changes state electronically, with high-speed transitions suited to 5 V DC loads.

Protection boundary

The output board does not provide short-circuit protection, so the field circuit must supply it externally.

Questions & Answers

Why does Siemens 6ES7221-3AD30-0XB0 not detect a 24 V sensor?

Siemens 6ES7221-3AD30-0XB0 is a 5 V DC input board. A 24 V sensor must not be connected as though it were the compatible 5 V sourcing signal; use the correct interface or signal conversion.

What load can Siemens 6ES7222-1AD30-0XB0 switch?

Siemens 6ES7222-1AD30-0XB0 is a four-channel 5 V DC sourcing MOSFET board. Confirm the load voltage, current, return path and external protection before connecting a field device.

Why can Siemens 6ES7221-3AD30-0XB0 show unstable high-speed input states?

Check the 5 V source, shield termination, threshold wiring and cable length for Siemens 6ES7221-3AD30-0XB0. A signal outside the input threshold or a noisy 50 m cable can produce transitions that are not valid machine events.

Does Siemens 6ES7222-1AD30-0XB0 protect against a shorted load?

Siemens 6ES7222-1AD30-0XB0 does not provide short-circuit protection on its output channels. Add field-side protection and verify the load wiring before energizing the board.

Can Siemens 6ES7221-3AD30-0XB0 and 6ES7222-1AD30-0XB0 share one signal-board plan?

They can be planned in the same S7-1200 project only when the CPU signal-board position and the required signal direction are respected. Siemens 6ES7221-3AD30-0XB0 is input-side; Siemens 6ES7222-1AD30-0XB0 is output-side.

What should be checked after changing from Siemens 6ES7221-3AD30-0XB0 to 6ES7222-1AD30-0XB0?

Recheck the project hardware, point direction, terminal wiring, load supply and address map. The two Siemens order numbers have the same four-point family role but opposite field signal direction.

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Siemens 6ES7221-3AD30-0XB0 / 6ES7222-1AD30-0XB0 | SIMATIC S7-1200 5V High-Speed Digital I/O Signal Boards Item NO.: 2927239

Siemens 6ES7221-3AD30-0XB0 / 6ES7222-1AD30-0XB0 | SIMATIC S7-1200 5V High-Speed Digital I/O Signal Boards