6ES7221-3BD30-0XB0

FAQS

• What is Siemens 6ES7221-3BD30-0XB0?
  The Siemens 6ES7221-3BD30-0XB0 is a SIMATIC S7-1200 SB 1221 signal board with four 24 V DC sourcing digital inputs rated for input frequencies up to 200 kHz.
• What does 6ES7221-3BD30-0XB0 do in its Siemens system?
  It reads four high-speed sourcing input signals directly at a compatible S7-1200 CPU and transfers their states or pulse transitions to the user program. It is paired with suitable 24 V DC sensors, CPU signal-board support, TIA Portal configuration, and high-speed wiring for counters, encoders, proximity switches, and machine events.
• Which signals or interfaces are documented for 6ES7221-3BD30-0XB0?
  Digital inputs: 4; Input voltage: 24 V DC; Input circuit: Sourcing input; Maximum published input frequency: 200 kHz.
• Which components are compatible with 6ES7221-3BD30-0XB0?
  SIMATIC S7-1200 CPU that supports the SB 1221 signal board 24 V DC sourcing sensors or pulse sources matching the Siemens input circuit TIA Portal hardware configuration and high-speed counter assignment for the CPU Short, shielded, and grounded high-speed signal wiring where required by Siemens.
• Where is 6ES7221-3BD30-0XB0 typically applied?
  High-speed pulse capture: Reads encoder or sensor transitions up to the published frequency Machine event detection: Adds four fast 24 V input points without a separate signal module Counting and positioning: Supplies pulse trains to configured S7-1200 counter functions Compact equipment control: Expands a supported CPU within its signal-board footprint.
• What are the official weight and dimensions for 6ES7221-3BD30-0XB0?
  6ES7221-3BD30-0XB0 has a published net weight of 0.030 kg and 5.0 x 8.0 x 2.9 cm (Siemens packaging).
• What is the lifecycle status of 6ES7221-3BD30-0XB0?
  Siemens lists 6ES7221-3BD30-0XB0 as PM300 active, with product phase-out scheduled from 1 November 2026.
• What must be checked before installing 6ES7221-3BD30-0XB0?
  CPU support: Confirm the exact S7-1200 CPU hardware and signal-board slot compatibility Input type: Use only the documented 24 V DC sourcing circuit and observe terminal polarity High-speed wiring: Control cable length, shielding, grounding, noise, and edge quality TIA Portal: Assign channels, filters, counters, and interrupt behavior in the approved project Commissioning: Test each input at operating speed and confirm no false counts or missed pulses.