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Siemens SIMATIC S7-300 · Digital Input Module

Siemens 6ES73211BH020AA0

Normal sale of the 6ES73211BH020AA0 has ended. Spares may still be available, but the clock is running.

  1. Active RolloutSold and supported normally
  2. Phase OutRetirement announced, still orderable
  3. CancellationNormal sale ended, spares may remain
  4. Total DiscontinuationNo manufacturer supply or repair

ECS stage: Cancellation.

Is the Siemens 6ES73211BH020AA0 discontinued?

On ECS's lifecycle assessment, the 6ES73211BH020AA0 has been cancelled: no longer sold as a current product, though spares may remain available for a period.

Source: ECS lifecycle assessment, based on ECS's internal lifecycle data in Command Centre. Last checked . Always confirm a specific part's status with the manufacturer before buying or planning a migration.

What Cancellation means for you

You can no longer order it as a normal product, and nothing new should be designed around it. If machines depend on it, you want spare stock you can rely on and a migration plan. Both start with knowing how many you run.

How ECS defines Cancellation · all four lifecycle stages

Before replacing an input module

For an input module we would record the field voltage, sink/source arrangement, commons, channel allocation and PLC addresses before considering an alternative.

Modern I/O can accept the same nominal signals but use different terminal layouts, isolation groups or addressing, which means a small module change can create wiring and software work. Photographing the terminations and exporting the I/O configuration now can save a lot of diagnosis during a breakdown.

ECS engineering guidance

6ES73211BH020AA0 part details

Manufacturer
Siemens
Range
SIMATIC S7-300
Name
16DI SM 321
Summary
SIMATIC S7-300, Digital input SM 321, isolated, 16 DI, 24 V DC, 1x 20-pole

Common questions about the 6ES73211BH020AA0

Is the Siemens 6ES73211BH020AA0 discontinued?

On ECS's lifecycle assessment, the 6ES73211BH020AA0 has been cancelled: no longer sold as a current product, though spares may remain available for a period.

Can I still buy a 6ES73211BH020AA0?

Not as a normal new product. Remaining distributor stock or designated spares may still be available. Buy any you need now.

An ECS engineer capturing a control panel on a tablet: PLC, drive and power supply identified and synced to Command Centre

Know where every unit is before one fails.

A Capture audit finds every 6ES73211BH020AA0 on your site, photographs it where it sits and checks it against manufacturer lifecycle status, so you know your exposure and where your spares are before a failure stops a line.

  • Every device located, photographed and lifecycle-checked
  • Findings report, plus a populated Command Centre
  • No production downtime
See how Capture works

Other SIMATIC S7-300 parts

All Siemens parts · All manufacturers