Siemens 6AG1221-3BD30-5XB0 – SIPLUS S7-1200 SB 1221 4DI 24VDC
Siemens 6AG1221-3BD30-5XB0 – SIPLUS S7-1200 SB 1221 4DI 24VDC from the SIPLUS SB 1221 digital input modules range. Status: active in the manufacturer's range. Van Haelen supplies it refurbished or new in sealed factory packaging, with a 24-month warranty.
Also written as: 6AG1 221-3BD30-5XB0, 6AG12213BD305XB0
The Siemens 6AG1221-3BD30-5XB0 is a S7-1200/1500 control component from the SIPLUS SB 1221 digital input modules range. Manufacturer type designation: SIPLUS S7-1200 SB 1221 4DI 24VDC. Status: active in the manufacturer's product range. Key data: weight 0.03 kg, HS code 85389091. When replacing, check the product version (issue) on the rating plate; for most installations the same or a higher issue is suitable. Ask us about exchange, repair and a spare-parts pool for your installation.
Available as
Product data
| Manufacturer | Siemens |
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| Part number | 6AG1221-3BD30-5XB0 |
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| Type designation | SIPLUS S7-1200 SB 1221 4DI 24VDC |
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| Series | SIPLUS SB 1221 digital input modules |
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| Manufacturer status | active in the manufacturer's range |
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| ETIM | EC001419 |
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| HS code | 85389091 |
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| Weight | 0,03 kg |
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Documentation from the manufacturer
All products of the SIPLUS SB 1221 digital input modules series
Faults and fixes 6AG1221-3BD30-5XB0
Problems with 6AG1221-3BD30-5XB0: red SF LED on the module
An SF LED on a signal module means a channel or module diagnostic: missing load voltage (L+ 24 V not connected or a fuse), wire break on inputs with wire-break monitoring, a short circuit on an output, or wrong parameterisation. The CPU's diagnostic buffer names channel and cause. A module that keeps reporting SF after the cause is removed is usually defective itself.
6AG1221-3BD30-5XB0: one channel has stopped working or an output sticks
One dead channel with the rest working normally points to a damaged input or output stage, often from overvoltage, a short circuit or an inductive load without a flyback diode. Swap the wiring to a free channel to separate the module from the installation. If the channel is defective, replace the module; repairing single channels is rarely worthwhile.
What do I check when replacing a 6AG1221-3BD30-5XB0?
The same order number with the same or a higher product version (issue) fits without changing the configuration. Carry over the front connector with its wiring, put the module in the same slot and check the diagnostic buffer after power-up. On modules with parameterisation (analogue: measuring range, range selectors on the side) set the range modules to the same position.
Fault not fixed: replace, exchange or repair the 6AG1221-3BD30-5XB0?
Replacing from stock is the fastest route when a machine is down. Van Haelen supplies the 6AG1221-3BD30-5XB0 refurbished (tested, with a test report per serial number) or new in factory packaging, with a 24-month warranty. The current lead time is shown with the condition on this page. Prefer an exchange: you get a refurbished unit straight away and return the faulty one within 14 days. Repairing your own unit is also possible: diagnosis, then a fixed price.
What information should I send for a quick diagnosis?
A photo of the rating plate (order number, product version, firmware), the exact fault code or LED state, when the fault occurs (at power-up, on enable, under load) and what you have already tried. For PLCs an export of the diagnostic buffer, for drives the parameter set. With that we can usually say the same day whether replacing, exchanging or repairing is best.
Frequently asked questions
Is the 6AG1221-3BD30-5XB0 still available?
Yes. The 6AG1221-3BD30-5XB0 is still in the manufacturer's range.
What does refurbished mean?
Cleaned, inspected, aged or critical components replaced and tested to our test protocol for this product family. You get a 24-month warranty, a test report and a serial number label.
What should I check when replacing a 6AG1221-3BD30-5XB0?
Check the product version (issue) on the rating plate; for most installations the same or a higher issue is suitable.
Can I exchange or repair my faulty unit?
Yes. With an exchange Van Haelen supplies a refurbished unit straight away and you return the faulty one. With a repair you first get a diagnosis and then a fixed price, with test report and warranty.