Siemens 6ES5451-8MD11 – SIMATIC S5 Digital Output Module 451
Siemens 6ES5451-8MD11 – SIMATIC S5 Digital Output Module 451 from the S5-090/095/100 range. Status: discontinued by the manufacturer, no longer available new. Van Haelen supplies it refurbished or new in sealed factory packaging, with a 24-month warranty.
Also written as: 6ES5 451-8MD11, 6ES54518MD11
The Siemens 6ES5451-8MD11 is a Simatic S5 control component from the Simatic S5 (S5-090/095/100) range. Manufacturer type designation: SIMATIC S5 Digital Output Module 451. Status: discontinued by the manufacturer, no longer available new. Key data: weight 0.33 kg, dimensions 14,1 x 11,1 x 5,5 cm, HS code 85389091. 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 | 6ES5451-8MD11 |
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| Type designation | SIMATIC S5 Digital Output Module 451 |
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| Series | S5-090/095/100 |
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| Manufacturer status | discontinued by the manufacturer, no longer available new |
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| ETIM | EC001419 |
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| HS code | 85389091 |
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| Country of origin | DE |
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| Weight | 0,33 kg |
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| Dimensions | 14,1 x 11,1 x 5,5 cm |
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| Manufacturer EAN | 4025515053910 |
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Documentation from the manufacturer
All products of the S5-090/095/100 series
All PLC I/O modules
Faults and fixes 6ES5451-8MD11
6ES5451-8MD11 in an ET 100U does not work: where do I look?
In an ET 100U the IM 318-8 shows the state of the I/O bus and the modules (Siemens, ET 100U manual, table 5-1): ON and I/O-FAILURE means load voltage down or a diagnostic module short-circuited to M; ON, I/O DISABLED and ALARM OUTPUT an interrupted I/O bus or a wrongly plugged module. In the IM 308-3 the station's diagnostics byte points to the cause, for example F2 when a configured module is not plugged in. At power-up and whenever a module is plugged in or pulled, the ET 100U reads the module codes again.
What do I check when replacing a 6ES5451-8MD11?
According to Siemens a digital or analog module in an ET 100U may be swapped with the load supply on if the IM 318-8 is in STOP and all bus units are revision 4 or higher; otherwise switch off first. Fit the same order number: the IM 308-3 compares the modules with the configuration on its memory submodule, and a different module causes a fault.
Has the manufacturer discontinued the 6ES5451-8MD11, and what is the successor?
Siemens ended the SIMATIC S5 product life cycle on 30 September 2020: as of 1 October 2020 Siemens supplies no spare parts and performs no repairs; until that date spare parts were available subject to availability and sometimes only in exchange (Siemens product note 109776026, 26 February 2020). Siemens' successor is the SIMATIC S7-1500; the Migration Guide SIMATIC S5 to SIMATIC S7-1500 (Siemens, 105106251, 28 May 2015) holds the recommendations and notes for those who migrate, and Siemens collects the tools for the move to the TIA Portal on the page Migration of plants with SIMATIC (83557459). If the installation keeps running, Van Haelen supplies the 6ES5451-8MD11 refurbished and tested, with a 24-month warranty, and exchanges or repairs your own unit; a fault then does not force a conversion.
Fault not fixed: replace, exchange or repair the 6ES5451-8MD11?
Replacing from stock is the fastest route when a machine is down. Van Haelen supplies the 6ES5451-8MD11 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 6ES5451-8MD11 still available?
Not new from the manufacturer any more: the 6ES5451-8MD11 was discontinued. Van Haelen supplies it refurbished and tested.
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.
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.