Siemens 6ES5 931-8MD11 – S5-100U ps931
Siemens 6ES5 931-8MD11 – S5-100U ps931 from the S5-090/095/100 range. Status: discontinued by the manufacturer, no longer available new. Van Haelen supplies it refurbished, with a 24-month warranty.
Also written as: 6ES5931-8MD11, 6ES59318MD11
Also known as: PS 931, PS-931
The Siemens 6ES5 931-8MD11 is a Simatic S5 control component from the Simatic S5 (S5-090/095/100) range. Manufacturer type designation: S5-100U ps931. Status: discontinued by the manufacturer, no longer available new. Key data: weight 0.4 kg, dimensions 14,3 x 13,5 x 5,5 cm, HS code 85044082. Ask us about exchange, repair and a spare-parts pool for your installation.
Available as
Product data
| Manufacturer | Siemens |
|---|
| Part number | 6ES5 931-8MD11 |
|---|
| Type designation | S5-100U ps931 |
|---|
| Series | S5-090/095/100 |
|---|
| Manufacturer status | discontinued by the manufacturer, no longer available new |
|---|
| ETIM | EC002540 |
|---|
| HS code | 85044082 |
|---|
| Weight | 0,4 kg |
|---|
| Dimensions | 14,3 x 13,5 x 5,5 cm |
|---|
| Manufacturer EAN | 4025515055815 |
|---|
Documentation from the manufacturer
All products of the S5-090/095/100 series
All Power supplies
Faults and fixes 6ES5 931-8MD11
Problems with 6ES5 931-8MD11: no 24 V, LED off or flashing
LED off: check the mains voltage and the input fuse. LED flashing or the output coming back briefly again and again: the supply is in overload protection (hiccup), usually because of a short circuit or too heavy a load on the 24 V side. Disconnect the load: if the 24 V returns, the fault is in the installation, not in the supply.
6ES5 931-8MD11: output voltage sags or ripple increases
A supply that sags under load after years or shows more ripple usually has aged electrolytic capacitors. This shows as sporadic CPU resets, modules reporting SF or panels restarting. Replacement is then the reliable remedy; a refurbishment replaces these capacitors and tests the supply under load.
Has the manufacturer discontinued the 6ES5 931-8MD11, 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 6ES5 931-8MD11 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 6ES5 931-8MD11?
Replacing from stock is the fastest route when a machine is down. Van Haelen supplies the 6ES5 931-8MD11 refurbished: tested to this family's test protocol, with a test report per serial number, 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 6ES5 931-8MD11 still available?
Not new from the manufacturer any more: the 6ES5 931-8MD11 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.