Mpi Cable Siemens
Mette Florida
Long version: I have designed a device using LOGO! 8 for a customer. The device fits in a cabinet. I know you can extend the LOGO! by mounting Digital and Analog I/O units side by side the base unit using the interface referred to as X70 in the base module. I have done it before and it works very well. The issue is that my customer would prefer the extention units to be placed in a separate cabinet, so he can keep the base cabinet as a standard and sell the extention cabinet separately. Is there a way to connect the logo Base Module to the extention modules via a cable instead of mounting them side by side?
In addition, there shouldn't be just one cable because the bus is not electrically isolated. There is a risk that, for example, a 24V expansion module is connected to a 230V base module. This would then allow 230V potential to reach the 24V expansion module.
1. so the expansion modules are powered by via the base module already? Then why do they have their own L+ and M terminals? The AM2 even has two of each, which already made me a bit confused the first time I saw it, but I thought maybe each analog input could potentially have its own supply... I have connected +24V and GND to all of those terminals, so it looks like I have a lot of unneccessary cabling in my device :D
3. I get what they're saying in the video, but it's not ideal in my use-case. In addition to using a bigger LOGO! Base Module in the extension cabinet, I would also need to add an Ethernet switch in my original cabinet, since I already used both of the available Ethernet ports in the TDE. I agree with you that a cable would not be suitable if I had 230V LOGO devices, but since we only use 24V DC and we have full control of the cabinets I am still tempted to use a cable. What I was originally concerned about whas if adding a cable would add disturbances to the communication and make the LOGO operation more unstable.
1.) I did not write that the expansion modules receive their power supply via the bus. I just wrote that the bus is potential-bound. The expansion modules require their own power supply.
3.) Siemens will probably have its reasons why they don't offer a cable for the bus. In my opinion, the bus is not intended for long distances. The signals would probably have to be amplified over longer distances.
But these are questions that the users here cannot answer. You can only get the answers from Siemens.
To do this, start a Support Request. Maybe then you will get the answers you expect.
In the long past i have connected a 230Vac type extention to a 12Vdc extension and it works as long you don't have any other galvanic connection. This is very hazzardous though and i will never do that again or recommends that.
In the long past i have connected a 230Vac type extention to a 12Vdc extension and it works as long you don't have any other galvanic connection. This is very hazzardous though and i will never do that again or recommends that.
Hmm good question.
Think jan-k is using a 5V cable and this also works. So in my opinion it doesn't matter.
But to be honest I don't know that much about this interface, just how to use it and that it works for my cable with 3,3V.
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Siemens Brothers and Company Limited was an electrical engineering design and manufacturing business in London, England. It was first established as a branch[note 1] in 1858 by a brother of the founder of the German electrical engineering firm Siemens & Halske. The principal works were at Woolwich where cables and light-current electrical apparatus were produced from 1863 until 1968. The site between the Thames Barrier and Woolwich Dockyard has retained several buildings of historic interest.[1][2] New works were built at Stafford in 1903 and Dalston in 1908.
Siemens Brothers and Company Limited was bought by Associated Electrical Industries in 1955. At that time its business was described as follows: manufacture sale and installation of submarine and land cables, overhead telegraph, telephone and power transmission lines, public and private telephone exchanges and carrier transmission equipment for telephone lines and marine radio and signalling equipment. Through subsidiaries it was engaged in the manufacture of lamps of all kinds, miscellaneous electrical equipment and electrical railway signals.[4]
The German Siemens brothers came from a highly educated upper-middle-class family in relatively humble economic circumstances. Their father farmed a leased estate. The elder brothers of the family were born in the Kingdom of Hanover. In 1823, the year William (Wilhelm) was born, the family moved to the Baltic coast, near Lbeck. Both parents had died by the time William was 17.[5][note 2]
Siemens Brothers Telegraph Works opened as a new cable factory in Woolwich, London in 1863.[8] It expanded to cover over 6 acres and employed more than 2,000 people. In 1869 the London and Berlin firms jointly made and laid a telegraph line from Prussia to Teheran which formed a principal part of the direct line from England to India, 2,750 miles.[6] Principal cables made and laid by Siemens Brothers between 1873 and 1883:
The invention of the dynamo in 1867 led to a switch from Siemens' previous strength in light-current products to heavy-current products and processes.[5] The world's first modern high-voltage power station was opened in 1891, Deptford East. Designed in 1887 by 23-year-old former Siemens' apprentice Sebastian de Ferranti it was erected by the London Electricity Supply Corporation on the Thames bank at Deptford Creek, two and a half miles west of Siemens' Woolwich site. Berlin was anxious that the London business should break its reliance on the submarine cable business. The London County Council discouraged that kind of development and after considering other locations Stafford was settled on. 500 acres of freehold land were purchased there in 1900 and building began in 1901.[9]
In December 1880 a limited liability company was formed to own the firm and it was named Siemens Brothers and Company Limited.[11] There were just seven shareholders, the legal minimum. All except Loeffler were family members. William was chairman and Loeffler managing director.[9]
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