Viessmanns 5211 don´t have same connecting as Marklins k83.
Did you followed manual with 5211?
Never use external power for 5211 when you use Marklins digital system.
Digital system feeds power to the decoder k83 or 5211.
But you must connect 5211 as manual shows.

No no no!!!
Never use Brown wire and yellow wire connect to digital Power!!
Or else you burn out switch function in the toilett!!

Hi Richard:

Marklin K83 and Viessmann 5211 are almost identical with two exceptions:

a) the most obvious is that the Viessmann decoder can be programmed without disassembling the case
b) the "red" terminal E of the Viessmann decoder. This connection has to be powered by an external transformer (=from a non-digital source) in order to switch your signals. This avoids "wasting" digital current. To connect an external transformer, connect the brown cable (=ground) to the brown terminal, and the yellow cable from the outside transformer to the red "E" terminal. Otherwise, the connections are identical to the Marklin K83.
If you don't want to use an external transformer, just connect the red "E" terminal to the red cable coming from the digital source. In both cases, the terminal "E" must be connected either to an external transformer or to a digital source.

There is no risk of incompatibility between an external transformer and for example a Marklin central station. The two sources of current are indeed insulated from each other in the Viessmann 5211. I have a few of those and I have no conflict at all between the two sources of current.

In your case, I am wondering however if the coils in the Marklin 7039 and 7040 are drawing too much power from the Viessmann decoder and made the switching impossible.

In any case the terminal "E" must always be connected. I have attached the Viessmann cabling schematics (in German and English). Figure 1 represents the way the decoder must be connected without an external transformer. The second figure illustrates how the connections are when the decoder is connected to both digital and analog power sources.

Regards,

Pierre

As promised, the photo below shows basic wiring differences between my Marklin k83 and a VM-5211. Power and ground inputs for both are from digital track current. Each unit is shown with a 7040 Semaphore connected. Wired as shown, both work well.

The need for the extra top-to-bottom input wire shunts on the 5211 doesn’t make sense to me, but I’m not able to make the unit functional without them. I have still not been able to successfully use the 5211 with an external accessory transformer.

Comments, explanations, or other options appreciated.

Update on 18 December . . . . . The wiring shown below works well for powering from digital track current. See Post #11 for differences when powering from an external transformer. Both ways work for me, but please correct if anything appears "dangerous".


Best regards for the Holiday Season -- Richard

Edited by user 18 December 2013 06:21:28(UTC)  | Reason: Update

Sorry...my fault.

Hi Richard,all,
When I built my ETE modules and old layout,I used the 5211 because,they were cheaper than the M k83's and you could use an external power supply.Two good reasons,IMHO,...
My situation was different: points were thrown via Peco solenoids and Viessmann signals(which like M can have the lights powered separately.)Thus saving more power for trains,...
Good to hear that the problem is solved.

Dirt

Hi Richard,all,



As are many products inclusive to Germany,so you order from your favorite shop,.....and there are many shops,here and there that will find these items,...

Dirt

I've used both solutions. In the case where I wanted track control but there were no signals (for use in a shadow storage yard) I used K84's. In cases where there were signals, I've used a K83 along with a 7244 relay to control track power.

I've only ever used the V5213 K84 and don't have any experience with m84's, so can't comment there.