thank you ToraDog will look into it:
The switch module is between receiver and item being controlled. ie transmitter to receiver to switch module to servo/motor/lights

Have found the Graupner switch model has twice the connection because it switches on or grd, the Robbe will switch to forward to backwards!
Also where I wnt the micro motors run forward and backward I need a "polarityinversion" cable for each one ( need 3 for Dusseldorf)

If Graupner is anything like the Robbe system, and I suspect it is, the expansion module is designed to work with a switch module that you install on your transmitter. Something like these: https://www.beier-electronic.de/modellbau/produkte/nms-16/nms-16.php

just had a thought about my Graupner system.
receiver GR-16 has 8 controls,
16 channel switch module has 16 switch controls
I need 16 different controls!
💡 Will I only use 7 controls on the receiver (the 8th as a connection to the switch module) and 9 controls on my switch module?
I think I have sorted the common earth wiring which seems to work( no blue flashes and a slightly cooked wire, now sorted)
Now looking at "Polarity inversion module" for switch module but have no idea where the third connection is (two connections seem to connect the fail safe and the FS impulse banks of sockets)👍👎

Hello MouldBuilder,
With regards to your receiver/servo set-up. Another option for you is to use 2 X8R receivers in D16 mode. You will of course need the additional receiver, but this will allow you to use the Sbus connection for telmetry, if you care to. I am using the X9E radio and have set mine up this way. It works great.
Sorry for gong off thread a bit.

Hi bombero,
That is the problem now, stock levels and delivery times are very unpredictable due to this Virus.

Martin555.

Hi Len.
Sorry I cannot help with your connections but I have never done this before either. I have never come across a Graupner system either.
I have been studying mine in more detail. I have a Taranis X9D Plus which, luckily, has 16 combinations of switches and dubrees to play with. I have decided to use an X8R receiver for eight channels and two four channel decoders connected to the x-bus output for the other eight. I hooked up the sbus last night and all seems possible. I will update my build log later with a few early pictures of the gadgets I will use. Only thing I really have to work out is how to assign the correct switch to the correct channel.
Peter.

Just been informed,Graupner GR-32 receiver not available till end of year (they did not say which year,I live in Spain) so may have to try to persevere with GR-16 and switch module untill it arrives😭😭

Sorry Len🤔
Why'd I think you were Bill? Senior moment!😁
Cheers, Doug 😎

Doug,
Have a wiring diagram for the futaba system replaced by Graupner so should be able which plug goes to direct switches and those that have controlled movements,ie servos and speed controllers(hopefully).But will study the paperwork closely, also I have just found out my mate in Albox computer club dabbled a bit in electronics so fingers crossed!🤞
Len

Good luck Bill🤞
Check out the TX manual VEERY carefully about how to assign which control on the TX to which channel port on the RX!!😉
Cheers, Doug 😎

I have not received any answers to my emails to KRICK or Graupner, so have bitten the bullet and ordered a gr-32 receiver! Will let you know the results when I get and tried it!!!

Have just been rereading the manuals for the GR-16 receiver and the 16 channel switch module manuals, If I replaced the GR-16 (which has 8 controls) and the 16 channel switch module for the GR-32 ( which has 16 controls) would this work on my dusseldorf fireboat ??????

Hi G6SWJ,
Glad to know somebody who has one and I am not alone, the switch module instructions says there should be :a 10 cm patch cable ,a coding bridge and 4 distance sleeves but as it came as a package neither the receiver nor the switch module were in boxes they were just put in with the transmitter and no accessories included, I had to download the instructions from the Graupner website.
I also emailed Graupner from the the help line twice but the first one was not answered and the second was not accepted by their website!
Len

Hi Bombero,

I have one of these but cannot find it to refresh my memory - I will look later - my den sort out in the long term will be a great thing - in the short term I have lost my sense of humour 😊

I do remember the "switched negative" concept. It's sounds nuts but from memory is very clever and flexible.

It allows you to switch different circuits on different voltages with a common switched ground/negative from one module.

You do have to tell the transmitter in the menu options that you are using a "multichannel" module and configure which pins it is connected to - again more to follow..

Also a faint memory is that the "patch" cable is just a 3 pin plug female to female servo like lead - was there not one of these in the multichannel box?

Looking on the internet the pack should come with "Patch cable to the receiver":
Package content>>
Module completely installed in the box
Spacer with loose mounting of the PCB
Jumper for Fail-Safe and
Patch cable to the receiver
Instructions

I'll go searching later for more details

Regards
Jonathan .

🤞Hello All its me again hopefully getting advice.
When I got my Romarin Fireboat Dusseldorf (because I am a 30 year firefighter now 76) enclosed with the instructions was a wiring layout for using a futaba F-14 8 channel system I thought I could follow that, however when I tried to order one from Krick I was told it was no longer available and they now recommend the Graupner mc 26 transmitter with a Gr-16 receiver and a16 channel switch module no 3972 which was available as a package, so I got one (my previous boat I got the kit recommended and had problems which Cornwall boats helped me as some bits were not compatible).
As per my previous messages I have finally got the receiver working well, but cannot understand the 16 channel switch module, It talks about a patch cable which can only be an extension lead with male ends and then switch relais and polarity inversion module!!
Contacted Krick and was told patch cable was necessary to connect the receiver and the channel module, and the robbe module has two switching outputs per slot whilst the Graupner module always switches to minus( GND) and
I AM NOW LOST!
All I want to know is where the cables go on the switch module
(tried what I thought and got a smell of overheating wires)

Hi bombero,
I have come across this before (reversing of the connectors on the receivers) another one to look out for is some receivers have the positive and negative reversed but the signal wire stays in the same place.

Fingers crossed.

Martin555.

Wow - this would have caught most of us out - well spotted - clearly shows the opposite on the cases when you look carefully!!

Using the printed text on the RX as the reference to "Top of case"

GR12 - negative to top of case
GR16 - negative to botton of case

Shocking!!!!!

Regards
Jonathan .

Panic may be over, reading the instructions for the receiver for about the tenth time the comment"insert the connectors with the brown or black upwards" only applies to the GR-12. I had followed this for my GR-16 so after reversing them things started to work, so after a good nights sleep tonight will start again programming my Graupner mc-26 and hopefully see it working properly ( I expect some faults and can deal with them accordingly)😀😀😀😀

I can operate the propellors and the rudders using my sawa 2 channel transmitter but nothing happens when I use my graupner mc-26, I have followed the manual for setting up bound the receiver,
HELP😭

That's the problem I have Len, on my Spektrum DX6, as Doug has mentioned already, you need to pull the left stick down before switching on, of if you have already switched on and the voice says 'Throttle High',then just pull the left (throttle) stick down and that should shut her up😊 It's a HER on Spektrum.

Cheers, Pete

Thank Doug,
I had deleted the boat setup(whichone of several setups)and then set up the boat one again , bound the receiver and somehow had setup a second model (helicopter) which as you had worked out and then reconnected the receiver and was able to remove the helicopter and was back to the bound receiver in the boat setting.
In the stick mode mode one the programming manual shows that the prop motors and the steering servos are preset, however they do not work( they do using my 2 channel system). Any ideas???
thanks for the help
Len👍

Hi Bombero,
I think that's 'Thr too high'. Means 'Throttle or pitch too high'.
Pull the left stick (throttle) right back before switching the TX on.
As the out-of-the box default set up is for aircraft (like 99.999% of RC gear🤔) this is a safety measure to prevent the prop / rotor chopping your fingers off😮😭
My Spektrum and Turnigy clone also irritate me with this😠
Cheers, Doug 😎