DCC and 17100's

chasaitch

chasaitch

chasaitch
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Is there any way of operating an LGB 51950 colour light signal connected to a 55025 decoder to set the road, for it to be returned to red by a 17100 track contact. I managed to get something going for a minuite or two before my 17100 gave a spark, perhaps I should have replaced its cover before passing the magnet too close. Afterwards the 55025 would push the drive one way but not 'tother and this on all 4 chanels, an expensive experiment!
 
Last edited:
muns said:
Can you post a wiring diagram so we can comment further.

FYI, the Massoth Switch decoders have inputs so that a "switch device" can trigger operation as well as commands from your Central Station. Plus they are cheaper than the LGB 55025.

http://gardenrailoutlet.co.uk/massoth-dimax-4-channel-switch-decoder-ii
Click to expand...

I am not a DCC user, but have often wondered what the Massoth DCC reeds actually 'do' and how they differ from the analogue type. My guess is that the Massoth ones would be needed rather then the old analogue 17100/1700 type, of which I am a keen user.

One thought that crossed my mind was whether an analogue type reed could be wired to act/switch into the 'orange' output wire of the 55025 as it leads out to the signal itself?

Just a thought!

I am following this thread with interest!

James
 
James, the Massoth Digital track contacts are basically a solid state version of a reed switch (a HAL effect sensor in fact, no moving parts). They need to be powered and they cannot be used to operate in the same manor as the LGB 17100 EPL track contacts as they only provide a "logic" type signal.
 
As requested here find the wiring diagram. Since I posted the problem and with your reply I have been researching the Massoth 8156101 swich decoder, will I be able to use my LGB 17100 track contacts with it? because it seems an ideal solution.
 

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  • Wiring Diagram.jpg
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Oh dear!

If the item marked 22025 is in fact a LGB 55025 switch decoder then I suspect that you would have fried it a goodun! Normally outputs on such devices do not like to have external voltages passed to them (from the 50110 transformer when the reed triggers).


Yes, it should be possible to use the 17100 track contact to trigger the Massoth Switch decoder.
 
I have looked at the Massoth 8156101 switch decoder manual and apart from a picture of 4 space invaders on page 8 gives one no idea of how to wire the 17100 track relay to the decoder. I have found that the 17100 does not work with track current in DCC mode which is why my experimenting has resulted in such calamitous experience so I thought I should ask some one who might have the know how.
 
Like this....

Note: The two outer connectors should be bridged.

17100_MESW4.png
 
Mark has explained it well. With the Massoth 4 switch decoder you can drive it using DCC (that provides the power to fire the motor and the signal to say when) or you can use another pair of contacts in a simple on/off switch to say when. So the 17100 acts as the simple on/off switch in this case, don't provide power to it as that is provided by DCC to the decoder and then to the switch.
BTW there are 2 models of the Massoth 4 switch decoder, the old one (8156001) has screw contacts for these auxilliary switches but only provides them for the first 3 ports, the new one (8156101) has solder contacts but provides switching on all 4 (the picture Mark has provided). The old one is shown below in case that is the one you have, but the principle is the same.
massoth.jpg
 
Presumably I set the signal for off via the navigator and then the signal can be reset to red by the relay, but which side of the contacts do I solder the leads to the 17100?
 
Not sure I understand your last but here goes.....

You should wire up the signal to the switch decoder and be able to operate it via your Navigator.

Each set of 3 solder pads in the Switch decoder relate to SW1, SW2, SW3 & SW4 left to right respectively.

To determine which contact side you need to trigger, with the signal in the position you wish to switch it from (i.e. at proceed) short the middle contact of the 3 with one of the outer two. If the signal changes then that is where you should connect the 17100 to, if it dosnt try the other.

You should connect the center terminal in the Switch decoder to the Center terminal of the 17100 and both outer terminals of the 17100 to the determined outer contact in the switch decoder.

Hope that helps.
 
I would like to thank every one who has posted on this thred. No you cant do it with a LGB 55025 but you can do it with the Massoth 8156101. It did require a bit of soldering, which I managed without wrecking circuit board. I am indebted to Peter Ting at Massoth who gently encouraged me not to be such a whimp. I am now an expert! so anyone wanting advice please dont hesitate to ask!
 
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