Hi Marcin,

The 74492 and 72752 are "packaged" for the MyWorld(Hobby) range.
refer the latest MyWorld Catalogue (http://mediencms.maerklin.de/media.php/de/produkte/myworld/Maerklin_myworld_2013_DE.pdf) page 80

The only difference between the 74492 and 74491(74490) is that the latter comes with a connector on the end of the cable specifically for use with the 72752.

The 72752 (and its sister 72751) have the common 4 pin connector architect-ed for getting its feed from the MyWord(Hobby) feeder track (#924089) .
This supply provides
- Ground
- TrackFeed (for use with a Signals attendand "dead section")
- -ev supply for the LEDs in the signal going one aspect
- +ev supply for the LEDs in the signal going the other aspect
NOTE: for those that the care, the +ev and -ev are NOT DC - they are simply the "clipped" digital

When needed for your turnouts, the buttons steal the +ev and the -ev to get the equivalent 16V approx

Assuming you are not looking to get a MyWorld(Hobby) set with its adapter , Two options arise
- feed the track power Brown/Red into the +ev(orange) / -ev(black) wires
- use a separate transformer (standard Marklin 16VAC)

If you cut the short 4 pin to 4 pin connector in halve it should be fairly easy to connect the wires.
If opting for the easy Red/Brown feed now, I would still recommend looking to remove this train on the track power as your layout grows by having the accessories powered of a separate transformer/powersupply

Closing note : a 6083x would certainly be applicable if you are looking to utilise digital in the future , however the more appropriate Analogue option would have been the 72720 (along with a seperate transformer) - or the 72710 ehich has indicators
If you hadn't already purchased the 72752 I would generally recommend evaluating the the 6083x for digital expansion infrastructure

---

The attached diagram is a wiring schematic of the MyWorld(Hobby) Accessory control boxes. The boxes include LED indicators that are not shown

Hi everyone,

I know I'm be asking about the absolute basics but your input will be much appreciated to help me a wee bit.

Since my last post I have returned my turnout box 72752 and am looking at buying the right set of bits and pieces this time to make my turnouts work from the Mobile Station (new one).

So the questions are:

1. If I want to control two turnouts from the MS, am I assuming correctly I will need one mechanism (74491) and one decoder (74461) per turnout?

2. Is there anything else I will need to make such combo work? E.g. those wee splitter strips, the k83 which, to be frank, I have no idea what it does in the scheme of things given the 74461 is a decoder itself.

3. With two such sets (74491 + 74461) connected, will my power supply be OK with it or do I need to get a booster of sorts?

4. Any comments on the 74445 set - is it better/worse off to buy the 74491 and 74461 separately and don't bother about the small rotating indicator? Somewhere on the forum I saw the 74445 described as unreliable.

5. If I keep adding such turnout sets, at which point a booster is required - 3, 4, 6 more of them?

6. Finally, I saw a thread on the new k84 box - as you probably realised by now, I don't have a clear idea of what its predecessor does but if I need it and buy it and then the 84 comes out in autumn 2013, will this impact my turnouts in any way?

I know - it is a nebula of semi-random questions but since I could not find some kind of "Marklin for dummies" / Wiki that would say "if you want to have Y number of digitally-controlled turnouts you will need to buy Z x A, B and C to make it work", I'm afraid I have to bother you

Thank you very much!

Marcin

Hi Marcin,

If you use the 74491 and 74461 mounted in the turnouts you have no need of a K83. A K83 is needed if you don't have the 74461 decoder, and you can then supply four 74491s from each k83.

The three way turnout cannot be fitted with the 74461, as it actually uses two 74491 mechanisms, so if you wanted a three way turnout you would use half of a k83 to feed it.

A k84 is for digitally switching accessories that need a power on/off instead of a momentary pulse like a solenoid. You would use it for, for example, street lights, rotating signs, windmills, etc.

From wikipedia:

Märklin k83:

The Märklin k83 is one of the components of the Märklin Digital system for controlling model trains.

The Märklin k83 module allows 4 electromagnetic articles to be switched to either 'red' or 'green'. These are used for setting turnouts, signals etc.

The address of each module is set by a DIP switch inside the housing.

The current that is produced is momentary—just long enough to switch the electromagnet in the item from one state to the other. Permanent switching of a continuous current is handled by a separate module—the Märklin-60840 or k84.

Märklin k84

The Märklin k84 is one of the components of the Märklin Digital system for controlling model trains.

The Märklin k84 module is essentially 4 digital relays, each with 2 mutually-exclusive outputs. These modules are used for switching current on and off. The address of each module is set by a DIP switch inside the housing.

The current that is produced is continuous. Momentary switching for the purposes of switching electromagnetic devices is handled by a separate module—the Märklin-60830 or k83.

Thanks Dr D and Ray - it starts to make sense. So am I right assuming that a k83 is a "shared resource" in case where one has multiple turnouts / lights and doesn't want to/cannot supply each with its own 74461 (or equivalent)?

In my, admittedly, very basic setup when I want to start with two basic turnouts I just need to plug them in, select the two addresses and voila? No need for power booster and other auxiliaries yet? And what about the 74445 - does it make sense to get it or rather individual bits?

Cheers!

This was exactly what I was just looking for.

So I cut the short cable as you suggested, joined the red & brown to the orange & black
and BOTH lights lit up - in the red position the red on the signal was slightly brighter and
in the green position the green was slightly brighter.

Any further suggestions please?