I've hooked up a 60882 that I bought a few months ago, and it makes all the sensors on the CS3 track plan light up and flicker. I tried removing leads from it one by one, and now I have only that S88 attached to the CS3 and no wires attached to the S88, but it still spams the CS3 with unknown events.

Rocrail lists hundreds of sensor events per second:

20200812.184728.485 r9999a 993EC700 OModel 5224 trying to match sensor event: [CS3] id=[] 1:60 uidname=[] state=1 code= regval=0 info=
20200812.184728.485 r9999a 993EC700 OModel 5260 sensor key: 1_60_CS3_
20200812.184728.485 r9999a 993EC700 OModel 5280 unregistered sensor event: [CS3] 1:60 uidname=[]
20200812.184728.485 r9999c mbusrdr9 OMBUS 0964 sensor 1:61 state=1 value=10
20200812.184728.485 r9999a 993EC700 OModel 5224 trying to match sensor event: [CS3] id=[] 1:61 uidname=[] state=1 code= regval=0 info=
20200812.184728.486 r9999a 993EC700 OModel 5260 sensor key: 1_61_CS3_
20200812.184728.486 r9999a 993EC700 OModel 5280 unregistered sensor event: [CS3] 1:61 uidname=[]
20200812.184728.486 r9999c mbusrdr9 OMBUS 0964 sensor 1:62 state=1 value=10
20200812.184728.486 r9999a 993EC700 OModel 5224 trying to match sensor event: [CS3] id=[] 1:62 uidname=[] state=1 code= regval=0 info=
20200812.184728.487 r9999a 993EC700 OModel 5260 sensor key: 1_62_CS3_
20200812.184728.487 r9999a 993EC700 OModel 5280 unregistered sensor event: [CS3] 1:62 uidname=[]

It is completely broken? Or something else?

Thanks

Hi,

What do you mean? Something needs to connect to and read the module?

As soon as that module is involved, even before any track power is applied, all sensors light up and constantly flicker.

Thanks

No, I only connected Rocrail so I could see messages coming through.

Just remember you must have the S88 ground connected to ground on the layout.

According your profile, you’re using C tracks? The 60882 is meant for 2-rail tracks. How have you connected the 60882 to your layout?

Indeed, I don't know what planet the Marklin marketing people were on when they named these modules.

So let's establish some facts:

1) The incorrectly named S88 AC module measures open/closed circuits
2) The incorrectly named S88 DC module measures current
3) The terminals on the S88 DC are electrically isolated from the electronics measuring the current (I would hope)

On my layout, I hook up positive to "Ground" on the S88 module and feed the center rails from the terminals. I already have three other modules connected this way and it works great. The advantage to using the DC module over the AC module is that is it easier, less intrusive and gives greater reliability as you always have two ground rails for the trains. By hooking up the module to positive instead of ground, it means ground is completely un-broken though-out my layout adding to reliability. The down-side is that it only detects power consumption so can't see normal freight cars.

I have one S88 AC module that I use for the end of sidings so I can reverse freight cars in.

I currenly have three S88 DC and one S88 AC modules, all working fine.

Even if I un-hook everything from the module and connect only that module to the CS3, I still get the spurious events coming through.

Regards,
Henrik

Mystery solved... I think!

When I started to remove it to send it back, I realised I had plugged the bus cables in the wrong way.

Sad think is, plugging them in right way doesn't fix the issue. Would plugging them in wrong have broken the module? That's a bit weak...

Regards,
Henrik

Hi,

The modules have "flow" arrows, >, pointing towards the CS3 (I believe).

Update though, as I have tracked it down to a faulty UTP cable. Everything works fine now.

Thanks