voltage

im new to this c-bus stuff just wired 5 dimmers and 1 relay and all the pink cat 5 cables are in but dont seem to be getting any voltage in the pink cat 5 cable not sure on this as i have a junction box with 24 pink cat 5 cables into 1 is this a problem and will it caues me to have no voltage there?


thanx jason

 

Hi jason

I know it may be obvious but just to be sure you have used units with power supplies?

 

yes

yes have the ones with the power surpply ive also read on this forum that if you hold down 1 of the channels for 10 seconds you will light up the c-bus light on the dimmer but then you have to sort out the clockon the tool kit is this right?

thanx jason

 

Where have you not got voltage, have you got the c-bus and unit lights on on the dimmers and relay.
and just do not have voltage to the input units, how have you connected to the network ie. did you crimp an rj45 plug on or strip back a c-bus lead?

 

no voltage on the pink cat 5 cable, used rj45, only have the unit light on, network cant find anything using the usb conection does the clock have anything to do with it or the way i have junction boxed the cat 5 cable ie 24 into 1 the job was started b4 me

 

hi Jason

you need to enable a c-bus clock and also make sure you have a burden on the network the cabling sounds a bit messy but in theory you can wire the network star or daisy chain or both so it should be OK, it sounds like you may have a short on the cabling check all your connections make sure you have paired up all the cables correctly maybe you could try disconnecting the network back to the output units and just do a scan on that to start with once you have that you could start re-connecting the legs of the network onced checked

regards

basil

 

thanx

thanx for that i will try tomorrow and let you know on this post how i got on may need your help during the day if you on if thats ok?


thanx jason

 

Hey Jason
If the unit light is on it means you have 240V at the unit. If you have no network light on it can be a number of things (no clock, not enough power supplies, a short on the bus cable). The way it's been done of having 24 into 1 cable is ok - not ideal but will still work.
First thing i would test is to disconnect all your field cables so that just the output units are connected with my PC interface then make sure the network is up and you can scan the output units. Then connect in the one lead going out and test to see if you are getting any DC voltage (the network light should stay on when you connect this cable and it should be above 28VDC). If you get voltage on the one cable then you may have a short on one of the 24 cables you've got running out. Start connecting each, one at a time until you seen the network light drop out then thats you problem cable.

Hope it helps

 

Have you used any none cbus cat5 leads to connect the dimmers ti the outgoing wiring at any point ? Like a patch lead from a pc.

 

no

no all pink cat 5 c-bus cable

 

How have you got the file wiring into the dimmer cbus rj45 socket.

 

thanx

thanx for all your help got it working today some shorts on the pink cat 5 cable so just need to do then thats its thanx alot for these forums

cheers jason